ADVANCED INFORMATION MX29LV401T/B 4M-BIT [512K x 8 / 256K x 16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY FEATURES * Extended single - supply voltage range 2.7V to 3.6V * 524,288 x 8/262,144 x 16 switchable * Single power supply operation - 3.0V only operation for read, erase and program operation * Fast access time: 55R/70/90ns * Low power consumption - 20mA maximum active current - 0.2uA typical standby current * Command register architecture - Byte/word Programming (9us/11us typical) - Sector Erase (Sector structure 16K-Byte x 1, 8K-Byte x 2, 32K-Byte x1, and 64K-Byte x7) * Auto Erase (chip & sector) and Auto Program - Automatically erase any combination of sectors with Erase Suspend capability. - Automatically program and verify data at specified address * Erase suspend/Erase Resume - Suspends sector erase operation to read data from, or program data to, any sector that is not being erased, then resumes the erase. * Status Reply - Data polling & Toggle bit for detection of program and erase operation completion. * Ready/Busy pin (RY/BY) - Provides a hardware method of detecting program or erase operation completion. * Sector protection - Hardware method to disable any combination of sectors from program or erase operations - Temporary sector unprotect allows code changes in previously locked sectors. * 100,000 minimum erase/program cycles * Latch-up protected to 100mA from -1V to VCC+1V * Boot Sector Architecture - T = Top Boot Sector - B = Bottom Boot Sector * Package type: - 44-pin SOP - 48-pin TSOP - 48-ball CSP * Compatibility with JEDEC standard - Pinout and software compatible with single-power supply Flash * 20 years data retention GENERAL DESCRIPTION The MX29LV401T/B is a 4-mega bit Flash memory organized as 512K bytes of 8 bits or 256K words of 16 bits. MXIC's Flash memories offer the most cost-effective and reliable read/write non-volatile random access memory. The MX29LV401T/B is packaged in 44-pin SOP, 48-pin TSOP and 48-ball CSP. It is designed to be reprogrammed and erased in system or in standard EPROM programmers. TTL level control inputs and fixed power supply levels during erase and programming, while maintaining maximum EPROM compatibility. MXIC Flash technology reliably stores memory contents even after 100,000 erase and program cycles. The MXIC cell is designed to optimize the erase and programming mechanisms. In addition, the combination of advanced tunnel oxide processing and low internal electric fields for erase and program operations produces reliable cycling. The MX29LV401T/B uses a 2.7V~3.6V VCC supply to perform the High Reliability Erase and auto Program/Erase algorithms. The standard MX29LV401T/B offers access time as fast as 55ns, allowing operation of high-speed microprocessors without wait states. To eliminate bus contention, the MX29LV401T/B has separate chip enable (CE) and output enable (OE) controls. The highest degree of latch-up protection is achieved with MXIC's proprietary non-epi process. Latch-up protection is proved for stresses up to 100 milliamps on address and data pin from -1V to VCC + 1V. MXIC's Flash memories augment EPROM functionality with in-circuit electrical erasure and programming. The MX29LV401T/B uses a command register to manage this functionality. The command register allows for 100% P/N:PM0853 REV. 0.2, JUL. 03, 2002 1 MX29LV401T/B PIN CONFIGURATIONS PIN DESCRIPTION SYMBOL PIN NAME 44 SOP(500 mil) 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 MX29LV401T/B NC RY/BY A17 A7 A6 A5 A4 A3 A2 A1 A0 CE GND OE Q0 Q8 Q1 Q9 Q2 Q10 Q3 Q11 RESET WE A8 A9 A10 A11 A12 A13 A14 A15 A16 BYTE GND Q15/A-1 Q7 Q14 Q6 Q13 Q5 Q12 Q4 VCC A0~A17 Address Input Q0~Q14 Data Input/Output Q15/A-1 Q15 (Word mode) / LSB addr (Byte mode) CE Chip Enable Input WE Write Enable Input BYTE Word/Byte Selection input RESET Hardware Reset Pin/Sector Protect Unlock OE Output Enable Input RY/BY Ready/Busy Output VCC Power Supply Pin (2.7V~3.6V) GND Ground Pin 48 TSOP (Standard Type) (12mm x 20mm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 A15 A14 A13 A12 A11 A10 A9 A8 NC NC WE RSEET NC NC RY/BY NC A17 A7 A6 A5 A4 A3 A2 A1 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 MX29LV401T/B A16 BYTE GND Q15/A-1 Q7 Q14 Q6 Q13 Q5 Q12 Q4 VCC Q11 Q3 Q10 Q2 Q9 Q1 Q8 Q0 OE GND CE A0 48-Ball CSP (6mm x 8mm, Ball Pitch = 0.8 mm), Top View, Balls Facing Down A B C D E F G H 6 A13 A12 A14 A15 A16 BYTE Q15/A-1 GND 5 A9 A8 A10 A11 Q7 Q14 Q13 Q6 4 WE RESET NC NC Q5 Q12 Vcc Q4 3 RY/BY NC NC NC Q2 Q10 Q11 Q3 2 A7 A17 A6 A5 Q0 Q8 Q9 Q1 1 A3 A4 A2 A1 A0 CE OE GND P/N:PM0853 REV. 0.2, JUL. 03, 2002 2 MX29LV401T/B BLOCK STRUCTURE Table 1: MX29LV401T SECTOR ARCHITECTURE Sector Sector Size Byte Mode Word Mode Address range Byte Mode (x8) Word Mode (x16) Sector Address A17 A16 A15 A14 A13 A12 SA0 64Kbytes 32Kwords 00000-0FFFF 00000-07FFF 0 0 0 X X X SA1 64Kbytes 32Kwords 10000-1FFFF 08000-0FFFF 0 0 1 X X X SA2 64Kbytes 32Kwords 20000-2FFFF 10000-17FFF 0 1 0 X X X SA3 64Kbytes 32Kwords 30000-3FFFF 18000-1FFFF 0 1 1 X X X SA4 64Kbytes 32Kwords 40000-4FFFF 20000-27FFF 1 0 0 X X X SA5 64Kbytes 32Kwords 50000-5FFFF 28000-2FFFF 1 0 1 X X X SA6 64Kbytes 32Kwords 60000-6FFFF 30000-37FFF 1 1 0 X X X SA7 32Kbytes 16Kwords 70000-77FFF 38000-3BFFF 1 1 1 0 X X SA8 8Kbytes 4Kwords 78000-79FFF 3C000-3CFFF 1 1 1 1 0 0 SA9 8Kbytes 4Kwords 7A000-7BFFF 3D000-3DFFF 1 1 1 1 0 1 SA10 16Kbytes 8Kwords 7C000-7FFFF 3E000-3FFFF 1 1 1 1 1 X Note: Byte mode:address range A17:A-1, word mode:address range A17:A0. Table 2: MX29LV401B SECTOR ARCHITECTURE Sector Sector Size Byte Mode Word Mode Address range Byte Mode (x8) Word Mode (x16) Sector Address A17 A16 A15 A14 A13 A12 SA0 16Kbytes 8Kwords 00000-03FFF 00000-01FFF 0 0 0 0 0 X SA1 8Kbytes 4Kwords 04000-05FFF 02000-02FFF 0 0 0 0 1 0 SA2 8Kbytes 4Kwords 06000-07FFF 03000-03FFF 0 0 0 0 1 1 SA3 32Kbytes 16Kwords 08000-0FFFF 04000-07FFF 0 0 0 1 X X SA4 64Kbytes 32Kwords 10000-1FFFF 08000-0FFFF 0 0 1 X X X SA5 64Kbytes 32Kwords 20000-2FFFF 10000-17FFF 0 1 0 X X X SA6 64Kbytes 32Kwords 30000-3FFFF 18000-1FFFF 0 1 1 X X X SA7 64Kbytes 32Kwords 40000-4FFFF 20000-27FFF 1 0 0 X X X SA8 64Kbytes 32Kwords 50000-5FFFF 28000-2FFFF 1 0 1 X X X SA9 64Kbytes 32Kwords 60000-6FFFF 30000-37FFF 1 1 0 X X X SA10 64Kbytes 32Kwords 70000-7FFFF 38000-3FFFF 1 1 1 X X X Note: Byte mode:address range A17:A-1, word mode:address range A17:A0. P/N:PM0853 REV. 0.2, JUL. 03, 2002 3 MX29LV401T/B BLOCK DIAGRAM CE OE WE RESET CONTROL INPUT HIGH VOLTAGE LOGIC LATCH BUFFER Y-DECODER AND X-DECODER ADDRESS A0-A17 PROGRAM/ERASE WRITE STATE MACHINE (WSM) STATE REGISTER MX29LV401T/B FLASH ARRAY Y-PASS GATE SENSE AMPLIFIER PGM DATA HV ARRAY SOURCE HV COMMAND DATA DECODER COMMAND DATA LATCH PROGRAM DATA LATCH Q0-Q15/A-1 I/O BUFFER P/N:PM0853 REV. 0.2, JUL. 03, 2002 4 MX29LV401T/B AUTOMATIC PROGRAMMING AUTOMATIC ERASE ALGORITHM The MX29LV401T/B is byte programmable using the Automatic Programming algorithm. The Automatic Programming algorithm makes the external system do not need to have time out sequence nor to verify the data programmed. The typical chip programming time at room temperature of