Real time clock module Product Number (Please contact us) RX6110SA B : X1B000232000100 REAL TIME CLOCK MODULE (SPI & I2C-Bus) Power Switching and Low current consumption RX6110SA B *Built in frequency adjusted 32.768 kHz crystal unit. *Interface Type : SPI & I2C -Bus *Operating voltage range : 1.6Vto5.5V *The wide voltage for time keeping. : 1.1Vto5.5V *Low backup current : 130nA/3V(Typ.) *Built-in user RAM : 128bit(8bit16,SRAM) *Auto power switching functions : When VDD deteriorates than 1.6V, internal source is switched to VBAT. *The various functions include full calendar, alarm, timer. Epson prepared Linux driver for development. (http://www5.epsondevice.com/en/information/support/linux_rtc/) Actual size The registered trademark Linux(R) is used pursuant to a sublicense from LMI(Linux Mark Institute) The I2C-Bus is a trademark of NXP Semiconductors Block diagram Overview VDD VDD Detector *Interface type. *SPI-Bus and I2C-Bus interface. *By a terminal, a switchover of the interface is possible. VIO SPISEL VBAT Register Control (System Control) R C VBAT Control Bus Interface Alarm Register CLK/SCL Timer Register DI/SDA LVEL SHIFTER Interrupts Controller Battery backup connection example (2) VBAT OSC Divider Clock and Calender R DO *Alarm function *Alarm function can be set to day of week, day, hour, and minute. *It is recorded automatic to AF-bit at the alarm occurrence, and possible to output with /IRQ1 pin output. /IRQ2 User RAM C /IRQ1 FOUT Controller *User RAM *128 bit (8 bit x 16, SRAM) GND Pin Function Input/Output SPISEL Input CE/FOE Input CLK/SCL Input DI/SDA Input / Output RX6110SA Function The interface select pin. SPI is chosen at a "H" level (VIO voltage) / I2C is chosen at a "L" level (GND voltage). 1. CLK/SCL SPI: Should be held high to allow access to the CPU. Incorporates a pull-down resistor. I2C: It is an input pin for controlling the DO/FOUT output. When the frequency output from a DO/FOUT pin does not need, CE/FOE pin must be connected to GND. This is a shift clock input pin for serial data transmission. 2. DI/SDA 3. DO/FOUT 4. CE/FOE 5. SPISEL 6. GND 7. /IRQ2 VDD SPI: This is the data input pin for serial data transfer. I2C: This is the data input/output pin for serial data transfer. SPI: This is the data output pin for serial data transfer. I2C: This is the C-MOS output pin with output control provided via the CE/FOE pin. (frequency selection: 32.768 kHz / 1024 Hz / 1Hz / Hi-z) This pin outputs interrupt signals ("L" level) for alarm, timer, time update, and FOUT. This is an N-ch open-drain output. This pin can output even a backup mode. This pin outputs interrupt signals ("L" level) for timer and FOUT. This is an C-MOS output. This pin becomes Hi-z in less than VDD=1.6V. This is a power-supply pin. It can impress the voltage unlike VIO. VIO This pin is a power supply for input and the output and input / output pins. Connected to a positive power supply. VBAT Connect a secondary battery or capacitor for backup power supply. If a backup power supply is not present, this pin connect to VDD GND Connected to a ground. DO/FOUT Output / IRQ1 Output / IRQ2 Output Item Min. 1.6 1.1 Typ. 3.0 3.0 Max. 5.5 5.5 Unit V V TOPR - -40 +25 +85 C tSTA Conditions Ta=+25C VDD=3.0V Ta=+25C VDD=1.6V N.C. 12. /IRQ1 11. VIO 10. VDD 9. VBAT 8. N.C. SOP - 14 pin * Refer to application manual for details. Conditions - f/f 7.40.2 Current consumption characteristics Symbol VDD VCLK Symbol N.C. 13. The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs. Item Frequency characteristics Frequency tolerance Oscillation start-up time 14. 5.0 Specifications (characteristics) Recommended Operating Conditions Item Power voltage Clock voltage Operating temperature 10.1 0.2 Signal Name (Unit:mm) Terminal connection/External dimensions 3.20.1 EDLC or secondary battery 1.27 primary battery *Built-in auto power switching function *To efficiently charge from VDD to backup battery (Secondary battery, Large capacitor) connected to VBAT is possible. Detects VDD voltage drop(VDET-) and automatically switches to the backup battery. *Frequency output function Output frequency is selectable from 32.768kHz, 1024Hz,1Hz. *Timer function *Timer function is selectable in 1/4096 second from 65535 hours. *Timer source clock are 1hour, 1min, 64Hz, 4096Hz. *It is recorded automatic to TF-bit at the time of event occurrence, and possible to output with /IRQ1 or /IRQ2 pin. CE/FOE I/O Battery backup connection example (1) Rating Unit B: 5231 106 1Max. s 1)Equivalent to 1 minute of monthly deviation (excluding offset.) / Standard product Ta=-40Cto+85C Symbol Conditions Min. Typ. Max. Unit IBK VBAT = 3.0 V Input pins are "L" ,VDD = 0 V DO/FOUT=OFF, fCLK = 0 Hz, /IRQ1,2 = OFF, TSEL2="1" It include an OFF leak current of SW between the power supply (VBAT-VDD) - 130 250 nA I32k VDD = 3.0 V fCLK = 0 Hz, /IRQ1,2=OFF,CE/FOE=VIO, DO/FOUT:32.768kHz ON, CL=0pF - 1.5 2.1 A Current Consumption PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Seiko Epson, all environmental initiatives operate under the Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous improvements. The environmental management system (EMS) operates under the ISO 14001 environmental management standard. All of our major manufacturing and non-manufacturing sites, in Japan and overseas, completed the acquisition of ISO 14001 certification. ISO 14000 is an international standard for environmental management that was established by the International Standards Organization in 1996 against the background of growing concern regarding global warming, destruction of the ozone layer, and global deforestation. WORKING FOR HIGH QUALITY In order provide high quality and reliable products and services than meet customer needs, Seiko Epson made early efforts towards obtaining ISO9000 series certification and has acquired ISO9001 for all business establishments in Japan and abroad. We have also acquired ISO/TS 16949 certification that is requested strongly by major automotive manufacturers as standard. ISO/TS16949 is the international standard that added the sector-specific supplemental requirements for automotive industry based on ISO9001. Explanation of the mark that are using it for the catalog Pb free. Complies with EU RoHS directive. *About the products without the Pb-free mark. Contains Pb in products exempted by EU RoHS directive. (Contains Pb in sealing glass, high melting temperature type solder or other.) Designed for automotive applications such as Car Multimedia, Body Electronics, Remote Keyless Entry etc. Designed for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ). Notice * * * * * * This material is subject to change without notice. Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson. The information about applied data, circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of customer damage or infringing on any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual copyrights. 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When using them in specific applications that require extremely high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance. / Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains, vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment and security equipment / traffic control equipment / and others requiring equivalent reliability. * All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective. Seiko Epson Corporation