UC20 Hardware Design UMTS/HSPA Module Series Rev. UC20_Hardware_Design_V1.4 Date: 2014-10-22 www.quectel.com UMTS/HSPA Module Series UC20 Hardware Design Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com Or our local office, for more information, please visit: http://www.quectel.com/support/salesupport.aspx For technical support, to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx GENERAL NOTES QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS' REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. THE INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. COPYRIGHT THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN. Copyright (c) Quectel Wireless Solutions Co., Ltd. 2014. All rights reserved. UC20_Hardware_Design Confidential / Released 1 / 82 UMTS/HSPA Module Series UC20 Hardware Design About the Document History Revision Date Author Description 1.0 2013-07-17 Mountain ZHOU Initial Mountain ZHOU 1. 2. 3. 4. 5. Updated USB driver information. Added GNSS contents in Chapter 4. Added GNSS current consumption. Updated GNSS antenna requirements. Released USIM_PRESENCE function. 1. 2. 3. 4. Added UC20-G information. Added AMR-WB feature. Added USB upgrade test points' diagram. Added reference design of transistor circuit on UART interface. Deleted debug function of Debug UART interface. Released AP_READY, main UART upgrade function and Rx-diversity function. Modified UC20-A frequency bands. Modified W_DISABLE# definition. Modified GNSS sensitivity definition. Modified turning on timing figure. Added power saving methods in Sleep Mode in Chapter 3.5.1. Updated airplane mode in Chapter 3.5.2. Updated I2C pins definition. Updated current consumption. 1.1 2013-08-29 5. 6. 1.2 2014-01-21 Mountain ZHOU 7. 8. 9. 10. 11. 12. 13. 14. 1. 1.3 2014-03-05 Mountain ZHOU 2. 3. UC20_Hardware_Design Modified VDD_2V85 pin definition and GNSS LNA design circuit. Added notes about UC20 versions in Chapter 2.1. Added description about the sleep mode in Confidential / Released 2 / 82 UMTS/HSPA Module Series UC20 Hardware Design 4. 5. 1. 2. 3. 4. 1.4 2014-10-22 Mountain ZHOU 5. 6. 7. 8. 9. UC20_Hardware_Design Chapter 3.16.2. Updated power circuit of Figure 6. Updated current consumption. Updated internet protocol features and USB driver. Updated VBAT input voltage range. Updated Chapter 3.6.2, and added VBAT drop figure. Updated antenna requirement in Chapter 5.3.1. Updated current consumption. Updated recommended footprint in Chapter 7.2. Deleted description of UART autobauding. Deleted Chapter of USIM connector. Changed TXB0108 chip to TXS0108 chip. Confidential / Released 3 / 82 UMTS/HSPA Module Series UC20 Hardware Design Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 4 Table Index ................................................................................................................................................... 6 Figure Index ................................................................................................................................................. 7 1 Introduction .......................................................................................................................................... 9 1.1. Safety Information.................................................................................................................... 10 2 Product Concept ................................................................................................................................ 11 2.1. General Description ................................................................................................................. 11 2.2. Key Features ........................................................................................................................... 12 2.3. Functional Diagram ................................................................................................................. 14 2.4. Evaluation Board ..................................................................................................................... 15 3 Application Interface ......................................................................................................................... 16 3.1. General Description ................................................................................................................. 16 3.2. Pin Assignment ........................................................................................................................ 17 3.3. Pin Description......................................................................................................................... 18 3.4. Operating Modes ..................................................................................................................... 24 3.5. Power Saving........................................................................................................................... 25 3.5.1. Sleep Mode .................................................................................................................... 25 3.5.1.1. UART Application ................................................................................................. 25 3.5.1.2. USB Application with Suspend Function ............................................................. 26 3.5.1.3. USB Application without Suspend Function ........................................................ 26 3.5.2. Airplane Mode ................................................................................................................ 27 3.6. Power Supply........................................................................................................................... 28 3.6.1. Power Supply Pins ......................................................................................................... 28 3.6.2. Decrease Voltage Drop .................................................................................................. 28 3.6.3. Reference Design for Power Supply .............................................................................. 29 3.6.4. Monitor the Power Supply .............................................................................................. 30 3.7. Turn on and off Scenarios ....................................................................................................... 30 3.7.1. Turn on Module Using the PWRKEY ............................................................................. 30 3.7.2. Turn off Module .............................................................................................................. 32 3.7.2.1. Turn off Module Using the PWRKEY Pin............................................................. 32 3.7.2.2. Turn off Module Using AT Command ................................................................... 33 3.7.2.3. Automatic Shutdown ............................................................................................ 33 3.8. Reset the Module..................................................................................................................... 34 3.9. RTC Backup............................................................................................................................. 36 3.10. UART Interface ........................................................................................................................ 37 3.11. USIM Card Interface ................................................................................................................ 40 3.12. USB Interface .......................................................................................................................... 43 3.13. PCM and I2C Interface ............................................................................................................ 44 3.14. ADC Function .......................................................................................................................... 47 UC20_Hardware_Design Confidential / Released 4 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.15. Network Status Indication ........................................................................................................ 48 3.16. Operating Status Indication ..................................................................................................... 49 3.16.1. STATUS .......................................................................................................................... 49 3.16.2. SLEEP_IND.................................................................................................................... 49 3.17. Behavior of the RI .................................................................................................................... 51 4 GNSS Receiver ................................................................................................................................... 52 4.1. General Description ................................................................................................................. 52 4.2. GNSS Performance ................................................................................................................. 53 4.3. Layout Guideline ...................................................................................................................... 54 5 Antenna Interface ............................................................................................................................... 55 5.1. GSM/UMTS Antenna Interface ................................................................................................ 55 5.1.1. Pin Definition .................................................................................................................. 55 5.1.2. Operating Frequency ..................................................................................................... 55 5.1.3. Reference Design .......................................................................................................... 56 5.2. GNSS Antenna Interface ......................................................................................................... 57 5.2.1. Reference Design for Passive Antenna ......................................................................... 57 5.2.2. Reference Design for Active Antenna ............................................................................ 58 5.3. Antenna Installation ................................................................................................................. 58 5.3.1. Antenna Requirement .................................................................................................... 58 5.3.2. Install the Antenna with RF Connector .......................................................................... 59 6 Electrical, Reliability and Radio Characteristics ............................................................................ 61 6.1. Absolute Maximum Ratings ..................................................................................................... 61 6.2. Power Supply Ratings ............................................................................................................. 61 6.3. Operating Temperature ............................................................................................................ 62 6.4. Current Consumption .............................................................................................................. 62 6.5. RF Output Power ..................................................................................................................... 66 6.6. RF Receiving Sensitivity .......................................................................................................... 67 6.7. Electrostatic Discharge ............................................................................................................ 67 7 Mechanical Dimensions .................................................................................................................... 68 7.1. Mechanical Dimensions of the Module.................................................................................... 