the MX29LV401T/B is less than 10 seconds. MXIC's Automatic Erase algorithm requires the user to write commands to the command register using standard microprocessor write timings. The device will automatically pre-program and verify the entire array. Then the device automatically times the erase pulse width, provides the erase verification, and counts the number of sequences. A status bit toggling between consecutive read cycles provides feedback to the user as to the status of the erasing operation. AUTOMATIC CHIP ERASE Register contents serve as inputs to an internal statemachine which controls the erase and programming circuitry. During write cycles, the command register internally latches address and data needed for the programming and erase operations. During a system write cycle, addresses are latched on the falling edge, and data are latched on the rising edge of WE or CE, whichever happens first. The entire chip is bulk erased using 10 ms erase pulses according to MXIC's Automatic Chip Erase algorithm. Typical erasure at room temperature is accomplished in less than 25 second. The Automatic Erase algorithm automatically programs the entire array prior to electrical erase. The timing and verification of electrical erase are controlled internally within the device. MXIC's Flash technology combines years of EPROM experience to produce the highest levels of quality, reliability, and cost effectiveness. The MX29LV401T/B electrically erases all bits simultaneously using FowlerNordheim tunneling. The bytes are programmed by using the EPROM programming mechanism of hot electron injection. AUTOMATIC SECTOR ERASE The MX29LV401T/B is sector(s) erasable using MXIC's Auto Sector Erase algorithm. The Automatic Sector Erase algorithm automatically programs the specified sector(s) prior to electrical erase. The timing and verification of electrical erase are controlled internally within the device. An erase operation can erase one sector, multiple sectors, or the entire device. During a program cycle, the state-machine will control the program sequences and command register will not respond to any command set. During a Sector Erase cycle, the command register will only respond to Erase Suspend command. After Erase Suspend is completed, the device stays in read mode. After the state machine has completed its task, it will allow the command register to respond to its full command set. AUTOMATIC PROGRAMMING ALGORITHM MXIC's Automatic Programming algorithm requires the user to only write program set-up commands (including 2 unlock write cycle and A0H) and a program command (program data and address). The device automatically times the programming pulse width, provides the program verification, and counts the number of sequences. The device provides an unlock bypass mode with faster programming. Only two write cycles are needed to program a word or byte, instead of four. A status bit similar to DATA polling and a status bit toggling between consecutive read cycles, provide feedback to the user as to the status of the programming operation. Refer to write operation status, table 7, for more information on these status bits. AUTOMATIC SELECT The automatic select mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on Q7~Q0. This mode is mainly adapted for programming equipment on the device to be programmed with its programming algorithm. When programming by high voltage method, automatic select mode requires VID (11.5V to 12.5V) on address pin A9 and other address pin A6, A1 as referring to Table 3. In addition, to access the automatic select codes insystem, the host can issue the automatic select com- P/N:PM0853 REV. 0.2, JUL. 03, 2002 5 MX29LV401T/B mand through the command register without requiring VID, as shown in table 4. To verify whether or not sector being protected, the sector address must appear on the appropriate highest order address bit (see Table 1 and Table 2). The rest of address bits, as shown in table3, are don't care. Once all necessary bits have been set as required, the programming equipment may read the corresponding identifier code on Q7~Q0. TABLE 3. MX29LV401T/B AUTOSELECT MODE OPERATION A17 A11 A9 A8 A6 A5 A1 A0 Description Mode CE OE WE RESET | | A12 A10 Manufacture | | A7 A2 Q15~Q0 L L H H X X VID X L X L L C2H Code Read Device ID Word L L H H X X VID X L X L H 22B9H Silicon (Top Boot Block) Byte L L H H X X VID X L X L H XXB9H ID Device ID (Bottom Word L L H H X X VID X L X L H 22BAH Boot Block) Byte L L H H X X VID X L X L H XXBAH XX01H Sector Protection L L H H SA X VID X Verification L X H L (protected) XX00H (unprotected) NOTE:SA=Sector Address, X=Don't Care, L=Logic Low, H=Logic High P/N:PM0853 REV. 0.2, JUL. 03, 2002 6 MX29LV401T/B TABLE 4. MX29LV401T/B COMMAND DEFINITIONS Command Bus First Bus Cycle Cycle Addr Second Bus Cycle Data Addr Third Bus Cycle Fourth Bus Cycle Data Addr Data Addr Data Reset 1 XXXH F0H Read 1 RA Word 4 555H AAH 2AAH 55H 555H 90H ADI DDI Byte 4 AAAH AAH 555H 55H AAAH 90H ADI DDI Word 4 555H AAH 2AAH 55H 555H 90H (SA) XX00H Read Silicon ID Sector Protect x02H 4 AAAH AAH 555H 55H AAAH 90H (SA) x04H Program Addr Sixth Bus Cycle Data Addr Data RD Verify Byte Fifth Bus Cycle XX01H 00H 01H Word 4 555H AAH 2AAH 55H 555H A0H PA PD Byte 4 AAAH AAH 555H 55H AAAH A0H PA PD Word 6 555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H 555H 10H Byte 6 AAAH AAH 555H 55H AAAH 80H AAAH AAH 555H 55H AAAH 10H Word 6 555H AAH 2AAH 55H 555H 80H 555H AAH 2AAH 55H SA 30H Byte 6 AAAH AAH 555H 55H AAAH 80H AAAH AAH 555H 55H SA 30H Sector Erase Suspend 1 XXXH B0H Sector Erase Resume 1 XXXH 30H Chip Erase Sector Erase Note: 1. ADI = Address of Device identifier; A1=0, A0 = 0 for manufacturer code,A1=0, A0 = 1 for device code. A2-A17=do not care. (Refer to table 3) DDI = Data of Device identifier : C2H for manufacture code, B9H/BAH (x8) and 22B9H/22BAH (x16) for device code. X = X can be VIL or VIH RA=Address of memory location to be read. RD=Data to be read at location RA. 2.PA = Address of memory location to be programmed. PD = Data to be programmed at location PA. SA = Address of the sector to be erased. 3.The system should generate the following address patterns: 555H or 2AAH to Address A10~A0 in word mode/AAAH or 555H to Address A10~A-1 in byte mode. Address bit A11~A17=X=Don't care for all address commands except for Program Address (PA) and Sector Address (SA). Write Sequence may be initiated with A11~A17 in either state. 4. For Sector Protect Verify operation:If read out data is 01H, it means the sector has been protected. If read out data is 00H, it means the sector is still not being protected. P/N:PM0853 REV. 0.2, JUL. 03, 2002 7 MX29LV401T/B COMMAND DEFINITIONS sequences. Note that the Erase Suspend (B0H) and Erase Resume (30H) commands are valid only while the Sector Erase operation is in progress. Device operations are selected by writing specific address and data sequences into the command register. Writing incorrect address and data values or writing them in the improper sequence will reset the device to the read mode. Table 4 defines the valid register command TABLE 5. MX29LV401T/B BUS OPERATION ADDRESS DESCRIPTION Read CE L OE L Q8~Q15 WE RESET A17 A10 A9 A8 A6 A5 A1 A11 A2 H A7 H A0 AIN Q0~Q7 Dout BYTE BYTE =VIH =VIL Dout Q8~Q14=High Z Q15=A-1 Write L H L H AIN DIN(3) DIN Q8~Q14=High Z Q15=A-1 Reset X X X L X High Z High Z High Z Temporary sector unlock X X X VID AIN DIN DIN High Z L H H H X High Z High Z High Z Vcc X X Vcc X High Z High Z High Z DIN X X Output Disable Standby 0.3V Sector Protect 0.3V L H L VID Chip Unprotect L Sector Protection Verify L SA H L VID X L H H SA X X X L X H L X X X H X H L DIN X X X VID X L X H L CODE(5) X X NOTES: 1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 4. 2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V. 3. Refer to Table 4 for valid Data-In during a write operation. 4. X can be VIL or VIH. 5. Code=00H/XX00H means unprotected. Code=01H/XX01H means protected. 6. A17~A12=Sector address for sector protect. 7. The sector protect and chip unprotect functions may also be implemented via programming equipment. P/N:PM0853 REV. 0.2, JUL. 03, 2002 8 MX29LV401T/B REQUIREMENTS FOR READING ARRAY DATA Refer to the Autoselect Mode and Autoselect Command Sequence section for more information. To read array data from the outputs, the system must drive the CE and OE pins to VIL. CE is the power control and selects the device. OE is the output control and gates array data to the output pins. WE should remain at VIH. ICC2 in the DC Characteristics table represents the active current specification for the write mode. The "AC Characteristics" section contains timing specification table and timing diagrams for write operations. The internal state machine is set for reading array data upon device power-up, or after a hardware reset. This ensures that no spurious alteration of the memory content occurs during the power transition. No command is necessary in this mode to obtain array data. Standard microprocessor read cycles that assert valid address on the device address inputs produce valid data on the device data outputs. The device remains enabled for read access until the command register contents are altered. STANDBY MODE When using both pins of CE and RESET, the device enter CMOS Standby with both pins held at Vcc 0.3V. IF CE and RESET are held at VIH, but not within the range of VCC 0.3V, the device will still be in the standby mode, but the standby current will be larger. During Auto Algorithm operation, Vcc active current (Icc2) is required even CE = "H" until the operation is completed. The device can be read with standard access time (tCE) from either of these standby modes, before it is ready to read data. WRITE COMMANDS/COMMAND SEQUENCES To program data to the device or erase sectors of memory , the system must drive WE and CE to VIL, and OE to VIH. OUTPUT DISABLE With the OE input at a logic high level (VIH), output from the devices are disabled. This will cause the output pins to be in a high impedance state. The device features an Unlock Bypass mode to facilitate faster programming. Once the device enters the Unlock Bypass mode, only two write cycles are required to program a byte, instead of four. The "byte Program Command Sequence" section has details on programming data to the device using both standard and Unlock Bypass command sequences. RESET OPERATION The RESET pin provides a hardware method of resetting the device to reading array data. When the RESET pin is driven low for at least a period of tRP, the device immediately terminates any operation in progress, tristates all output pins, and ignores all read/write commands for the duration of the RESET pulse. The device also resets the internal state machine to reading array data. The operation that was interrupted should be reinitiated once the device is ready to accept another command sequence, to ensure data integrity An erase operation can erase one sector, multiple sectors , or the entire device. Table indicates the address space that each sector occupies. A "sector address" consists of the address bits required to uniquely select a sector. The "Writing specific address and data commands or sequences into the command register initiates device operations. Table 1 defines the valid register command sequences. Writing incorrect address and data values or writing them in the improper sequence resets the device to reading array data. Section has details on erasing a sector or the entire chip, or suspending/resuming the erase operation. Current is reduced for the duration of the RESET pulse. When RESET is held at VSS0.3V, the device draws CMOS standby current (ICC4). If RESET is held at VIL but not within VSS0.3V, the standby current will be greater. After the system writes the autoselect command sequence, the device enters the autoselect mode. The system can then read autoselect codes from the internal register (which is separate from the memory array) on Q7-Q0. Standard read cycle timings apply in this mode. The RESET pin may be tied to system reset circuitry. A system reset would that also reset the Flash memory, enabling the system to read the boot-up firm-ware from P/N:PM0853 REV. 0.2, JUL. 03, 2002 9 MX29LV401T/B the Flash memory. SET-UP AUTOMATIC CHIP/SECTOR ERASE COMMANDS If RESET is asserted during a program or erase operation, the RY/BY pin remains a "0" (busy) until the internal reset operation is complete, which requires a time of tREADY (during Embedded Algorithms). The system can thus monitor RY/BY to determine whether the reset operation is complete. If RESET is asserted when a program or erase operation is completed within a time of tREADY (not during Embedded Algorithms). The system can read data tRH after the RESET pin returns to VIH. Chip erase is a six-bus cycle operation. There are two "unlock" write cycles. These are followed by writing the "set-up" command 80H. Two more "unlock" write cycles are then followed by the chip erase command 10H or sector erase command 30H. The Automatic Chip Erase does not require the device to be entirely pre-programmed prior to executing the Automatic Chip Erase. Upon executing the Automatic Chip Erase, the device will automatically program and verify the entire memory for an all-zero data pattern. When the device is automatically verified to contain an all-zero pattern, a self-timed chip erase and verify begin. The erase and verify operations are completed when the data on Q7 is "1" at which time the device returns to the Read mode. The system is not required to provide any control or timing during these operations. Refer to the AC Characteristics tables for RESET parameters and to Figure 22 for the timing diagram. READ/RESET COMMAND The read or reset operation is initiated by writing the read/reset command sequence into the command register. Microprocessor read cycles retrieve array data. The device remains enabled for reads until the command register contents are altered. When using the Automatic Chip Erase algorithm, note that the erase automatically terminates when adequate erase margin has been achieved for the memory array(no erase verification command is required). If program-fail or