68 7.2. Footprint of Recommendation ................................................................................................. 71 7.3. Top View of the Module ........................................................................................................... 72 7.4. Bottom View of the Module...................................................................................................... 72 8 Storage and Manufacturing .............................................................................................................. 73 8.1. Storage..................................................................................................................................... 73 8.2. Manufacturing and Welding ..................................................................................................... 73 8.3. Packaging ................................................................................................................................ 74 9 10 11 12 Appendix A Reference....................................................................................................................... 76 Appendix B GPRS Coding Scheme ................................................................................................. 80 Appendix C GPRS Multi-slot Class .................................................................................................. 81 Appendix D EDGE Modulation and Coding Scheme ..................................................................... 82 UC20_Hardware_Design Confidential / Released 5 / 82 UMTS/HSPA Module Series UC20 Hardware Design Table Index TABLE 1: UC20 SERIES FREQUENCY BANDS ............................................................................................... 11 TABLE 2: UC20 KEY FEATURES ..................................................................................................................... 12 TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 18 TABLE 4: PIN DESCRIPTION ........................................................................................................................... 18 TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 24 TABLE 6: VBAT AND GND PINS....................................................................................................................... 28 TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 30 TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 34 TABLE 9: PIN DEFINITION OF THE MAIN UART INTERFACE ....................................................................... 37 TABLE 10: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 38 TABLE 11: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 38 TABLE 12: PIN DEFINITION OF THE USIM INTERFACE ............................................................................... 40 TABLE 13: USB PIN DESCRIPTION ................................................................................................................ 43 TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACE.......................................................................... 46 TABLE 15: PIN DEFINITION OF THE ADC ...................................................................................................... 47 TABLE 16: CHARACTERISTIC OF THE ADC .................................................................................................. 47 TABLE 17: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 48 TABLE 18: WORKING STATE OF THE NETWORK INDICATOR..................................................................... 48 TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................ 49 TABLE 20: PIN DEFINITION OF SLEEP_IND .................................................................................................. 50 TABLE 21: BEHAVIOR OF THE RI ................................................................................................................... 51 TABLE 22: GNSS PERFORMANCE ................................................................................................................. 53 TABLE 23: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 55 TABLE 24: THE MODULE OPERATING FREQUENCIES ................................................................................ 55 TABLE 25: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 57 TABLE 26: GNSS FREQUENCY ....................................................................................................................... 57 TABLE 27: ANTENNA REQUIREMENTS.......................................................................................................... 59 TABLE 28: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 61 TABLE 29: THE MODULE POWER SUPPLY RATINGS .................................................................................. 61 TABLE 30: OPERATING TEMPERATURE ........................................................................................................ 62 TABLE 31: THE MODULE CURRENT CONSUMPTION .................................................................................. 63 TABLE 32: CONDUCTED RF OUTPUT POWER ............................................................................................. 66 TABLE 33: CONDUCTED RF RECEIVING SENSITIVITY................................................................................ 67 TABLE 34: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 67 TABLE 35: RELATED DOCUMENTS ................................................................................................................ 76 TABLE 36: TERMS AND ABBREVIATIONS ...................................................................................................... 76 TABLE 37: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 80 TABLE 38: GPRS MULTI-SLOT CLASSES ...................................................................................................... 81 TABLE 39: EDGE MODULATION AND CODING SCHEME ............................................................................. 82 UC20_Hardware_Design Confidential / Released 6 / 82 UMTS/HSPA Module Series UC20 Hardware Design Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 15 FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 17 FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 25 FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION........................................................................ 26 FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION.................................................... 27 FIGURE 6: VOLTAGE DROP DURING TRANSMITTING BURST.................................................................... 29 FIGURE 7: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 29 FIGURE 8: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 30 FIGURE 9: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 31 FIGURE 10: TURN ON THE MODULE USING KEYSTROKE ......................................................................... 31 FIGURE 11: TIMING OF TURNING ON MODULE ........................................................................................... 32 FIGURE 12: TIMING OF TURNING OFF MODULE ......................................................................................... 33 FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 35 FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 35 FIGURE 15: TIMING OF RESETTING MODULE ............................................................................................. 35 FIGURE 16: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ................................................................ 36 FIGURE 17: RTC SUPPLY FROM RECHARGEABLE BATTERY .................................................................... 36 FIGURE 18: RTC SUPPLY FROM CAPACITOR .............................................................................................. 37 FIGURE 19: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 39 FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 39 FIGURE 21: RS232 LEVEL MATCH CIRCUIT .................................................................................................. 40 FIGURE 22: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ................................................................... 41 FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ................................................................... 42 FIGURE 24: REFERENCE CIRCUIT OF USB APPLICATION ......................................................................... 43 FIGURE 25: TEST POINTS OF FIRMWARE UPGRADE ................................................................................. 44 FIGURE 26: PRIMARY MODE TIMING ............................................................................................................ 45 FIGURE 27: AUXILIARY MODE TIMING .......................................................................................................... 45 FIGURE 28: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 46 FIGURE 29: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 48 FIGURE 30: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 49 FIGURE 31: REFERENCE CIRCUIT OF THE SLEEP_IND ............................................................................. 50 FIGURE 32: RELATIONSHIP BETWEEN SLEEP AND NETWORK PAGING .................................................. 50 FIGURE 33: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 56 FIGURE 34: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA............................................................. 57 FIGURE 35: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ............................................................... 58 FIGURE 36: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 59 FIGURE 37: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 60 FIGURE 38: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 60 FIGURE 39: UC20 TOP AND SIDE DIMENSIONS ........................................................................................... 68 FIGURE 40: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ....................................................................... 69 FIGURE 41: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 70 UC20_Hardware_Design Confidential / Released 7 / 82 UMTS/HSPA Module Series UC20 Hardware Design FIGURE 42: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 71 FIGURE 43: TOP VIEW OF THE MODULE ...................................................................................................... 72 FIGURE 44: BOTTOM VIEW OF THE MODULE .............................................................................................. 72 FIGURE 45: LIQUIDS TEMPERATURE ............................................................................................................ 74 FIGURE 46: CARRIER TAPE ............................................................................................................................ 75 UC20_Hardware_Design Confidential / Released 8 / 82 UMTS/HSPA Module Series UC20 Hardware Design 1 Introduction This document defines the UC20 module and describes its hardware interface which are connected with your application and the air interface. This document can help you quickly understand module interface specifications, electrical and mechanical details. Associated with application notes and user guide, you can use UC20 module to design and set up mobile applications easily. UC20_Hardware_Design Confidential / Released 9 / 82 UMTS/HSPA Module Series UC20 Hardware Design 1.1. Safety Information The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating UC20 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability for customer failure to comply with these precautions. Full attention must be given to driving at all times in order to reduce the risk of an accident. Using a mobile while driving (even with a handsfree kit) cause distraction and can lead to an accident. You must comply with laws and regulations restricting the use of wireless devices while driving. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it switched off. The operation of wireless appliances in an aircraft is forbidden to prevent interference with communication systems. Consult the airline staff about the use of wireless devices on boarding the aircraft, if your device offers a Airplane Mode which must be enabled prior to boarding an aircraft. Switch off your wireless device when in hospitals or clinics or other health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment. Cellular terminals or mobiles operate over radio frequency signal and cellular network and cannot be guaranteed to connect in all conditions, for example no mobile fee or an invalid SIM card. While you are in this condition and need emergent help, please remember using emergency call. In order to make or receive call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength. Your cellular terminal or mobile contains a transmitter and receiver. When it is ON , it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment. In locations with potencially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potencially exposive atmospheres including fuelling areas, below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles such as grain, dust or metal powders. UC20_Hardware_Design Confidential / Released 10 / 82 UMTS/HSPA Module Series UC20 Hardware Design 2 Product Concept 2.1. General Description UC20 is an embedded HSPA+/EDGE engine with Rx-diversity. Its UMTS-based modem provides data connectivity on HSPA+, HSDPA, HSUPA, WCDMA, EDGE, GPRS networks. It can also provide GPS/GLONASS and voice functionality1) for your specific application. UC20 offers a maximum data rate of 14.4Mbps on downlink and 5.76Mbps on uplink in HSPA+/HSPA mode. UC20 also support GPRS/EDGE multi-slot class 12. GPRS supports the coding schemes CS-1, CS-2, CS-3 and CS-4. EDGE supports CS1-4 and MCS1-9 coding schemes. UC20 contains three variants UC20-A, UC20-E and UC20-G. You can choose the dedicated type based on the wireless network configuration. The following table shows the entire radio band configuration of UC20 series. Table 1: UC20 Series Frequency Bands Module GSM 850 EGSM 900 DCS 1800 PCS UMTS 1900 800 UMTS 850 UMTS 900 UC20-A UC20-E UC20-G UMTS 1900 UMTS 2100 Rxdiversity GNSS NOTE 1) . UC20 series (UC20-A/UC20-E/UC20-G) includes Data-only and Telematics versions. Data-only version does not support voice function, Telematics version supports it. More details about GPRS/EDGE multi-slot configuration and coding schemes, please refer to Appendix B, C and D. With a tiny profile of 32.0mm x 29.0mm x 2.5mm, UC20 can meet almost all requirements for M2M application such as automotive, metering, tracking system, security solutions, routers, wireless POS, mobile computing devices, PDA phone and tablet PC, etc.. UC20_Hardware_Design Confidential / Released 11 / 82 UMTS/HSPA Module Series UC20 Hardware Design UC20 is an SMD type module, which can be embedded in application through its 112-pin pads including 72 LCC signal pads and 40 other pads. UC20 is integrated with internet service protocols like TCP/UDP and PPP. Extended AT commands have been developed for customer to use these internet service protocols easily. 2.2. Key Features The following table describes the detailed features of UC20 module. Table 2: UC20 Key Features Feature Details Power Supply Supply voltage: 3.3V~4.3V Typical supply voltage: 3.8V Frequency Bands UC20-A: UMTS850/1900 UC20-E: GSM850/900/1800/1900, UMTS900/2100 UC20-G: GSM850/900/1800/1900, UMTS800/850/900/1900/2100 Transmission Data HSPA R6: Max 14.4Mbps (DL)/Max 5.76Mbps (UL) UMTS R99: Max 384kbps (DL)/Max 384kbps (UL) EDGE: Max 236.8kbps (DL)/Max 236.8kbps (UL) GPRS: Max 85.6kbps (DL)/Max 85.6kbps (UL) CSD: 14.4kbps Transmitting Power Class 4 (33dBm2dB) for GSM850 and EGSM900 Class 1 (30dBm2dB) for DCS1800 and PCS1900 Class E2 (27dBm3dB) for GSM850 and EGSM900 8-PSK Class E2 (26dBm+3/-4dB) for DCS1800 and PCS1900 8-PSK Class 3 (24dBm+1/-3dB) for UMTS800/850/900/1900/2100 HSPA and UMTS Features HSPA data rate is corresponded with 3GPP R6. 14.4Mbps on downlink and 5.76Mbps on uplink. WCDMA data rate is corresponded with 3GPP R99/R4. 384kbps on downlink and 384kbps on uplink. Support both 16-QAM and QPSK modulation. GSM/GPRS/EDGE Data Features GPRS: Support GPRS multi-slot class 12 (10 by default) Coding scheme: CS-1, CS-2, CS-3 and CS-4 Maximum of four Rx time slots per frame EDGE: Support EDGE multi-slot class 12 (12 by default). Support GMSK and 8-PSK for different MCS (Modulation and Coding UC20_Hardware_Design Confidential / Released 12 / 82 UMTS/HSPA Module Series UC20 Hardware Design scheme). Downlink coding schemes: CS 1-4 and MCS 1-9 Uplink coding schemes: CS 1-4 and MCS 1-9 CSD: CSD transmission rates: 14.4kbps non-transparent Support Unstructured Supplementary Services Data (USSD). Internet Protocol Features Support TCP/UDP/PPP/FTP/SMTP/HTTP/FILE/MMS/SSL protocols Support the protocols PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) usually used for PPP connections. SMS Text and PDU mode Point to point MO and MT SMS cell broadcast SMS storage: ME by default USIM Interface Support USIM/SIM card: 1.8V, 3.0V Audio Features Support one digital audio interface: PCM interface GSM: HR/FR/EFR/AMR/AMR-WB WCDMA: AMR/AMR-WB Echo cancellation and noise suppression PCM Interface Used for audio function with external codec. Support 8-bit A-law, -law and 16-bit linear data formats. Support long frame sync and short frame sync. Support master and slave mode, but must be the master in long frame sync. UART Interface Support two UART interfaces: main UART interface and debug UART interface. Main UART interface: Seven lines on main UART interface Support RTS and CTS hardware flow control Baud rate can reach up to 921600bps, 115200bps by default Used for AT command, data transmission or firmware upgrade Support multiplexing function Debug UART interface: Two lines on debug UART interface: DBG_TXD and DBG_RXD Can be used for GNSS NMEA sentences output USB Interface Compliant with USB 2.0 specification (slave only), the data transfer rate can reach up to 480Mbps. Used for AT command communication, data transmission, GNSS NMEA output, software debug and firmware upgrade. USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8, Windows CE5.0/6.0/7.0, Linux 2.6/3.0, Android 2.3/4.0/4.2. Rx-diversity Support UMTS Rx-diversity UC20_Hardware_Design Confidential / Released 13 / 82 UMTS/HSPA Module Series UC20 Hardware Design GNSS Features Gen8 of Qualcomm GNSS engine (GPS and GLONASS) Protocol: NMEA 0183 AT Commands Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT commands. Real Time Clock Implemented Network Indication Two pins including NET_MODE and NET_STATUS to indicate network connectivity status. Antenna Interface Include main GSM/UMTS antenna, UMTS diversity antenna and GNSS antenna. Physical Characteristics Size: 32.00.15 x 29.00.15 x 2.50.2mm Weight: approx. 4.9g Temperature Range Normal operation: -35C ~ +75C Restricted operation: -40C ~ -35C and +75C ~ +85C 2) Storage temperature: -45C ~ +90C Firmware Upgrade USB interface (by default) or main UART interface. RoHS All hardware components are fully compliant with EU RoHS directive. NOTE 2) . When the module works within this restricted temperature range, RF performance might degrade. For example, the frequency error or the phase error would increase. 2.3. Functional Diagram The following figure shows a block diagram of UC20 and illustrates the major functional parts. Power management Baseband DDR+NAND flash Radio frequency Peripheral interface --UART interface --USIM card interface --USB interface --PCM interface --ADC interface --Status indication --Control interface UC20_Hardware_Design Confidential / Released 14 / 82 UMTS/HSPA Module Series UC20 Hardware Design ANT_GNSS RF Switch GSM VBAT_RF RF Switch PCM WAKEUP_IN W_DISABLE# ANT_MAIN UMTS Baseband RF Transceiver GNSS Receiver ANT_DIV DDR RAM/ NAND Flash UART USB SLEEP_IND VBAT_BB VDD_EXT VDD_2V85 PWRKEY Power Management Unit RESET_N ADC USIM Status VRTC 19.2MHz 32kHz Figure 1: Functional Diagram 2.4. Evaluation Board In order to help you to develop applications with UC20, Quectel supplies an evaluation board (EVB), RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to control or test the module. For details, please refer to document [2]. UC20_Hardware_Design Confidential / Released 15 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3 Application Interface 3.1. General Description UC20 is equipped with a 72-pin 1.3mm pitch SMT pads plus 40-pin other pads that connect to cellular application platform. Sub-interfaces included in these pads are described in detail in the following chapters: Power supply UART interface USIM interface USB interface PCM interface ADC interface Status indication UC20_Hardware_Design Confidential / Released 16 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.2. Pin Assignment The following figure shows the pin assignment of the UC20 module. CTS DCD RI STATUS VBAT_BB VBAT_BB VBAT_RF VBAT_RF GND RESERVED 65 64 63 62 61 60 59 58 57 56 55 68 RTS 69 66 RXD 70 67 USB_DP 71 TXD USB_DM DTR USB_VBUS 72 1 GND WAKEUP_IN 54 GND 53 GND 52 GND AP_READY 2 SLEEP_IND 3 W_DISABLE# 4 51 GND NET_MODE 5 50 GND NET_STATUS 6 VDD_EXT 7 GND 8 GND 9 108 103 109 104 110 105 99 100 85 90 95 96 91 86 92 87 49 ANT_MAIN 48 GND 47 ANT_GNSS 46 GND 45 ADC0 44 ADC1 82 79 76 73 USIM_GND 10 DBG_RXD 11 83 80 77 74 84 81 78 75 106 111 88 93 97 101 DBG_TXD 12 43 RESERVED USIM_PRESENCE 13 42 I2C_SDA USIM_VDD 14 41 I2C_SCL USIM_DATA 15 40 RESERVED USIM_CLK 16 39 RESERVED USIM_RST 17 38 RESERVED VRTC 18 37 RESERVED ANT_DIV GND RESERVED 36 RESERVED 35 32 RESERVED VDD_2V85 31 GND RESERVED 30 RESERVED RESERVED ANT 34 29 PCM_CLK* PCM* 33 28 PCM_SYNC* PCM_OUT* 27 PCM_IN* USIM 26 25 AGND 24 22 RESET_N PWRKEY RESERVED 21 UART 89 94 98 102 23 20 GND USB 19 Power 107 112 RESERVED OTHERS Figure 2: Pin Assignment (Top View) NOTES 1. 2. 3. Keep all RESERVED pins and unused pins unconnected. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84 should not be designed in schematic and PCB decal. "*" means PCM function is only supported in Telematics version. UC20_Hardware_Design Confidential / Released 17 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.3. Pin Description The following tables show the UC20's pin definition. Table 3: IO Parameters Definition Type Description IO Bidirectional input/output DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output OD Open drain Table 4: Pin Description Power Supply Pin Name VBAT_BB VBAT_RF Pin No. 59,60 57,58 I/O Description DC Characteristics Comment PI Power supply for module baseband part. Vmax = 4.3V Vmin = 3.3V Vnorm = 3.8V It must be able to provide sufficient current up to 0.8A. Power supply for module RF part. Vmax = 4.3V Vmin = 3.3V Vnorm = 3.8V It must be able to provide sufficient current in a transmitting burst which typically rises to 2.0A. If unused, keep it open. Power supply for PI VRTC 18 IO Power supply for internal RTC circuit. VOmax = 3.25V when VBAT 3.3V. VI = 1.5V~3.25V at IIN = 3uA when VBAT is not applied. VDD_EXT 7 PO Provide 1.8V for Vnorm = 1.8V UC20_Hardware_Design Confidential / Released 18 / 82 UMTS/HSPA Module Series UC20 Hardware Design VDD_2V85 34 GND 8,9,19,36, 46,48,50~ 54,56,72, 85~112 PO external circuit. IOmax = 20mA Provide 2.85V for external circuit. Vnorm = 2.85V IOmax = 100mA external GPIO's pull up circuits. Reserved for future application. If unused, keep it open. Ground. Turn On/Off Pin Name PWRKEY RESET_N Pin No. Description DC Characteristics Comment Turn on/off the module. RPU 200k VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally. DI Reset the module. RPU 200k VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally. Active low. If unused, keep it open. I/O Description DC Characteristics Comment OD Indicate the module operating status. DO Indicate the module network registration mode. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. If unused, keep it open. DO Indicate the module network activity status. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. If unused, keep it open. 3 DO Indicate the sleep status. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. If unused, keep it open. Pin No. I/O Description DC Characteristics Comment USB detection. Vmax = 5.25V Vmin = 3.0V Vnorm = 5.0V 21 20 I/O DI Status Indication Pin Name STATUS NET_MODE NET_ STATUS SLEEP_IND Pin No. 61 5 6 Require external pull-up. If unused, keep it open. USB Interface Pin Name USB_VBUS 71 UC20_Hardware_Design PI Confidential / Released 19 / 82 UMTS/HSPA Module Series UC20 Hardware Design USB_DP USB_DM 69 70 IO USB differential data bus. Compliant with USB 2.0 standard specification. Require differential impedance of 90. IO USB differential data bus. Compliant with USB 2.0 standard specification. Require differential impedance of 90. I/O Description DC Characteristics Comment USIM Interface Pin Name Pin No. USIM_GND 10 Specified ground for USIM card. For 1.8V USIM: Vmax = 1.9V Vmin = 1.7V USIM_VDD USIM_DATA USIM_CLK USIM_RST 14 15 16 17 PO IO DO DO Power supply for USIM card. Data signal of USIM card. Clock signal of USIM card. Reset signal of USIM card. For 3.0V USIM: Vmax = 3.05V Vmin = 2.7V IOmax = 50mA For 1.8V USIM: VILmax = 0.6V VIHmin = 1.2V VOLmax = 0.45V VOHmin = 1.35V For 3.0V USIM: VILmax = 1.0V VIHmin = 1.95V VOLmax = 0.45V VOHmin = 2.55V Either 1.8V or 3V is supported by the module automatically. Pull-up to USIM_VDD with 15k resistor internally. For 1.8V USIM: VOLmax = 0.45V VOHmin = 1.35V For 3.0V USIM: VOLmax = 0.45V VOHmin = 2.55V For 1.8V USIM: VOLmax = 0.45V VOHmin = 1.35V For 3.0V USIM: VOLmax = 0.45V UC20_Hardware_Design Confidential / Released 20 / 82 UMTS/HSPA Module Series UC20 Hardware Design VOHmin = 2.55V USIM_PRE SENCE VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. If unused, keep it open. 13 DI USIM card insertion detection. Pin No. I/O Description DC Characteristics Comment AI General purpose analog to digital converter. Voltage range: 0.2V to 2.1V If unused, keep it open. AI General purpose analog to digital converter. Voltage range: 0.2V to 4.2V If unused, keep it open. I/O Description DC Characteristics Comment DO Ring indicator. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. DO Data carrier detection. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. Clear to send. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. Request to send. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. If unused, keep it open. Data terminal ready, sleep mode control. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. Transmit data. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. Receive data. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V 1.8V power domain. If unused, keep it open. ADC Interface Pin Name ADC0 ADC1 45 44 Main UART Interface Pin Name RI DCD CTS RTS DTR TXD RXD Pin No. 62 63 64 65 66 67 68 UC20_Hardware_Design DO DI DI DO DI Confidential / Released 21 / 82 UMTS/HSPA Module Series UC20 Hardware Design VIHmax = 2.0V Debug UART Interface Pin Name DBG_TXD Pin No. 12 I/O DO Description DC Characteristics Comment Transmit data. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. 11 DI Receive data. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V Pin Name Pin No. I/O Description DC Characteristics Comment ANT_DIV 35 AI Diversity antenna. 50 impedance If unused, keep it open. ANT_MAIN 49 IO Main antenna. 50 impedance ANT_GNSS 47 AI GNSS antenna. 50 impedance If unused, keep it open. Pin No. I/O Description DC Characteristics Comment 1.8V power domain. If unused, keep it open. DBG_RXD RF Interface PCM Interface Pin Name PCM_IN 24 DI PCM data input. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V PCM_OUT 25 DO PCM data output. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. If unused, keep it open. PCM data frame sync signal. VOLmax = 0.45V VOHmin = 1.35V VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. If unused, keep it open. PCM data bit clock. VOLmax = 0.45V VOHmin = 1.35V VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. In master mode, it's an output signal. In slave mode, it is an input signal. If unused, keep it open. PCM_SYNC PCM_CLK 26 27 UC20_Hardware_Design IO IO Confidential / Released 22 / 82 UMTS/HSPA Module Series UC20 Hardware Design AGND 22 Reserved for analog ground. Ground. If unused, connect this pin to ground. Description DC Characteristics Comment I2C Interface Pin Name I2C_SCL I2C_SDA Pin No. 41 42 I/O I2C serial clock. External pull-up resistor is required. 1.8V only. If unused, keep it open. OD I2C serial data. External pull-up resistor is required. 1.8V only. If unused, keep it open. I/O Description DC Characteristics Comment Sleep mode control. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. 1.8V power domain. Pull-up by default. In low level voltage, module can enter into airplane mode. If unused, keep it open. OD Other Pins Pin Name WAKEUP_IN W_DISABLE# AP_READY Pin No. 1 4 2 DI DI Airplane mode control. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V DI Application processor sleep state detection. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. If unused, keep it open. I/O Description DC Characteristics Comment RESERVED Pins Pin Name Pin No. RESERVED 23,28~33 ,37~40, 43,55,73 ~84 UC20_Hardware_Design Keep these pins unconnected. Reserved Confidential / Released 23 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.4. Operating Modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 5: Overview of Operating Modes Mode Details GSM Idle Software is active. The module has registered to the GSM network and is ready to send and receive data. GSM Talk/Data GSM connection is ongoing. In this mode, the power consumption is decided by the configuration of power control level (PCL), dynamic DTX control and the working RF band. GPRS Idle The module is ready for GPRS data transfer, but no data transfer is going on. In this case, power consumption depends on network setting and GPRS configuration. GPRS Data There is GPRS data in transfer (PPP, TCP or UDP). In this mode, power consumption is decided by the PCL, working RF band and GPRS multi-slot configuration. EDGE Idle The module is ready for data transfer in EDGE mode, but no data is currently sent or received. In this case, power consumption depends on network settings and EDGE configuration. EDGE Data There is EDGE data in transfer (PPP, TCP or UDP). In this mode, power consumption is decided by the PCL, working RF band and EDGE multi-slot configuration. UMTS Idle Software is active. The module has registered to the UMTS network and the module is ready to send and receive data. UMTS Talk/Data UMTS connection is ongoing. In this mode, the power consumption is decided by network setting (e.g. TPC pattern) and data transfer rate. HSPA Idle Software is active. The module has registered to the HSPA network and the module is ready to send and receive data. HSPA Data HSPA data transfer is ongoing. In this mode, the power consumption is decided by network setting (e.g. TPC pattern) and data transfer rate. Normal Operation Minimum Functionality Mode AT+CFUN command can set the module entering into a minimum functionality mode without removing the power supply. In this case, both RF function and USIM card will be invalid. Airplane Mode AT+CFUN command and W_DISABLE# pin can set the module entering into airplane mode. In this case, RF function will be invalid. UC20_Hardware_Design Confidential / Released 24 / 82 UMTS/HSPA Module Series UC20 Hardware Design Sleep Mode In this mode, the current consumption of the module will be reduced to the minimal level. During this mode, the module can still receive paging message, SMS, voice call and TCP/UDP data from the network normally. Power Down Mode In this mode, the power management unit shuts down the power supply. Only the power supply for RTC remains. Software is not active. The serial interface is not accessible. Operating voltage (connected to VBAT_RF and VBAT_BB) remains applied. 3.5. Power Saving 3.5.1. Sleep Mode UC20 is able to reduce its current consumption to a minimum value during the sleep mode. The following section describes UC20's power saving procedure. 3.5.1.1. UART Application If application processor communicates with module via UART interface, the following preconditions can let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Drive DTR to high level. The following figure shows the connection between the module and application processor. Processor Module RXD TXD TXD RXD RI EINT DTR GPIO AP_READY GPIO GND GND Figure 3: UART Sleep Application The RI of module is used to wake up the processor, and AP_READY will detect the sleep state of processor (can be configured to high level or low level detection). You should pay attention to the level UC20_Hardware_Design Confidential / Released 25 / 82 UMTS/HSPA Module Series UC20 Hardware Design match shown in dotted line between module and processor. Driving DTR to low level will wake up the module. 3.5.1.2. USB Application with Suspend Function If application processor communicates with module via USB interface, and processor supports USB suspend function, the following preconditions can let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. The processor's USB bus which is connected with the module USB interface enters into suspended state. The following figure shows the connection between the module and processor. Processor Module VDD USB_VBUS USB_DP USB_DP USB_DM USB_DM AP_READY GPIO RI EINT GND GND Figure 4: USB Application with Suspend Function When the processor's USB bus returns to resume state, the module will be woken up. 3.5.1.3. USB Application without Suspend Function If application processor communicates with module via USB interface, and processor does not support USB suspend function, you should disconnect USB_VBUS with additional control circuit to let the module enter into sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Disconnect USB_VBUS. UC20_Hardware_Design Confidential / Released 26 / 82 UMTS/HSPA Module Series UC20 Hardware Design The following figure shows the connection between the module and application processor. Module Processor GPIO USB_VBUS Power Switch VDD USB_DP USB_DP USB_DM USB_DM RI EINT AP_READY GPIO GND GND Figure 5: USB Sleep Application without Suspend Function Supply power to USB_VBUS will wake up the module. In sleep mode, module can still receive paging, SMS, voice call and TCP/UDP data from network, but the UART port is not accessible. When the module enters into the sleep mode, the SLEEP_IND will output a high logic level. For more details about power saving mode, please refer to document [8]. 3.5.2. Airplane Mode When module enters into the airplane mode, the RF function does not work, and all AT commands correlative with RF function will be not accessible. This mode can be set with the following way. Hardware: The W_DISABLE# pin is pulled up by default, drive it to low level will let the module enter into airplane mode. Software: Command AT+CFUN provides the choice of the functionality level <fun>=0, 1, 4. AT+CFUN=0: Minimum functionality mode, both USIM and RF function are disabled. AT+CFUN=1: Full functionality mode (by default). AT+CFUN=4: Airplane mode. RF function is disabled. UC20_Hardware_Design Confidential / Released 27 / 82 UMTS/HSPA Module Series UC20 Hardware Design NOTES 1. The W_DISABLE# control function is disabled in firmware by default. It can be enabled by AT command AT+QCFG="airplanecontrol". Refer to document [1]. 2. When the module is in sleep mode, the W_DISABLE# control is invalid. Please be sure to wake the module up first. 3. GNSS function is still available when RF function is disabled. 