erase-fail happen, the write of F0H will reset the device to abort the operation. A valid command must then be written to place the device in the desired state. If the Erase operation was unsuccessful, the data on Q5 is "1"(see Table 7), indicating the erase operation exceed internal timing limit. The automatic erase begins on the rising edge of the last WE or CE pulse, whichever happens first in the command sequence and terminates when the data on Q7 is "1" and the data on Q6 stops toggling for two consecutive read cycles, at which time the device returns to the Read mode. SILICON-ID READ COMMAND Flash memories are intended for use in applications where the local CPU alters memory contents. As such, manufacturer and device codes must be accessible while the device resides in the target system. PROM programmers typically access signature codes by raising A9 to a high voltage (VID). However, multiplexing high voltage onto address lines is not generally desired system design practice. The MX29LV401T/B contains a Silicon-ID-Read operation to supple traditional PROM programming methodology. The operation is initiated by writing the read silicon ID command sequence into the command register. Following the command write, a read cycle with A1=VIL, A0=VIL retrieves the manufacturer code of C2H/00C2H. A read cycle with A1=VIL, A0=VIH returns the device code of B9H/22B9H for MX29LV401T, BAH/22BAH for MX29LV401B. P/N:PM0853 REV. 0.2, JUL. 03, 2002 10 MX29LV401T/B TABLE 6. EXPANDED SILICON ID CODE Pins Manufacture code Device code for MX29LV401T Device code for MX29LV401B Sector Protection Verification A0 Word VIL Byte VIL Word VIH Byte VIH Word VIH Byte VIH X X A1 VIL VIL VIL VIL VIL VIL VIH VIH Q15~Q8 00H X 22H X 22H X X X Q7 Q6 Q5 1 1 0 1 1 0 1 0 1 1 0 1 1 0 1 1 0 1 0 0 0 0 0 0 Q4 Q3 Q2 0 0 0 0 0 0 1 1 0 1 1 0 1 1 0 1 1 0 0 0 0 0 0 0 Q1 Q0 Code(Hex) 1 0 00C2H 1 0 C2H 0 1 22B9H 0 1 B9H 1 0 22BAH 1 0 BAH 0 1 01H (Protected) 0 0 00H (Unprotected) READING ARRAY DATA RESET COMMAND The device is automatically set to reading array data after device power-up. No commands are required to retrieve data. The device is also ready to read array data after completing an Automatic Program or Automatic Erase algorithm. Writing the reset command to the device resets the device to reading array data. Address bits are don't care for this command. The reset command may be written between the sequence cycles in an erase command sequence before erasing begins. This resets the device to reading array data. Once erasure begins, however, the device ignores reset commands until the operation is complete. After the device accepts an Erase Suspend command, the device enters the Erase Suspend mode. The system can read array data using the standard read timings, except that if it reads at an address within erasesuspended sectors, the device outputs status data. After completing a programming operation in the Erase Suspend mode, the system may once again read array data with the same exception. See Erase Suspend/Erase Resume Commands" for more infor-mation on this mode. The system must issue the reset command to re-enable the device for reading array data if Q5 goes high, or while in the autoselect mode. See the "Reset Command" section, next. The reset command may be written between the sequence cycles in a program command sequence be-fore programming begins. This resets the device to reading array data (also applies to programming in Erase Suspend mode). Once programming begins, however, the device ignores reset commands until the operation is complete. The reset command may be written between the sequence cycles in an SILICON ID READ command sequence. Once in the SILICON ID READ mode, the reset command must be written to return to reading array data (also applies to SILICON ID READ during Erase Suspend). If Q5 goes high during a program or erase operation, writing the reset command returns the device to reading array data (also applies during Erase Suspend). P/N:PM0853 REV. 0.2, JUL. 03, 2002 11 MX29LV401T/B SECTOR ERASE COMMANDS The Automatic Sector Erase does not require the device to be entirely pre-programmed prior to executing the Automatic Sector Erase Set-up command and Automatic Sector Erase command. Upon executing the Automatic Sector Erase command, the device will automatically program and verify the sector(s) memory for an all-zero data pattern. The system is not required to provide any control or timing during these operations. (no erase verification command is required). Sector erase is a six-bus cycle operation. There are two "unlock" write cycles. These are followed by writing the setup command 80H. Two more "unlock" write cycles are then followed by the sector erase command 30H. The sector address is latched on the falling edge of WE or CE, whichever happens later, while the command (data) is latched on the rising edge of WE or CE, whichever happens first. Sector addresses selected are loaded into internal register on the sixth falling edge of WE or CE, whichever happens later. Each successive sector load cycle started by the falling edge of WE or CE, whichever happens later must begin within 50us from the rising edge of the preceding WE or CE, whichever happens first. Otherwise, the loading period ends and internal auto sector erase cycle starts. (Monitor Q3 to determine if the sector erase timer window is still open, see section Q3, Sector Erase Timer.) Any command other than Sector Erase(30H) or Erase Suspend(B0H) during the time-out period resets the device to read mode. When the sector(s) is automatically verified to contain an all-zero pattern, a self-timed sector erase and verify begin. The erase and verify operations are complete when the data on Q7 is "1" and the data on Q6 stops toggling for two consecutive read cycles, at which time the device returns to the Read mode. The system is not required to provide any control or timing during these operations. When using the Automatic sector Erase algorithm, note that the erase automatically terminates when adequate erase margin has been achieved for the memory array Table 7. Write Operation Status Status Byte Program in Auto Program Algorithm Auto Erase Algorithm Erase Suspend Read (Erase Suspended Sector) Q7 (Note1) Q6 Q5 Q3 (Note2) Q2 RY/BY Q7 Toggle 0 N/A No Toggle 0 0 Toggle 0 1 Toggle 0 1 No Toggle 0 N/A Toggle 1 Data Data Q7 Toggle 0 N/A N/A 0 Q7 Toggle 1 N/A No Toggle 0 0 Toggle 1 1 Toggle 0 Q7 Toggle 1 N/A N/A 0 In Progress Erase Suspended Mode Erase Suspend Read (Non-Erase Suspended Sector) Erase Suspend Program Byte Program in Auto Program Algorithm Exceeded Time Limits Auto Erase Algorithm Erase Suspend Program Data Data Data 1 Note: 1. Q7 and Q2 require a valid address when reading status information. Refer to the appropriate subsection for further details. 