3.6. Power Supply 3.6.1. Power Supply Pins UC20 provides four VBAT pins dedicated to connect with the external power supply. There are two separate voltage domains for VBAT. VBAT_RF with two pads for module RF part. VBAT_BB with two pads for module baseband part. The following table shows the VBAT pins and ground pins. Table 6: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT_RF 57,58 Power supply for module RF part. 3.3 3.8 4.3 V VBAT_BB 59,60 Power supply for module baseband part. 3.3 3.8 4.3 V GND 8,9,19,36,46, 48,50~54,56, 72, 85~112 Ground. - 0 - V 3.6.2. Decrease Voltage Drop The power supply range of the module is 3.3V ~ 4.3V. Make sure the input voltage will never drop below 3.3V. If the voltage drops below 3.3V, the module will turn off automatically. The following figure shows the voltage drop during transmitting burst in 2G network, the voltage drop will be less in 3G network. UC20_Hardware_Design Confidential / Released 28 / 82 UMTS/HSPA Module Series UC20 Hardware Design burst burst 2.0A Current VBAT < 400mV Min. 3.3V Figure 6: Voltage Drop during Transmitting Burst To decrease voltage drop, a bypass capacitor of about 100F with low ESR should be used. Multi-layer ceramic chip (MLCC) capacitor can provide the best combination of low ESR. The main power supply from an external application has to be a single voltage source and expanded to two sub paths with star structure. The width of VBAT_BB trace should be no less than 1mm, and the width of VBAT_RF trace should be no less than 2mm, and the principle of the VBAT trace is the longer, the wider. Three ceramic capacitors (100nF, 33pF, 10pF) are recommended to be applied to the VBAT pins. The capacitors should be placed close to the UC20's VBAT pins. In addition, in order to get a stable power source, it is suggested to use a zener diode of which reverse zener voltage is 5.1V and dissipation power is more than 0.5W. The following figure shows star structure of the power supply. VBAT VBAT_RF VBAT_BB + + D1 5.1V C1 100uF C2 C3 C4 100nF 33pF 10pF C5 100uF C6 C7 C8 100nF 33pF 10pF Module Figure 7: Star Structure of the Power Supply 3.6.3. Reference Design for Power Supply The power design for the module is very important, since the performance of power supply for the module largely depends on the power source. The power supply is capable of providing the sufficient current up to UC20_Hardware_Design Confidential / Released 29 / 82 UMTS/HSPA Module Series UC20 Hardware Design 2A at least. If the voltage drop between the input and output is not too high, it is suggested to use a LDO to supply power for module. If there is a big voltage difference between the input source and the desired output (VBAT), a buck converter is preferred to be used as a power supply. The following figure shows a reference design for +5V input power source. The designed output for the power supply is about 3.8V and the maximum load current is 3A. MIC29302WU U1 DC_IN VBAT 470uF 5 ADJ GND OUT 4 3 C1 1 R1 51K EN 2 IN C2 R2 100K 1% R3 47K 1% 100nF R4 470R C4 C3 470uF 100nF Figure 8: Reference Circuit of Power Supply 3.6.4. Monitor the Power Supply You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please refer to document [1]. 3.7. Turn on and off Scenarios 3.7.1. Turn on Module Using the PWRKEY The following table shows the pin definition of PWRKEY. Table 7: PWRKEY Pin Description Pin Name PWRKEY Pin No. 21 Description DC Characteristics Comment Turn on/off the module. VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally with 200k resistor. When UC20 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a low level at least 100ms. It is recommended to use an open drain/collector driver to control the PWRKEY. After STATUS pin (require external pull-up) outputting a low level, PWRKEY pin can be released. A simple UC20_Hardware_Design Confidential / Released 30 / 82 UMTS/HSPA Module Series UC20 Hardware Design reference circuit is illustrated in the following figure. PWRKEY 100ms 4.7K Turn on pulse 47K Figure 9: Turn on the Module Using Driving Circuit The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate from finger. A reference circuit is showed in the following figure. S1 PWRKEY TVS Close to S1 Figure 10: Turn on the Module Using Keystroke The turn on scenarios is illustrated as the following figure. UC20_Hardware_Design Confidential / Released 31 / 82 UMTS/HSPA Module Series UC20 Hardware Design 1 VBAT 100ms VIH 1.3V PWRKEY VIL 0.5V RESET_N 1.3 ~ 1.9s STATUS (OD) 5s UART Inactive Active 5s USB Inactive Active Figure 11: Timing of Turning on Module NOTE Make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is recommended to be 30ms. 3.7.2. Turn off Module The following procedures can be used to turn off the module: Normal power down procedure: Turn off the module using the PWRKEY pin. Normal power down procedure: Turn off the module using command AT+QPOWD. Automatic shutdown: Turn off the module automatically if under-voltage or over-voltage is detected. 3.7.2.1. Turn off Module Using the PWRKEY Pin Driving the PWRKEY to a low level voltage at least 0.6s, the module will execute power-down procedure after PWRKEY is released. The power-down scenario is illustrated as the following figure. UC20_Hardware_Design Confidential / Released 32 / 82 UMTS/HSPA Module Series UC20 Hardware Design VBAT 0.6s Log off network about 1s to 60s PWRKEY STATUS (OD) Module Status Power-down procedure RUNNING OFF Figure 12: Timing of Turning off Module During power-down procedure, module will send out URC "NORMAL POWER DOWN" via URC port first, then log off network and save important data. After logging off, module sends out "POWERED DOWN" and shut down the internal power supply. The power on VBAT pins is not allowed to turn off before the URC "POWERED DOWN" is output to avoid data loss. If logging off is not done within 60s, module will shut down internal power supply forcibly. After that moment, the module enters the power down mode, no other AT commands can be executed and only the RTC is still active. 3.7.2.2. Turn off Module Using AT Command It is also a safe way to use AT command AT+QPOWD to turn off the module, which is similar to turning off the module via PWRKEY Pin. Please refer to document [1] for details about the AT command of AT+QPOWD. 3.7.2.3. Automatic Shutdown The module will constantly monitor the voltage applied on the VBAT, if the voltage 3.5V, the following URC will be presented: +QIND: "vbatt",-1 If the voltage 4.21V, the following URC will be presented: +QIND: "vbatt",1 UC20_Hardware_Design Confidential / Released 33 / 82 UMTS/HSPA Module Series UC20 Hardware Design The uncritical voltage is 3.3V to 4.35V, If the voltage > 4.35V or < 3.3V the module would automatically shut down itself. If the voltage < 3.3V, the following URC will be presented: +QIND: "vbatt",-2 If the voltage > 4.35V, the following URC will be presented: +QIND: "vbatt",2 NOTE The value of voltage threshold can be revised by command AT+QCFG="vbatt", refer to document [1] for details. 3.8. Reset the Module The RESET_N can be used to reset the module. Table 8: RESET_N Pin Description Pin Name RESET_N Pin No. 20 Description DC Characteristics Comment Reset the module. VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally with 200k resistor. Active low. You can reset the module by driving the RESET_N to a low level voltage for more than 150ms and then releasing. The recommended circuit is similar to the PWRKEY control circuit. You can use open drain/collector driver or button to control the RESET_N. UC20_Hardware_Design Confidential / Released 34 / 82 UMTS/HSPA Module Series UC20 Hardware Design RESET_N 150ms 4.7K Reset pulse 47K Figure 13: Reference Circuit of RESET_N by Using Driving Circuit S2 RESET_N TVS Close to S2 Figure 14: Reference Circuit of RESET_N by Using Button The reset scenario is illustrated as the following figure. VBAT 5s 150ms VIH 1.3V RESET_N VIL 0.5V Module Status RUNNING RESETTING RUNNING Figure 15: Timing of Resetting Module NOTE Use the RESET_N only when turning off the module by the command AT+QPOWD and the PWRKEY pin failed. UC20_Hardware_Design Confidential / Released 35 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.9. RTC Backup The RTC (Real Time Clock) can be powered by an external power source through the pin VRTC when the module is powered down and there is no power supply for the VBAT. It is also available to charge the battery on the VRTC when module is turned on. You can choose rechargeable battery, capacitor or non-rechargeable battery depending on different applications. The following figures show the various sample circuits for VRTC backup. VRTC R RTC Core Non-chargeable Battery Module Figure 16: RTC Supply from Non-chargeable Battery VRTC R RTC Core Rechargeable Battery Module Figure 17: RTC Supply from Rechargeable Battery UC20_Hardware_Design Confidential / Released 36 / 82 UMTS/HSPA Module Series UC20 Hardware Design VRTC R RTC Core Large Capacitance Capacitor Module Figure 18: RTC Supply from Capacitor 3.10. UART Interface The module provides two UART interfaces: main UART interface and debug UART interface. The following shows the different features. Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps baud rate, the default is 115200bps. This interface can be used for data transmission, AT communication or firmware upgrade. Debug UART interface supports 115200bps. It can be used for GNSS NMEA sentences output. NOTE USB interface supports software debug and firmware upgrade by default. The module is designed as the DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. The following tables show the pin definition of these two UART interfaces. Table 9: Pin Definition of the Main UART Interface Pin Name Pin No. I/O Description Comment RI 62 DO Ring indicator. 1.8V power domain. DCD 63 DO Data carrier detection. 1.8V power domain. CTS 64 DO Clear to send. 1.8V power domain. UC20_Hardware_Design Confidential / Released 37 / 82 UMTS/HSPA Module Series UC20 Hardware Design RTS 65 DI Request to send. 1.8V power domain. DTR 66 DI Data terminal ready. 1.8V power domain. TXD 67 DO Transmit data. 1.8V power domain. RXD 68 DI Receive data. 1.8V power domain. Table 10: Pin Definition of the Debug UART Interface Pin Name Pin No. I/O Description Comment DBG_TXD 12 DO Transmit data. 1.8V power domain. DBG_RXD 11 DI Receive data. 1.8V power domain. The logic levels are described in the following table. Table 11: Logic Levels of Digital I/O Parameter Min Max Unit VIL -0.3 0.6 V VIH 1.2 2.0 V VOL 0 0.45 V VOH 1.35 1.8 V UC20 provides 1.8V UART interface. A level translator should be used if your application is equipped with a 3.3V UART interface. A level translator TXS0108PWR provided by Texas Instrument is recommended. The following figure shows the reference design. UC20_Hardware_Design Confidential / Released 38 / 82 UMTS/HSPA Module Series UC20 Hardware Design VDD_EXT VCCA VCCB VDD_3.3V 0.1uF 0.1uF OE GND RI A1 B1 RI_3.3V DCD A2 B2 DCD_3.3V CTS A3 B3 CTS_3.3V RTS A4 B4 RTS_3.3V DTR A5 B5 DTR_3.3V TXD A6 B6 TXD_3.3V A7 B7 RXD 51K Translator A8 RXD_3.3V 51K B8 Figure 19: Reference Circuit with Translator Chip Please visit http://www.ti.com for more information. Another example with transistor translation circuit is shown as below. The construction of dotted line can refer to the construction of solid line. Please pay attention to direction of connection. Input dotted line of module should refer to input solid line of the module. Output dotted line of module should refer to output solid line of the module. 4.7K VDD_EXT VDD_EXT 1nF MCU/ARM 4.7K Module RXD /TXD /RXD TXD 4.7K VCC_MCU 1nF VDD_EXT 4.7K /RTS /CTS GPIO EINT GPIO GND RTS CTS DTR RI DCD GND Figure 20: Reference Circuit with Transistor Circuit The following figure is an example of connection between UC20 and PC. A voltage level translator and a RS-232 level translator chip must be inserted between module and PC, since these two UART interfaces do not support the RS-232 level, while support the 1.8V CMOS level only. UC20_Hardware_Design Confidential / Released 39 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.3V OE VCCB VCC GND DCD TXD CTS RI DCD_1.8V TXD_1.8V DCD_3.3V TXD_3.3V DIN1 DIN2 DOUT1 DOUT2 CTS_1.8V RI_1.8V CTS_3.3V RI_3.3V DOUT3 DOUT4 DOUT5 RXD DTR RTS GND RXD_1.8V DTR_1.8V RTS_1.8V GND RXD_3.3V DTR_3.3V RTS_3.3V DIN3 DIN4 DIN5 R1OUTB ROUT1 ROUT2 ROUT3 5 GND 1 DCD 2 RXD 8 CTS 9 RI 6 DSR RIN1 RIN2 RIN3 3 TXD 4 DTR 7 RTS VDD_EXT VCCA 3.3V Module FORCEON /FORCEOFF TXS0108PWR /INVALID SN65C3238 DB-9 Connect to PC Figure 21: RS232 Level Match Circuit NOTES 1. 2. 3. The module disables the hardware flow control by default. When hardware flow control is required, RTS and CTS should be connected to the host. AT command AT+IFC=2,2 is used to enable hardware flow control. AT command AT+IFC=0,0 is used to disable the hardware flow control. For more details, please refer to document [1]. Rising edge on DTR will let the module exit from the data mode by default. It can be disabled by AT commands. Refer to document [1] about the command AT&D and AT&V for details. DCD is used as data mode indication. Refer to document [1] about the command AT&C and AT&V for details. 3.11. USIM Card Interface The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and 3.0V USIM cards are supported. Table 12: Pin Definition of the USIM Interface Pin Name Pin No. I/O Description Comment USIM_VDD 14 PO Power supply for USIM card. Either 1.8V or 3.0V is supported by the module automatically. USIM_DATA 15 IO Data signal of USIM card. Pull-up to USIM_VDD with 15k resistor internally. UC20_Hardware_Design Confidential / Released 40 / 82 UMTS/HSPA Module Series UC20 Hardware Design USIM_CLK 16 DO Clock signal of USIM card. USIM_RST 17 DO Reset signal of USIM card. USIM_PRES ENCE 13 DI USIM card insertion detection. USIM_GND 10 1.8V power domain. Specified ground for USIM card. The following figure shows the reference design of the 8-pin USIM card. VDD_EXT USIM_VDD 51K 15K 100nF USIM_GND Module USIM_VDD USIM_RST 22R USIM_CLK USIM_PRESENCE 22R USIM_DATA 22R USIM Connector VCC RST CLK 33pF GND 33pF 33pF GND GND VPP IO GND Figure 22: Reference Circuit of the 8 Pin USIM Card NOTE Some AT commands are invalid when USIM card is not applied. UC20 supports USIM card hot-plugging via the USIM_PRESENCE pin. For details, refer to document [1] about the command AT+QSIMDET. If you do not need the USIM card detection function, keep USIM_PRESENCE unconnected. The reference circuit for using a 6-pin USIM card connector is illustrated as the following figure. UC20_Hardware_Design Confidential / Released 41 / 82 UMTS/HSPA Module Series UC20 Hardware Design USIM_VDD 15K 100nF USIM_GND Module USIM_VDD USIM_RST USIM_CLK USIM_DATA USIM Connector VCC RST CLK 22R GND VPP IO 22R 22R 33pF 33pF 33pF GND GND Figure 23: Reference Circuit of the 6 Pin USIM Card In order to enhance the reliability and availability of the USIM card in your application, please follow the following criterion in the USIM circuit design: Keep layout of USIM card as close as possible to the module. Assure the length of the trace is less than 200mm. Keep USIM card signal away from RF and VBAT alignment. Assure the ground between module and USIM connector short and wide. Keep the width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential. The decouple capacitor of USIM_VDD should be less than 1uF and must be near to USIM connector. To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away with each other and shield them with surrounded ground. In order to offer good ESD protection, it is recommended to add TVS. The 22 resistors should be added in series between the module and the USIM card so as to suppress the EMI spurious transmission and enhance the ESD protection. The 33pF capacitors are used for filtering interference of EGSM900. Please note that the USIM peripheral circuit should be close to the USIM connector. The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace and sensitive occasion is applied, and should be placed close to the USIM connector. UC20_Hardware_Design Confidential / Released 42 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.12. USB Interface UC20 contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0 specification and supports high speed (480 Mbps), full speed (12 Mbps) and low speed (1.5 Mbps) mode. The USB interface is primarily used for AT command, data transmission, GNSS NMEA sentences output, software debug and firmware upgrade. The following table shows the pin definition of USB interface. Table 13: USB Pin Description Pin Name Pin No. I/O Description Comment USB_DP 69 IO USB differential data bus (positive). Require differential impedance of 90. USB_DM 70 IO USB differential data bus (minus). Require differential impedance of 90. USB_VBUS 71 PI Used for detecting the USB interface connected. 3.0~5.25V. Typical 5.0V. GND 72 Ground. More details about the USB 2.0 specifications, please visit http://www.usb.org/home. The following figure shows the reference circuit of USB interface. Close to USB connector USB_VBUS USB_VBUS NM_2pF USB_DM USB_DP USB_DM USB_DP Differential layout ESD Array GND GND Module USB connector Figure 24: Reference Circuit of USB Application In order to ensure the USB interface design corresponding with the USB 2.0 specification, please comply with the following principles. UC20_Hardware_Design Confidential / Released 43 / 82 UMTS/HSPA Module Series UC20 Hardware Design It is important to route the USB signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90ohm. Do not route signal traces under crystals, oscillators, magnetic devices and RF signal traces. It is important to route the USB differential traces in inner-layer with ground shielding not only upper and lower layer but also right and left side. Pay attention to the influence of junction capacitance of ESD component on USB data lines. Typically, the capacitance value should be less than 2pF. Keep the ESD components as closer to the USB connector as possible. NOTE UC20 module can only be used as a slave device. The USB interface is recommended to be reserved for firmware upgrade in your design. The following figure shows the recommended test points. Module USB_VBUS Connector USB_VBUS USB_DM USB_DM USB_DP USB_DP VBAT_BB VBAT VBAT_RF PWRKEY GND PWRKEY GND Figure 25: Test Points of Firmware Upgrade 3.13. PCM and I2C Interface UC20 provides one Pulse Code Modulation (PCM) digital interface for audio design, which supports the following modes: Primary mode (short sync, works as both master and slave) Auxiliary mode (long sync, works as master only) UC20_Hardware_Design Confidential / Released 44 / 82 UMTS/HSPA Module Series UC20 Hardware Design In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; the PCM_SYNC falling edge represents the MSB. In this mode, PCM_CLK supports 128, 256, 512, 1024, 2048 and 4096kHz for different speech codec. In auxiliary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; while the PCM_SYNC rising edge represents the MSB. In this mode, PCM interface operates with a 128kHz PCM_CLK and an 8kHz, 50% duty cycle PCM_SYNC only. UC20 supports 8-bit A-law and -law, and also 16-bit linear data formats. The following figures show the primary mode's timing relationship with 8kHz PCM_SYNC and 2048kHz PCM_CLK and auxiliary mode's timing relationship with 8kHz PCM_SYNC and 128kHz PCM_CLK. 125us PCM_CLK 1 2 255 256 PCM_SYNC MSB MSB LSB PCM_OUT LSB MSB MSB PCM_IN Figure 26: Primary Mode Timing 125us PCM_CLK 1 2 15 16 PCM_SYNC MSB LSB PCM_OUT MSB LSB PCM_IN Figure 27: Auxiliary Mode Timing UC20_Hardware_Design Confidential / Released 45 / 82 UMTS/HSPA Module Series UC20 Hardware Design The following table shows the pin definition of PCM and I2C interface which can be applied on audio codec design. Table 14: Pin Definition of PCM and I2C Interface Pin Name Pin No. I/O Description Comment PCM_IN 24 DI PCM data input. 1.8V power domain. PCM_OUT 25 DO PCM data output. 1.8V power domain. PCM_SYNC 26 IO PCM data frame sync signal. 1.8V power domain. PCM_CLK 27 IO PCM data bit clock. 1.8V power domain. I2C_SCL 41 OD I2C serial clock. Require external pull-up resistor. 1.8V only. I2C_SDA 42 OD I2C serial data. Require external pull-up resistor. 1.8V only. Clock and mode can be configured by AT command, and the default configuration is master mode using short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, UC20's firmware has integrated the configuration on NAU8814 application with I2C interface. Refer to document [1] about the command AT+QDAI for details. The following figure shows the reference design of PCM interface with external codec IC. PCM_CLK MIC+ MIC- BCLK PCM_SYNC FS PCM_OUT BIAS MIC_BIAS MCLK DACIN PCM_IN ADCOUT I2C_SCL SCLK I2C_SDA SDIN Module 4.7K 4.7K SPKOUT+ SPKOUT- NAU8814 1.8V Figure 28: Reference Circuit of PCM Application with Audio Codec UC20_Hardware_Design Confidential / Released 46 / 82 UMTS/HSPA Module Series UC20 Hardware Design NOTES 1. 2. It is recommended to reserved RC (R=22, C=22pF) circuit on the PCM lines, especially for PCM_CLK. UC20 works as a master device pertaining to I2C interface. 3.14. ADC Function The module provides two analog-to-digital converters (ADC) to digitize the analog signal to 15-bit digital data such as battery voltage, temperature and so on. Using AT command AT+QADC=0 can read the voltage value on ADC0 pin. Using AT command AT+QADC=1 can read the voltage value on ADC1 pin. For more details of these AT commands, please refer to document [1]. In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground. Table 15: Pin Definition of the ADC Pin Name Pin No. Description ADC0 45 General purpose analog to digital converter. ADC1 44 General purpose analog to digital converter. The following table describes the characteristic of the ADC function. Table 16: Characteristic of the ADC Parameter Min. ADC0 Voltage Range ADC1 Voltage Range Typ. Max. Unit 0.2 2.1 V 0.2 4.2 V ADC Resolution 15 bits Offset Error 3.5 % Gain Error 2.5 % UC20_Hardware_Design Confidential / Released 47 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.15. Network Status Indication The network indication pins can be used to drive a network status indicator LED. The module provides two pins which are NET_MODE and NET_STATUS. The following tables describe pin definition and logic level changes in different network status. Table 17: Pin Definition of Network Indicator Pin Name Pin No. I/O Description Comment NET_MODE 5 DO Indicate the module network registration mode. 1.8V power domain NET_STATUS 6 DO Indicate the module network activity status. 1.8V power domain Table 18: Working State of the Network Indicator Pin Name Status Description Always High Registered in 3G network Always Low Others Flicker slowly (200ms High/1800ms Low) Network searching Flicker slowly (1800ms High/200ms Low) Idle Flicker quickly (125ms High/125ms Low) Data transfer is ongoing Always High Voice calling NET_MODE NET_STATUS A reference circuit is shown in the following figure. VBAT Module 2.2K Network Indicator 4.7K 47K Figure 29: Reference Circuit of the Network Indicator UC20_Hardware_Design Confidential / Released 48 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.16. Operating Status Indication 3.16.1. STATUS The STATUS pin is an open drain output for indicating the module operation status. You can connect it to a GPIO of DTE with pulled up, or as LED indication circuit as below. When the module is turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present high-impedance state. Table 19: Pin Definition of STATUS Pin Name STATUS Pin No. 61 I/O Description Comment OD Indicate the module operation status. Require external pull-up. The following figure shows different design circuit of STATUS, you can choose either one according to your application demands. VBAT VDD_MCU 10K 2.2K STATUS Module MCU_GPIO STATUS Module Figure 30: Reference Circuit of the STATUS 3.16.2. SLEEP_IND The SLEEP_IND is an indicated pin for judging whether the module is in sleep mode or not. When the module enters into the sleep mode, the SLEEP_IND will output a logic high level. So you can use the SLEEP_IND for low current indication. The following table shows the pin definition of SLEEP_IND. UC20_Hardware_Design Confidential / Released 49 / 82 UMTS/HSPA Module Series UC20 Hardware Design Table 20: Pin Definition of SLEEP_IND Pin Name SLEEP_IND Pin No. I/O 3 DO Description Comment Indicate the sleep status. 