2. Q5 switches to '1' when an Auto Program or Auto Erase operation has exceeded the maximum timing limits. See "Q5:Exceeded Timing Limits " for more information. P/N:PM0853 REV. 0.2, JUL. 03, 2002 12 MX29LV401T/B The device provides Q2, Q3, Q5, Q6, Q7, and RY/BY to determine the status of a write operation. If the program operation was unsuccessful, the data on Q5 is "1"(see Table 7), indicating the program operation exceed internal timing limit. The automatic programming operation is completed when the data read on Q6 stops toggling for two consecutive read cycles and the data on Q7 and Q6 are equivalent to data written to these two bits, at which time the device returns to the Read mode(no program verify command is required). ERASE SUSPEND This command only has meaning while the state machine is executing Automatic Sector Erase operation, and therefore will only be responded during Automatic Sector Erase operation. When the Erase Suspend command is written during a sector erase operation, the device requires a maximum of 20us to suspend the erase operations. However, When the Erase Suspend command is written during the sector erase time-out, the device immediately terminates the time-out period and suspends the erase operation. After this command has been executed, the command register will initiate erase suspend mode. The state machine will return to read mode automatically after suspend is ready. At this time, state machine only allows the command register to respond to the Read Memory Array, Erase Resume and program commands. WORD/BYTE PROGRAM COMMAND SEQUENCE The device programs one byte of data for each program operation. The command sequence requires four bus cycles, and is initiated by writing two unlock write cycles, followed by the program set-up command. The program address and data are written next, which in turn initiate the Embedded Program algorithm. The system is not required to provide further controls or timings. The device automatically generates the program pulses and verifies the programmed cell margin. Table 1 shows the address and data requirements for the byte program command sequence. The system can determine the status of the program operation using the Q7 or Q6 status bits, just as in the standard program operation. After an erase-suspend program operation is complete, the system can once again read array data within non-suspended sectors. When the Embedded Program algorithm is complete, the device then returns to reading array data and addresses are no longer latched. The system can determine the status of the program operation by using Q7, Q6, or RY/BY. See "Write Operation Status" for information on these status bits. ERASE RESUME This command will cause the command register to clear the suspend state and return back to Sector Erase mode but only if an Erase Suspend command was previously issued. Erase Resume will not have any effect in all other conditions. Another Erase Suspend command can be written after the chip has resumed erasing. Any commands written to the device during the Embedded Program Algorithm are ignored. Note that a hardware reset immediately terminates the programming operation. The Byte Program command sequence should be reinitiated once the device has reset to reading array data, to ensure data integrity. AUTOMATIC PROGRAM COMMANDS To initiate Automatic Program mode, A three-cycle command sequence is required. There are two "unlock" write cycles. These are followed by writing the Automatic Program command A0H. Programming is allowed in any sequence and across sector boundaries. A bit cannot be programmed from a "0" back to a "1". Attempting to do so may halt the operation and set Q5 to "1" ," or cause the Data Polling algorithm to indicate the operation was successful. However, a succeeding read will show that the data is still "0". Only erase operations can convert a "0" to a "1". Once the Automatic Program command is initiated, the next WE pulse causes a transition to an active programming operation. Addresses are latched on the falling edge, and data are internally latched on the rising edge of the WE or CE, whichever happens first. The rising edge of WE or CE, whichever happens first, also begins the programming operation. The system is not required to provide further controls or timings. The device will automatically provide an adequate internally generated program pulse and verify margin. WRITE OPERATION STATUS The device provides several bits to determine the status of a write operation: Q2, Q3, Q5, Q6, Q7, and RY/ BY. Table 10 and the following subsections describe the P/N:PM0853 REV. 0.2, JUL. 03, 2002 13 MX29LV401T/B functions of these bits. Q7, RY/BY, and DQ6 each offer a method for determining whether a program or erase operation is complete or in progress. These three bits are discussed first. RY/BY:Ready/Busy The RY/BY is a dedicated, open-drain output pin that indicates whether an Automatic Erase/Program algorithm is in progress or complete. The RY/BY status is valid after the rising edge of the final WE or CE, whichever happens first, in the command sequence. Since RY/BY is an open-drain output, several RY/BY pins can be tied together in parallel with a pull-up resistor to Vcc. Q7: Data Polling The Data Polling bit, Q7, indicates to the host sys-tem whether an Automatic Algorithm is in progress or completed, or whether the device is in Erase Suspend. Data Polling is valid after the rising edge of the final WE pulse in the program or erase command sequence. If the output is low (Busy), the device is actively erasing or programming. (This includes programming in the Erase Suspend mode.) If the output is high (Ready), the device is ready to read array data (including during the Erase Suspend mode), or is in the standby mode. During the Automatic Program algorithm, the device outputs on Q7 the complement of the datum programmed to Q7. This Q7 status also applies to programming during Erase Suspend. When the Automatic Program algorithm is complete, the device outputs the datum programmed to Q7. The system must provide the program address to read valid status information on Q7. If a program address falls within a protected sector, Data Polling on Q7 is active for approximately 1 us, then the device returns to reading array data. Table 7 shows the outputs for RY/BY during write operation. Q6:Toggle BIT I Toggle Bit I on Q6 indicates whether an Automatic Program or Erase algorithm is in progress or complete, or whether the device has entered the Erase Suspend mode. Toggle Bit I may be read at any address, and is valid after the rising edge of the final WE or CE, whichever happens first, in the command sequence(prior to the program or erase operation), and during the sector timeout. During the Automatic Erase algorithm, Data Polling produces a "0" on Q7. When the Automatic Erase algorithm is complete, or if the device enters the Erase Suspend mode, Data Polling produces a "1" on Q7. This is analogous to the complement/true datum out-put described for the Automatic Program algorithm: the erase function changes all the bits in a sector to "1" prior to this, the device outputs the "complement," or "0"." The system must provide an address within any of the sectors selected for erasure to read valid status information on Q7. During an Automatic Program or Erase algorithm operation, successive read cycles to any address cause Q6 to toggle. The system may use either OE or CE to control the read cycles. When the operation is complete, Q6 stops toggling. After an erase command sequence is written, if all sectors selected for erasing are protected, Q6 toggles and returns to reading array data. If not all selected sectors are protected, the Automatic Erase algorithm erases the unprotected sectors, and ignores the selected sectors that are protected. After an erase command sequence is written, if all sectors selected for erasing are protected, Data Polling on Q7 is active for approximately 100 us, then the device returns to reading array data. If not all selected sectors are protected, the Automatic Erase algorithm erases the unprotected sectors, and ignores the selected sectors that are protected. The system can use Q6 and Q2 together to determine whether a sector is actively erasing or is erase suspended. When the device is actively erasing (that is, the Automatic Erase algorithm is in progress), Q6 toggling. When the device enters the Erase Suspend mode, Q6 stops toggling. However, the system must also use Q2 to determine which sectors are erasing or erase-suspended. Alternatively, the system can use Q7. When the system detects Q7 has changed from the complement to true data, it can read valid data at Q7-Q0 on the following read cycles. This is because Q7 may change asynchronously with Q0-Q6 while Output Enable (OE) is asserted low. P/N:PM0853 REV. 0.2, JUL. 03, 2002 14 MX29LV401T/B If a program address falls within a protected sector, Q6 toggles for approximately 2 us after the program command sequence is written, then returns to reading array data. high. If the toggle bit is no longer toggling, the device has successfully completed the program or erase operation. If it is still toggling, the device did not complete the operation successfully, and the system must write the reset command to return to reading array data. Q6 also toggles during the erase-suspend-program mode, and stops toggling once the Automatic Program algorithm is complete. The remaining scenario is that system initially determines that the toggle bit is toggling and Q5 has not gone high. The system may continue to monitor the toggle bit and Q5 through successive read cycles, determining the status as described in the previous paragraph. Alternatively, it may choose to perform other system tasks. In this case, the system must start at the beginning of the algorithm when it returns to determine the status of the operation. Table 7 shows the outputs for Toggle Bit I on Q6. Q2:Toggle Bit II The "Toggle Bit II" on Q2, when used with Q6, indicates whether a particular sector is actively erasing (that is, the Automatic Erase algorithm is in process), or whether that sector is erase-suspended. Toggle Bit II is valid after the rising edge of the final WE or CE, whichever happens first, in the command sequence. Q5 Exceeded Timing Limits Q5 will indicate if the program or erase time has exceeded the specified limits (internal pulse count). Under these conditions Q5 will produce a "1". This time-out condition indicates that the program or erase cycle was not successfully completed. Data Polling and Toggle Bit are the only operating functions of the device under this condition. Q2 toggles when the system reads at addresses within those sectors that have been selected for erasure. (The system may use either OE or CE to control the read cycles.) But Q2 cannot distinguish whether the sector is actively erasing or is erase-suspended. Q6, by comparison, indicates whether the device is actively erasing, or is in Erase Suspend, but cannot distinguish which sectors are selected for erasure. Thus, both status bits are required for sectors and mode information. Refer to Table 7 to compare outputs for Q2 and Q6. If this time-out condition occurs during sector erase operation, it specifies that a particular sector is bad and it may not be reused. However, other sectors are still functional and may be used for the program or erase operation. The device must be reset to use other sectors. Write the Reset command sequence to the device, and then execute program or erase command sequence. This allows the system to continue to use the other active sectors in the device. Reading Toggle Bits Q6/ Q2 Whenever the system initially begins reading toggle bit status, it must read Q7-Q0 at least twice in a row to determine whether a toggle bit is toggling. Typically, the system would note and store the value of the toggle bit after the first read. After the second read, the system would compare the new value of the toggle bit with the first. If the toggle bit is not toggling, the device has completed the program or erase operation. The system can read array data on Q7-Q0 on the following read cycle. If this time-out condition occurs during the chip erase operation, it specifies that the entire chip is bad or combination of sectors are bad. If this time-out condition occurs during the byte programming operation, it specifies that the entire sector containing that byte is bad and this sector maynot be reused, (other sectors are still functional and can be reused). However, if after the initial two read cycles, the system determines that the toggle bit is still toggling, the system also should note whether the value of Q5 is high (see the section on Q5). If it is, the system should then determine again whether the toggle bit is toggling, since the toggle bit may have stopped toggling just as Q5 went The time-out condition will not appear if a user tries to program a non blank location without erasing. Please note that this is not a device failure condition since the device was incorrectly used. P/N:PM0853 REV. 0.2, JUL. 03, 2002 15 MX29LV401T/B Q3 Sector Erase Timer POWER SUPPLY DECOUPLING In order to reduce power switching effect, each device should have a 0.1uF ceramic capacitor connected between its VCC and GND. After the completion of the initial sector erase command sequence, the sector erase time-out will begin. Q3 will remain low until the time-out is complete. Data Polling and Toggle Bit are valid after the initial sector erase command sequence. POWER-UP SEQUENCE The MX29LV401T/B powers up in the Read only mode. In addition, the memory contents may only be altered after successful completion of the predefined command sequences. If Data Polling or the Toggle Bit indicates the device has been written with a valid erase command, Q3 may be used to determine if the sector erase timer window is still open. If Q3 is high ("1") the internally controlled erase cycle has begun; attempts to write subsequent commands to the device will be ignored until the erase operation is completed as indicated by Data Polling or Toggle Bit. If Q3 is low ("0"), the device will accept additional sector erase commands. To insure the command has been accepted, the system software should check the status of Q3 prior to and following each subsequent sector erase command. If Q3 were high on the second status check, the command may not have been accepted. TEMPORARY SECTOR UNPROTECT This feature allows temporary unprotection of previously