1.8V power domain. Outputs high level when the module is in sleep mode. A reference circuit is shown in the following figure. VBAT Module 2.2K 4.7K SLEEP_IND 47K Figure 31: Reference Circuit of the SLEEP_IND Module still periodically monitors the paging channel of the current base station (paging block reception) during the sleep mode. When the module monitors the paging channel, it wakes up to active mode, to enable the reception of paging block. In between, the module switches to sleep mode. The following figure shows the paging timing cycle (T) during sleep mode. Sleep Sleep Sleep T SLEEP_IND Paging Sleep T Paging Paging Figure 32: Relationship between Sleep and Network Paging UC20_Hardware_Design Confidential / Released 50 / 82 UMTS/HSPA Module Series UC20 Hardware Design As to GSM network, the paging period time can be calculated with the following formula. T= 4.615ms x 51 x DRX As to WCDMA network, the paging period time can be calculated with the following formula. T= 10ms x 2DRX DRX (Discontinuous Reception) is a value from 2 to 9 in GSM network, resulting in paging intervals 470.6ms to 2118.42ms, and a value from 6 to 9 in WCDMA network, resulting in paging intervals from 640ms to 5120ms. 3.17. Behavior of the RI You can use command AT+QCFG="risignaltype", "physical" to configure RI behavior: No matter which port URC is presented on, URC will trigger the behavior on RI pin. NOTE URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG. The default port is USB AT port. In additional, RI behavior can be configured flexible. The default behavior of the RI is shown as below. Table 21: Behavior of the RI State Response Idle RI keeps high level. URC RI outputs 120ms low pulse when new URC returns. The RI behavior can be changed by command AT+QCFG="urc/ri/ring", refer to document [1] for details. UC20_Hardware_Design Confidential / Released 51 / 82 UMTS/HSPA Module Series UC20 Hardware Design 4 GNSS Receiver 4.1. General Description UC20 includes a fully integrated global navigation satellite system solution that supports the latest generation gpsOne Gen8 of Qualcomm (GPS and GLONASS). Compared with GPS only, dual systems increase usable constellation, reduce coverage gaps and TTFF, and increase positioning accuracy, especially in rough urban environments. UC20 works in standalone mode, allows device to demodulate GNSS assistance data, calculate position without any assistance from the network, suitable for various application needing lowest-cost, accurate position determination. UC20 supports Qualcomm gpsOneXTRA technology (one kind of A-GNSS), which will download XTRA file from the internet server to enhance the TTFF. XTRA file contains predicted GPS and GLONASS satellites coordinates and clock biases valid for up to 7days. It is the best if XTRA file is downloaded once every 1-2 days. And UC20 also supports SBAS (including WAAS, EGNOS and MSAS), which will improve fix accuracy. UC20 provides power-saving solution named DPO (Dynamic Power Optimization), which attempts to turn off GNSS RF parts, reduces current consumption by 50% at most without impact on TTFF, thus extends battery life, and maximizes talk and standby time as well. UC20 supports standard NMEA-0183 protocol, and outputs NMEA sentences with 1Hz via USB interface by default. By default, UC20 GNSS engine is switched off, it has to be switched on with AT command. For more details about GNSS engine technology and configurations, refer to document [7]. UC20_Hardware_Design Confidential / Released 52 / 82 UMTS/HSPA Module Series UC20 Hardware Design 4.2. GNSS Performance The following table shows UC20 GNSS performance. Table 22: GNSS Performance Parameter Description Conditions Typ. Unit Autonomous -144 dBm With LNA -147 dBm Autonomous -154 dBm With LNA -159 dBm Autonomous -155 dBm With LNA -161 dBm Autonomous 32 s XTRA enabled 22 s Autonomous 29 s XTRA enabled 3 s Autonomous 2.5 s XTRA enabled 2 s Autonomous @open sky <1.5 m Cold start Sensitivity (GNSS) Reacquisition Tracking Cold start @open sky TTFF (GNSS) Warm start @open sky Hot start @open sky Accuracy (GNSS) CEP-50 NOTES 1. 2. 3. Tracking sensitivity: the lowest GPS signal value at the antenna port for which the module can keep on positioning for 3 minutes. Reacquisition sensitivity: the lowest GPS signal value at the antenna port for which the module can fix position again within 3 minutes after loss of lock. Cold start sensitivity: the lowest GPS signal value at the antenna port for which the module fixes position within 3 minutes after executing cold start command. UC20_Hardware_Design Confidential / Released 53 / 82 UMTS/HSPA Module Series UC20 Hardware Design 4.3. Layout Guideline The following layout guideline should be taken into account in your design. Maximize the distance between the GNSS antenna and the main GSM/UMTS antenna. Noisy digital circuits such as the USIM card, USB interface, Camera module, Display connector and SD card should be away from the antenna. Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar isolation and protection. Keep 50 ohm characteristic impedance of the ANT_GNSS trace. Refer to Chapter 5 for GNSS reference design and antenna consideration. UC20_Hardware_Design Confidential / Released 54 / 82 UMTS/HSPA Module Series UC20 Hardware Design 5 Antenna Interface UC20 antenna interface includes a main GSM/UMTS antenna, an optional UMTS Rx-diversity antenna, which is used to improve UMTS's receiving performance, and a GNSS antenna. The antenna interface has an impedance of 50. 5.1. GSM/UMTS Antenna Interface 5.1.1. Pin Definition The main antenna and UMTS Rx-diversity antenna pins definition are shown below. Table 23: Pin Definition of the RF Antenna Pin Name Pin No. I/O Description Comment ANT_MAIN 49 IO Main antenna 50 impedance ANT_DIV 35 AI Diversity antenna 50 impedance 5.1.2. Operating Frequency Table 24: The Module Operating Frequencies Band Receive Transmit Unit GSM850 869 ~ 894 824 ~ 849 MHz EGSM900 925 ~ 960 880 ~ 915 MHz DCS1800 1805 ~ 1880 1710 ~ 1785 MHz PCS1900 1930 ~ 1990 1850 ~ 1910 MHz UMTS 2100 2110 ~ 2170 1920 ~ 1980 MHz UMTS 1900 1930 ~ 1990 1850 ~ 1910 MHz UC20_Hardware_Design Confidential / Released 55 / 82 UMTS/HSPA Module Series UC20 Hardware Design UMTS 900 925 ~ 960 880 ~ 915 MHz UMTS 850 869 ~ 894 824 ~ 849 MHz UMTS 800 875 ~ 885 830 ~ 840 MHz 5.1.3. Reference Design The reference design of main antenna and UMTS Rx-diversity antenna is shown as below. It should reserve a -type matching circuit for better RF performance. The capacitors are not mounted by default. Main antenna R1 0R ANT_MAIN C1 C2 NM NM Diversity antenna R2 0R ANT_DIV Module C3 C4 NM NM Figure 33: Reference Circuit of Antenna Interface NOTE Keep a proper distance between main antenna and diversity antenna to improve the receiving sensitivity. UC20_Hardware_Design Confidential / Released 56 / 82 UMTS/HSPA Module Series UC20 Hardware Design 5.2. GNSS Antenna Interface The following tables show the GNSS antenna pin definition and frequency specification. Table 25: Pin Definition of GNSS Antenna Pin Name Pin No. I/O Description Comment ANT_GNSS 47 AI GNSS antenna 50 impedance Table 26: GNSS Frequency Type Frequency Unit GPS 1575.421.023 MHz GLONASS 1597.5 ~ 1605.8 MHz 5.2.1. Reference Design for Passive Antenna NM Passive antenna 100pF GND RFOUT GND /SHDN ANT_GNSS MCU_GPIO 6.8nH 51K RFIN D1 56pF NM VDD VCC MAX2659 33pF 220nF Module Figure 34: Reference Circuit of GNSS Passive Antenna UC20_Hardware_Design Confidential / Released 57 / 82 UMTS/HSPA Module Series UC20 Hardware Design 5.2.2. Reference Design for Active Antenna VDD Active antenna 10R 0.1uF 47nH 100pF ANT_GNSS NM NM Module Figure 35: Reference Circuit of GNSS Active Antenna NOTES 1. 2. 3. 4. 5. You can choose the corresponding reference circuit above according to your demands on antenna circuit design. MAX2659 is the recommended LNA chip. You can disable LNA to save power with one GPIO shown in above figure. Pay attention to this pin's voltage level. VDD supplies power for active antenna. You can choose the right VDD according to the requirements for active antenna. This power circuit is not needed if passive antenna is applied here. All NM capacitors are reserved for adjusting RF performance. The capacitance of ESD component D1 should be less than 1pF. 5.3. Antenna Installation 5.3.1. Antenna Requirement The following table shows the requirement on GSM/UMTS antenna and GNSS antenna. UC20_Hardware_Design Confidential / Released 58 / 82 UMTS/HSPA Module Series UC20 Hardware Design Table 27: Antenna Requirements Type Requirements GNSS Frequency range: 1565~1607 MHz Polarization: RHCP or linear VSWR: < 2 (Typ.) Passive antenna gain: > 0dBi Active antenna noise figure: < 1.5dB Active antenna gain: > -2dBi Active antenna embedded LNA gain: 20dB (Typ.) Active antenna total gain: > 18dBi (Typ.) GSM/UMTS VSWR: 2 Gain (dBi): 1 Max Input Power (W): 50 Input Impedance (ohm): 50 Polarization Type: Vertical Cable Insertion Loss: < 1dB (GSM850/900, UMTS800/850/900) Cable Insertion Loss: < 1.5dB (GSM1800/1900, UMTS1900/2100) 5.3.2. Install the Antenna with RF Connector The following figure is the antenna installation with RF connector provided by HIROSE. The recommended RF connector is UF.L-R-SMT. Figure 36: Dimensions of the UF.L-R-SMT Connector (Unit: mm) UC20_Hardware_Design Confidential / Released 59 / 82 UMTS/HSPA Module Series UC20 Hardware Design You can use U.FL-LP serial connector listed in the following figure to match the UF.L-R-SMT. Figure 37: Mechanicals of UF.L-LP Connectors The following figure describes the space factor of mated connector. Figure 38: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com. UC20_Hardware_Design Confidential / Released 60 / 82 UMTS/HSPA Module Series UC20 Hardware Design 6 Electrical, Reliability Characteristics and Radio 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in the following table: Table 28: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT_RF/VBAT_BB -0.3 4.7 V USB_VBUS -0.3 5.5 V Peak Current of VBAT_BB 0 0.8 A Peak Current of VBAT_RF 0 1.8 A Voltage at Digital Pins -0.3 2.3 V Voltage at ADC0 0 2.1 V Voltage at ADC1 0 4.2 V 6.2. Power Supply Ratings Table 29: The Module Power Supply Ratings Parameter Description Conditions Min. Typ. Max. Unit VBAT VBAT_BB and VBAT_RF Voltage must stay within the min/max values, including voltage 3.3 3.8 4.3 V UC20_Hardware_Design Confidential / Released 61 / 82 UMTS/HSPA Module Series UC20 Hardware Design Parameter Description Conditions Min. Typ. Max. Unit 400 mV 1.8 2.0 A 5.0 5.25 V drop, ripple and spikes. Voltage drop during transmitting burst Maximum power control level on GSM850 and EGSM900. IVBAT Peak supply current (during transmission slot) Maximum power control level on GSM850 and EGSM900. USB_VBUS USB detection 3.0 6.3. Operating Temperature The operating temperature is listed in the following table. Table 30: Operating Temperature Parameter Min. Typ. Max. Unit Normal Temperature -35 25 75 C Restricted Operation -40~ -35 75 ~ 85 C Storage Temperature -45 90 C NOTE The maximum surface temperature may be up to 100C when module works at 85C ambient temperature. 