protected sector to change data in-system. The Temporary Sector Unprotect mode is activated by setting the RESET pin to VID(11.5V-12.5V). During this mode, formerly protected sectors can be programmed or erased as un-protected sector. Once VID is remove from the RESET pin, all the previously protected sectors are protected again. DATA PROTECTION The MX29LV401T/B is designed to offer protection against accidental erasure or programming caused by spurious system level signals that may exist during power transition. During power up the device automatically resets the state machine in the Read mode. In addition, with its control register architecture, alteration of the memory contents only occurs after successful completion of specific command sequences. The device also incorporates several features to prevent inadvertent write cycles resulting from VCC power-up and power-down transition or system noise. SECTOR PROTECTION The MX29LV401T/B features hardware sector protection. This feature will disable both program and erase operations for these sectors protected. To activate this mode, the programming equipment must force VID on address pin A9 and OE (suggest VID = 12V). Programming of the protection circuitry begins on the falling edge of the WE pulse and is terminated on the rising edge. Please refer to sector protect algorithm and waveform. To verify programming of the protection circuitry, the programming equipment must force VID on address pin A9 ( with CE and OE at VIL and WE at VIH). When A1=VIH, A0=VIL, A6=VIL, it will produce a logical "1" code at device output Q0 for a protected sector. Otherwise the device will produce 00H for the unprotected sector. In this mode, the addresses, except for A1, are don't care. Address locations with A1 = VIL are reserved to read manufacturer and device codes.(Read Silicon ID) WRITE PULSE "GLITCH" PROTECTION Noise pulses of less than 5ns(typical) on CE or WE will not initiate a write cycle. LOGICAL INHIBIT Writing is inhibited by holding any one of OE = VIL, CE = VIH or WE = VIH. To initiate a write cycle CE and WE must be a logical zero while OE is a logical one. It is also possible to determine if the sector is protected in the system by writing a Read Silicon ID command. Performing a read operation with A1=VIH, it will produce a logical "1" at Q0 for the protected sector. P/N:PM0853 REV. 0.2, JUL. 03, 2002 16 MX29LV401T/B CHIP UNPROTECT The MX29LV401T/B also features the chip unprotect mode, so that all sectors are unprotected after chip unprotect is completed to incorporate any changes in the code. It is recommended to protect all sectors before activating chip unprotect mode. To activate this mode, the programming equipment must force VID on control pin OE and address pin A9. The CE pins must be set at VIL. Pins A6 must be set to VIH.(see Table 2) Refer to chip unprotect algorithm and waveform for the chip unprotect algorithm. The unprotection mechanism begins on the falling edge of the WE pulse and is terminated on the rising edge. It is also possible to determine if the chip is unprotected in the system by writing the Read Silicon ID command. Performing a read operation with A1=VIH, it will produce 00H at data outputs(Q0-Q7) for an unprotected sector. It is noted that all sectors are unprotected after the chip unprotect algorithm is completed. P/N:PM0853 REV. 0.2, JUL. 03, 2002 17 MX29LV401T/B ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS Storage Temperature Plastic Packages . . . . . . . . . . . . . ..... -65oC to +150oC Ambient Temperature with Power Applied. . . . . . . . . . . . . .... -65oC to +125oC Voltage with Respect to Ground VCC (Note 1) . . . . . . . . . . . . . . . . . -0.5 V to +4.0 V A9, OE, and RESET (Note 2) . . . . . . . . . . . ....-0.5 V to +12.5 V All other pins (Note 1) . . . . . . . -0.5 V to VCC +0.5 V Output Short Circuit Current (Note 3) . . . . . . 200 mA Commercial (C) Devices Ambient Temperature (TA ). . . . . . . . . . . . 0C to +70C Industrial (I) Devices Ambient Temperature (TA ). . . . . . . . . . -40C to +85C VCC Supply Voltages VCC for regulated voltage range . . . . . +3.0 V to 3.6 V VCC for full voltage range. . . . . . . . . . . +2.7 V to 3.6 V Operating ranges define those limits between which the functionality of the device is guaranteed. Notes: 1. Minimum DC voltage on input or I/O pins is -0.5 V. During voltage transitions, input or I/O pins may overshoot VSS to -2.0 V for periods of up to 20 ns. See Figure 6. Maximum DC voltage on input or I/O pins is VCC +0.5 V. During voltage transitions, input or I/O pins may overshoot to VCC +2.0 V for periods up to 20 ns. 2. Minimum DC input voltage on pins A9, OE, and RESET is -0.5 V. During voltage transitions, A9, OE, and RESET may overshoot VSS to -2.0 V for periods of up to 20 ns. See Figure 6. Maximum DC input voltage on pin A9 is +12.5 V which may overshoot to 14.0 V for periods up to 20 ns. 3. No more than one output may be shorted to ground at a time. Duration of the short circuit should not be greater than one second. Stresses above those listed under "Absolute Maximum Rat-ings" may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this data sheet is not implied. Exposure of the device to absolute maximum rating conditions for extended periods may affect device reliability. P/N:PM0853 REV. 0.2, JUL. 03, 2002 18 MX29LV401T/B Table 8. CAPACITANCE TA = 25oC, f = 1.0 MHz SYMBOL PARAMETER CIN1 MIN. MAX. UNIT CONDITIONS Input Capacitance 8 pF VIN = 0V CIN2 Control Pin Capacitance 12 pF VIN = 0V COUT Output Capacitance 12 pF VOUT = 0V Table 9. DC CHARACTERISTICS Symbol PARAMETER ILI TYP TA = -40oC TO 85oC, VCC = 2.7V to 3.6V MIN. TYP MAX. UNIT CONDITIONS Input Leakage Current 1 uA VIN = VSS to VCC ILIT A9 Input Leakage Current 35 uA VCC=VCC max; A9=12.5V ILO Output Leakage Current 1 uA VOUT = VSS to VCC, VCC=VCC max ICC1 VCC Active Read Current 7 12 mA CE=VIL, OE=VIH @5MHz 2 4 mA (Byte Mode) @1MHz 7 12 mA CE=VIL, OE=VIH @5MHz 2 4 mA (Word Mode) @1MHz ICC2 VCC Active write Current 15 30 mA CE=VIL, OE=VIH ICC3 VCC Standby Current 0.2 5 uA CE; RESET=VCC 0.3V ICC4 VCC Standby Current 0.2 5 uA RESET=VSS 0.3V 0.2 5 uA VIH=VCC 0.3V;VIL=VSS 0.3V -0.5 0.8 V 0.7xVCC VCC+ 0.3 V 11.5 12.5 V VCC=3.3V 0.45 V IOL = 4.0mA, VCC= VCC min During Reset ICC5 Automatic sleep mode VIL Input Low Voltage(Note 1) VIH Input High Voltage VID Voltage for Automatic Select and Temporary Chip Unprotect VOL Output Low Voltage VOH1 Output High Voltage(TTL) VOH2 Output High Voltage 0.85xVCC IOH = -2mA, VCC=VCC min VCC-0.4 IOH = -100uA, VCC min (CMOS) NOTES: 1. VIL min. = -1.0V for pulse width is equal to or less than 50 ns. VIL min. = -2.0V for pulse width is equal to or less than 20 ns. 2. VIH max. = VCC + 1.5V for pulse width is equal to or less than 20 ns If VIH is over the specified maximum value, read operation cannot be guaranteed. 