6.4. Current Consumption The values of current consumption are shown below. UC20_Hardware_Design Confidential / Released 62 / 82 UMTS/HSPA Module Series UC20 Hardware Design Table 31: The Module Current Consumption Parameter Description Conditions Typ. Unit OFF state supply current Power down 45 uA 3.6 @DRX=2 mA 1.5 @DRX=9 mA 3.7 @DRX=2 mA 1.6 @DRX=9 mA Idle (USB disconnected) 15.0 @DRX=2 mA Idle (USB connected) 32.0 @DRX=2 mA 2.9 @DRX=6 mA 1.1 @DRX=9 mA 3.0 @DRX=6 mA 1.2 @DRX=9 mA Idle (USB disconnected) 15.0 @DRX=6 mA Idle (USB connected) 34.0 @DRX=6 mA GSM850 1DL/1UL PCL=5 260 mA GSM850 4DL/1UL PCL=5 276 mA GSM850 3DL/2UL PCL=5 385 mA GSM850 2DL/3UL PCL=5 483 mA GSM850 1DL/4UL PCL=5 554 mA EGSM900 1DL/1UL PCL=5 275 mA EGSM900 4DL/1UL PCL=5 312 mA EGSM900 3DL/2UL PCL=5 448 mA EGSM900 2DL/3UL PCL=5 540 mA EGSM900 1DL/4UL PCL=5 610 mA DCS1800 1DL/1UL PCL=0 196 mA Sleep (USB disconnected) GSM/GPRS supply current Sleep (USB suspended) Sleep (USB disconnected) WCDMA supply current Sleep (USB suspended) IVBAT GPRS data transfer (GNSS off) UC20_Hardware_Design Confidential / Released 63 / 82 UMTS/HSPA Module Series UC20 Hardware Design EDGE data transfer (GNSS off) UC20_Hardware_Design DCS1800 4DL/1UL PCL=0 204 mA DCS1800 3DL/2UL PCL=0 299 mA DCS1800 2DL/3UL PCL=0 368 mA DCS1800 1DL/4UL PCL=0 432 mA PCS1900 1DL/1UL PCL=0 238 mA PCS1900 4DL/1UL PCL=0 247 mA PCS1900 3DL/2UL PCL=0 256 mA PCS1900 2DL/3UL PCL=0 467 mA PCS1900 1DL/4UL PCL=0 572 mA GSM850 1DL/1UL PCL=8 190 mA GSM850 4DL/1UL PCL=8 210 mA GSM850 3DL/2UL PCL=8 306 mA GSM850 2DL/3UL PCL=8 400 mA GSM850 1DL/4UL PCL=8 494 mA EGSM900 1DL/1UL PCL=8 185 mA EGSM900 4DL/1UL PCL=8 197 mA EGSM900 3DL/2UL PCL=8 293 mA EGSM900 2DL/3UL PCL=8 386 mA EGSM900 1DL/4UL PCL=8 480 mA DCS1800 1DL/1UL PCL=2 162 mA DCS1800 4DL/1UL PCL=2 165 mA DCS1800 3DL/2UL PCL=2 245 mA DCS1800 2DL/3UL PCL=2 322 mA DCS1800 1DL/4UL PCL=2 399 mA PCS1900 1DL/1UL PCL=2 189 mA PCS1900 4DL/1UL PCL=2 189 mA Confidential / Released 64 / 82 UMTS/HSPA Module Series UC20 Hardware Design PCS1900 3DL/2UL PCL=2 298 mA PCS1900 2DL/3UL PCL=2 401 mA PCS1900 1DL/4UL PCL=2 503 mA UMTS Band I HSDPA @max power 557 mA UMTS Band I HSUPA @max power 542 mA UMTS Band II HSDPA @max power 549 mA UMTS Band II HSUPA @max power 536 mA UMTS Band V HSDPA @max power 593 mA UMTS Band V HSUPA @max power 576 mA UMTS Band VI HSDPA @max power 530 mA UMTS Band VI HSUPA @max power 493 mA UMTS Band VIII HSDPA @max power 539 mA UMTS Band VIII HSUPA @max power 505 mA GSM850 @PCL=5 292 mA EGSM900 @PCL=5 293 mA DCS1800 @PCL=0 235 mA PCS1900 @PCL=0 288 mA UMTS Band I @max power 531 mA UMTS Band II @max power 532 mA UMTS Band V @max power 528 mA UMTS Band VI @max power 470 mA UMTS Band VIII @max power 490 mA GNSS off 34.0 mA Cold start (Autonomous) 83.8 mA 74.6 mA 51.7 mA WCDMA data transfer (GNSS off) GSM voice call WCDMA voice call Tracking (Autonomous) Idle, USB active @WCDMA DRX=6 Tracking (DPO on) UC20_Hardware_Design Confidential / Released 65 / 82 UMTS/HSPA Module Series UC20 Hardware Design NOTE GNSS tracking current is tested in the following conditions: For Cold Start, 10 minutes after First Fix. For Hot Start, 15 seconds after First Fix. 6.5. RF Output Power The following table shows the RF output power of UC20 module. Table 32: Conducted RF Output Power Frequency Max. Min. GSM850 33dBm2dB 5dBm5dB EGSM900 33dBm2dB 5dBm5dB DCS1800 30dBm2dB 0dBm5dB PCS1900 30dBm2dB 0dBm5dB GSM850 (8-PSK) 27dBm3dB 5dBm5dB EGSM900 (8-PSK) 27dBm3dB 5dBm5dB DCS1800 (8-PSK) 26dBm3dB 0dBm5dB PCS1900 (8-PSK) 26dBm3dB 0dBm5dB UMTS 2100 24dBm+1/-3dB <-50dBm UMTS 1900 24dBm+1/-3dB <-50dBm UMTS 900 24dBm+1/-3dB <-50dBm UMTS 850 24dBm+1/-3dB <-50dBm UMTS 800 24dBm+1/-3dB <-50dBm NOTE In GPRS 4 slots TX mode, the max output power is reduced by 2.5dB. This design conforms to the GSM specification as described in chapter 13.16 of 3GPP TS 51.010-1. UC20_Hardware_Design Confidential / Released 66 / 82 UMTS/HSPA Module Series UC20 Hardware Design 6.6. RF Receiving Sensitivity The following table shows the conducted RF receiving sensitivity of UC20 module. Table 33: Conducted RF Receiving Sensitivity Frequency Receive Sensitivity (Typ.) GSM850 -108.5dBm EGSM900 -108.5dBm DCS1800 -108dBm PCS1900 -108dBm UMTS 2100 -110dBm UMTS 1900 -110dBm UMTS 900 -110dBm UMTS 850 -110dBm UMTS 800 -110dBm 6.7. Electrostatic Discharge The module is not protected against electrostatics discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. The following table shows the module electrostatics discharge characteristics. Table 34: Electrostatics Discharge Characteristics Tested Points Contact Discharge Air Discharge VBAT, GND 5 10 kV All Antenna Interfaces 4 8 kV 0.5 1 kV Other Interfaces UC20_Hardware_Design Confidential / Released Unit 67 / 82 UMTS/HSPA Module Series UC20 Hardware Design 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm. 7.1. Mechanical Dimensions of the Module (29+/-0.15) (32+/-0.15) Figure 39: UC20 Top and Side Dimensions UC20_Hardware_Design Confidential / Released 68 / 82 UMTS/HSPA Module Series UC20 Hardware Design 3.2 3.4 3.2 3.4 3.2 3.4 4.8 29.0 32.0 Figure 40: UC20 Bottom Dimensions (Bottom View) UC20_Hardware_Design Confidential / Released 69 / 82 UMTS/HSPA Module Series UC20 Hardware Design Figure 41: Bottom Pads Dimensions (Bottom View) UC20_Hardware_Design Confidential / Released 70 / 82 UMTS/HSPA Module Series UC20 Hardware Design 7.2. Footprint of Recommendation 22.1 3.45 3.4 1.9 6.45 6.8 6.16 4.6 29.0 4.4 7.8 3 9.04 2 9.3 4.8 2.5 1.0 1.9 13 Keepout area 0.8 1.3 Figure 42: Recommended Footprint (Top View) NOTES 1. 2. Pads 73~84 at the bottom center of module cannot be designed. And keep out the areas shown in pink on the above figure in the host PCB. In order to maintain the module, keep about 3mm between the module and other components in the host PCB. UC20_Hardware_Design Confidential / Released 71 / 82 UMTS/HSPA Module Series UC20 Hardware Design 7.3. Top View of the Module Figure 43: Top View of the Module 7.4. Bottom View of the Module Figure 44: Bottom View of the Module UC20_Hardware_Design Confidential / Released 72 / 82 UMTS/HSPA Module Series UC20 Hardware Design 8 Storage and Manufacturing 8.1. Storage UC20 is stored in the vacuum-sealed bag. The restriction of storage condition is shown as below. Shelf life in sealed bag is 12 months at < 40C/90%RH. After this bag is opened, devices that will be subjected to reflow solder or other high temperature process must be: Mounted within 72 hours at factory conditions of 30C/60%RH. Stored at < 10% RH. Devices require bake before mounting, if: Humidity indicator card is > 10% when read 23C5C. Mounted for more than 72 hours at factory conditions of 30C/60% RH. If baking is required, devices may be baked for 48 hours at 125C5C. NOTE As plastic container cannot be subjected to high temperature, module needs to be taken out from container to high temperature (125C) bake. If shorter bake times are desired, please refer to IPC/JEDECJ-STD-033 for bake procedure. 8.2. Manufacturing and Welding The squeegee should push the paste on the surface of the stencil that makes the paste fill the stencil openings and penetrate to the PCB. The force on the squeegee should be adjusted so as to produce a clean stencil surface on a single pass. To ensure the module soldering quality, the thickness of stencil at the hole of the module pads should be 0.18mm. For details, please refer to document [6]. UC20_Hardware_Design Confidential / Released 73 / 82 UMTS/HSPA Module Series UC20 Hardware Design It is suggested that peak reflow temperature is 235 ~ 245C (for SnAg3.0Cu0.5 alloy). Absolute max reflow temperature is 260C. To avoid damage to the module when it was repeatedly heated, it is suggested that the module should be mounted after the first panel has been reflowed. The following picture is the actual diagram which we have operated. C Preheat Heating Cooling 250 Liquids Temperature 217 200 C 200 40s~60s 160 C 150 70s~120s 100 Between 1~3 C/s 50 0 50 100 150 200 250 300 s Time Figure 45: Liquids Temperature 8.3. Packaging UC20 is packaged in the tap and reel carriers. One reel is 11.53m length and contains 250pcs modules. The figure below shows the package details, measured in mm. UC20_Hardware_Design Confidential / Released 74 / 82 1 0 .5 . 0 0.350.05 29.30.15 30.30.15 1 44.000.3 20.200.15 44.000.1 2.000.1 4.000.1 30.30.15 1.750.1 UMTS/HSPA Module Series UC20 Hardware Design 4.20.15 3.10.15 32.50.15 33.50.15 32.50.15 33.50.15 48.5 Cover tape 13 100 Direction of feed 44.5+0.20 -0.00 Figure 46: Carrier Tape UC20_Hardware_Design Confidential / Released 75 / 82 UMTS/HSPA Module Series UC20 Hardware Design 9 Appendix A Reference Table 35: Related Documents SN Document Name Remark [1] Quectel_UC20_AT_Commands_Manual UC20 AT Commands Manual [2] Quectel_UC20_EVB_User_Guide UC20 EVB User Guide [3] Quectel_UC20_Reference_Design UC20 Reference Design [4] Quectel_UC20&M10_Reference_Design UC20 and M10 Compatible Reference Design [5] Quectel_UC20&M10_Compatible_Design UC20 and M10 Compatible Design [6] Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide [7] Quectel_UC20_GNSS_AT_Commands_Manual UC20 GNSS AT Commands Manual [8] Quectel_UC20_Power_Management_Applicaition_ Note UC20 Power Management Application Note Table 36: Terms and Abbreviations Abbreviation Description AMR Adaptive Multi-rate ARP Antenna Reference Point bps Bits Per Second CEP Circular Error Probable CHAP Challenge Handshake Authentication Protocol CS Coding Scheme CSD Circuit Switched Data UC20_Hardware_Design Confidential / Released 76 / 82 UMTS/HSPA Module Series UC20 Hardware Design CTS Clear To Send DCE Data Communications Equipment (typically module) DRX Discontinuous Reception DTE Data Terminal Equipment (typically computer, external controller) DTR Data Terminal Ready DTX Discontinuous Transmission EFR Enhanced Full Rate EGSM Extended GSM900 band (includes standard GSM900 band) ESD Electrostatic Discharge FR Full Rate GLONASS GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, the Russian Global Navigation Satellite System GMSK Gaussian Minimum Shift Keying GNSS Global Navigation Satellite System GPS Global Positioning System GSM Global System for Mobile Communications HR Half Rate HSPA High Speed Packet Access I/O Input/Output IMEI International Mobile Equipment Identity Imax Maximum Load Current Inorm Normal Current LED Light Emitting Diode LNA Low Noise Amplifier ME Mobile Equipment MO Mobile Originated UC20_Hardware_Design Confidential / Released 77 / 82 UMTS/HSPA Module Series UC20 Hardware Design MS Mobile Station (GSM engine) MT Mobile Terminated PAP Password Authentication Protocol PBCCH Packet Switched Broadcast Control Channel PCB Printed Circuit Board PDU Protocol Data Unit PPP Point-to-Point Protocol PSK Phase Shift Keying QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RHCP Right Hand Circularly Polarized RMS Root Mean Square (value) RTC Real Time Clock Rx Receive SIM Subscriber Identification Module SMS Short Message Service TE Terminal Equipment UART Universal Asynchronous Receiver & Transmitter UMTS Universal Mobile Telecommunications System URC Unsolicited Result Code USIM Universal Subscriber Identity Module USSD Unstructured Supplementary Service Data Vmax Maximum Voltage Value Vnorm Normal Voltage Value UC20_Hardware_Design Confidential / Released 78 / 82 UMTS/HSPA Module Series UC20 Hardware Design Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access UC20_Hardware_Design Confidential / Released 79 / 82 UMTS/HSPA Module Series UC20 Hardware Design 10 Appendix B GPRS Coding Scheme Table 37: Description of Different Coding Schemes USF Pre-coded USF Radio Block excl.USF and BCS BCS Tail Coded Bits Punctured Bits Data Rate Kb/s 1/2 3 3 181 40 4 456 0 9.05 CS-2 2/3 3 6 268 16 4 588 132 13.4 CS-3 3/4 3 6 312 16 4 676 220 15.6 CS-4 1 3 12 428 16 - 456 - 21.4 Sch eme Code Rate CS-1 UC20_Hardware_Design Confidential / Released 80 / 82 UMTS/HSPA Module Series UC20 Hardware Design 11 Appendix C GPRS Multi-slot Class Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification. Multi-slot classes are product dependant, and determine the maximum achievable data rates in both the uplink and downlink directions. Written as 3+1 or 2+2, the first number indicates the amount of downlink timeslots, while the second number indicates the amount of uplink timeslots. The active slots determine the total number of slots the GPRS device can use simultaneously for both uplink and downlink communications. The description of different multi-slot classes is shown in the following table. Table 38: GPRS Multi-slot Classes Multislot Class Downlink Slots Uplink Slots Active Slots 1 1 1 2 2 2 1 3 3 2 2 3 4 3 1 4 5 2 2 4 6 3 2 4 7 3 3 4 8 4 1 5 9 3 2 5 10 4 2 5 11 4 3 5 12 4 4 5 UC20_Hardware_Design Confidential / Released 81 / 82 UMTS/HSPA Module UC20 Hardware Design 12 Appendix D EDGE Modulation and Coding Scheme Table 39: EDGE Modulation and Coding Scheme Coding Scheme Modulation Coding Family 1 Timeslot 2 Timeslot 4 Timeslot CS-1: GMSK / 9.05kbps 18.1kbps 36.2kbps CS-2: GMSK / 13.4kbps 26.8kbps 53.6kbps CS-3: GMSK / 15.6kbps 31.2kbps 62.4kbps CS-4: GMSK / 21.4kbps 42.8kbps 85.6kbps MCS-1 GMSK C 8.80kbps 17.60kbps 35.20kbps MCS-2 GMSK B 11.2kbps 22.4kbps 44.8kbps MCS-3 GMSK A 14.8kbps 29.6kbps 59.2kbps MCS-4 GMSK C 17.6kbps 35.2kbps 70.4kbps MCS-5 8-PSK B 22.4kbps 44.8kbps 89.6kbps MCS-6 8-PSK A 29.6kbps 59.2kbps 118.4kbps MCS-7 8-PSK B 44.8kbps 89.6kbps 179.2kbps MCS-8 8-PSK A 54.4kbps 108.8kbps 217.6kbps MCS-9 8-PSK A 59.2kbps 118.4kbps 236.8kbps UC20_Hardware_Design Confidential / Released 82 / 82