3. Automatic sleep mode enable the low power mode when addresses remain stable for tACC +30ns. P/N:PM0853 REV. 0.2, JUL. 03, 2002 19 MX29LV401T/B AC CHARACTERISTICS TA = -40oC to 85oC, VCC = 2.7V~3.6V Table 10. READ OPERATIONS SYMBOL PARAMETER 29LV401T/B-70 29LV401T/B-90 MIN. MIN. MAX. MAX. UNIT CONDITIONS tRC Read Cycle Time (Note 1) 70 90 ns tACC Address to Output Delay 70 90 ns CE=OE=VIL tCE CE to Output Delay 70 90 ns OE=VIL tOE OE to Output Delay 30 35 ns CE=VIL tDF OE High to Output Float (Note1) 0 30 ns CE=VIL tOEH Output Enable Read 0 0 ns Hold Time 10 10 ns 0 0 ns Toggle and 25 0 Data Polling tOH Address to Output hold TEST CONDITIONS: CE=OE=VIL NOTE: 1. Not 100% tested. 2. tDF is defined as the time at which the output achieves the open circuit condition and data is no longer driven. * Input pulse levels: 0V/3.0V. * Input rise and fall times is equal to or less than 5ns. * Output load: 1 TTL gate + 100pF (Including scope and jig), for MX29LV401T/B-90. 1 TTL gate + 30pF (Including scope and jig) for MX29LV401T/B-70. * Reference levels for measuring timing: 1.5V. P/N:PM0853 REV. 0.2, JUL. 03, 2002 20 MX29LV401T/B Figure 1. SWITCHING TEST CIRCUITS 2.7K ohm DEVICE UNDER TEST +3.3V CL 6.2K ohm DIODES=IN3064 OR EQUIVALENT CL=100pF Including jig capacitance CL=30pF for MX29LV401T/B-70 Figure 2. SWITCHING TEST WAVEFORMS 3.0V 1.5V 1.5V TEST POINTS 0V INPUT OUTPUT AC TESTING: Inputs are driven at 3.0V for a logic "1" and 0V for a logic "0". Input pulse rise and fall times are < 5ns. P/N:PM0853 REV. 0.2, JUL. 03, 2002 21 MX29LV401T/B Figure 3. READ TIMING WAVEFORMS tRC VIH Addresses ADD Valid VIL tACC tCE CE VIH VIL WE VIH VIL tOE tOEH tDF VIH OE VIL tACC Outputs VOH HIGH Z tOH DATA Valid HIGH Z VOL VIH RESET VIL P/N:PM0853 REV. 0.2, JUL. 03, 2002 22 MX29LV401T/B AC CHARACTERISTICS TA = -40oC to 85oC, VCC = 2.7V~3.6V Table 11. Erase/Program Operations 29LV401T/B-70 29LV401T/B-90 SYMBOL PARAMETER MIN. MIN. tWC Write Cycle Time (Note 1) 70 90 ns tAS Address Setup Time 0 0 ns tAH Address Hold Time 45 45 ns tDS Data Setup Time 35 45 ns tDH Data Hold Time 0 0 ns tOES Output Enable Setup Time 0 0 ns tGHWL Read Recovery Time Before Write 0 0 ns MAX. MAX. UNIT (OE High to WE Low) tCS CE Setup Time 0 0 ns tCH CE Hold Time 0 0 ns tWP Write Pulse Width 35 35 ns tWPH Write Pulse Width High 30 30 ns 9/11(TYP.) 9/11(TYP.) us tWHWH2 Sector Erase Operation (Note 2) 0.7(TYP.) 0.7(TYP.) sec tVCS VCC Setup Time (Note 1) 50 50 us tRB Recovery Time from RY/BY 0 0 ns tBUSY Program/Erase Vaild to RY/BY Delay tWHWH1 Programming Operation (Note 2) (Byte/Word program time) 90 90 us NOTES: 1. Not 100% tested. 2. See the "Erase and Programming Performance" section for more information. P/N:PM0853 REV. 0.2, JUL. 03, 2002 23 MX29LV401T/B AC CHARACTERISTICS TA = -40oC to 85oC, VCC = 2.7V~3.6V Table 12. Alternate CE Controlled Erase/Program Operations 29LV401T/B-70 29LV401T/B-90 SYMBOL PARAMETER MIN. MIN. tWC Write Cycle Time (Note 1) 70 70 ns tAS Address Setup Time 0 0 ns tAH Address Hold Time 45 45 ns tDS Data Setup Time 35 45 ns tDH Data Hold Time 0 0 ns tOES Output Enable Setup Time 0 0 ns tGHEL Read Recovery Time Before Write 0 0 ns tWS WE Setup Time 0 0 ns tWH WE Hold Time 0 0 ns tCP CE Pulse Width 35 35 ns tCPH CE Pulse Width High 30 30 ns Byte 9(Typ.) 9(Typ.) us Word 11(Typ.) 11(Typ.) us 0.7(Typ.) 0.7(Typ.) sec tWHWH1 Programming Operation(note2) tWHWH2 Sector Erase Operation (note2) MAX. MAX. UNIT NOTE: 1. Not 100% tested. 2. See the "Erase and Programming Performance" section for more information. P/N:PM0853 REV. 0.2, JUL. 03, 2002 24 MX29LV401T/B Figure 4. COMMAND WRITE TIMING WAVEFORM VCC Addresses 3V VIH ADD Valid VIL tAH tAS WE VIH VIL tOES tWPH tWP tCWC CE VIH VIL tCS OE tCH VIH VIL tDS tDH VIH Data DIN VIL P/N:PM0853 REV. 0.2, JUL. 03, 2002 25 MX29LV401T/B AUTOMATIC PROGRAMMING TIMING WAVEFORM after automatic programming starts. Device outputs DATA during programming and DATA after programming on Q7.(Q6 is for toggle bit; see toggle bit, DATA polling, timing waveform) One byte data is programmed. Verify in fast algorithm and additional verification by external control are not required because these operations are executed automatically by internal control circuit. Programming completion can be verified by DATA polling and toggle bit checking Figure 5. AUTOMATIC PROGRAMMING TIMING WAVEFORM Program Command Sequence(last two cycle) tWC 555h Address Read Status Data (last two cycle) tAS PA PA PA tAH CE tCH tGHWL OE tWHWH1 tWP WE tCS tWPH tDS tDH A0h Status PD DOUT Data tBUSY tRB RY/BY tVCS VCC NOTES: 1.PA=Program Address, PD=Program Data, DOUT is the true data the program address P/N:PM0853 REV. 0.2, JUL. 03, 2002 26 MX29LV401T/B Figure 6. AUTOMATIC PROGRAMMING ALGORITHM FLOWCHART START Write Data AAH Address 555H Write Data 55H Address 2AAH Write Data A0H Address 555H Write Program Data/Address Data Poll from system Increment Address No Verify Word Ok ? YES No Last Address ? YES Auto Program Completed P/N:PM0853 REV. 0.2, JUL. 03, 2002 27 MX29LV401T/B Figure 7. CE CONTROLLED PROGRAM TIMING WAVEFORM 555 for program 2AA for erase PA for program SA for sector erase 555 for chip erase Data Polling Address PA tWC tAS tAH tWH WE tGHEL OE tCP tWHWH1 or 2 CE tWS tCPH tDS tBUSY tDH DQ7 DOUT Data tRH A0 for program 55 for erase PD for program 30 for sector erase 10 for chip erase RESET RY/BY NOTES: 1.PA=Program Address, PD=Program Data, DOUT=Data Out, DQ7=complement of data written to device. 2.Figure indicates the last two bus cycles of the command sequence. P/N:PM0853 REV. 0.2, JUL. 03, 2002 28 MX29LV401T/B AUTOMATIC CHIP ERASE TIMING WAVEFORM All data in chip are erased. External erase verification is not required because data is verified automatically by internal control circuit. Erasure completion can be verified by DATA polling and toggle bit checking after auto- matic erase starts. Device outputs 0 during erasure and 1 after erasure on Q7.(Q6 is for toggle bit; see toggle bit, DATA polling, timing waveform) Figure 8. AUTOMATIC CHIP ERASE TIMING WAVEFORM Erase Command Sequence(last two cycle) tWC 2AAh Address Read Status Data tAS VA 555h VA tAH CE tCH tGHWL OE tWHWH2 tWP WE tCS tWPH tDS tDH 55h In Progress Complete 10h Data tBUSY tRB RY/BY tVCS VCC NOTES: SA=sector address(for Sector Erase), VA=Valid Address for reading status data(see "Write Operation Status"). P/N:PM0853 REV. 0.2, JUL. 03, 2002 29 MX29LV401T/B Figure 9. AUTOMATIC CHIP ERASE ALGORITHM FLOWCHART START Write Data AAH Address 555H Write Data 55H Address 2AAH Write Data 80H Address 555H Write Data AAH Address 555H Write Data 55H Address 2AAH Write Data 10H Address 555H Data Pall from System NO Data=FFh ? YES Auto Chip Erase Completed P/N:PM0853 REV. 0.2, JUL. 03, 2002 30 MX29LV401T/B AUTOMATIC SECTOR ERASE TIMING WAVEFORM Sector indicated by A12 to A17 are erased. External erase verify is not required because data are verified automatically by internal control circuit. Erasure completion can be verified by DATA polling and toggle bit check- ing after automatic erase starts. Device outputs 0 during erasure and 1 after erasure on Q7.(Q6 is for toggle bit; see toggle bit, DATA polling, timing waveform) Figure 10. AUTOMATIC SECTOR ERASE TIMING WAVEFORM Erase Command Sequence(last two cycle) tWC 2AAh Address Read Status Data tAS VA SA VA tAH CE tCH tGHWL OE tWHWH2 tWP WE tCS tWPH tDS tDH 55h In Progress Complete 30h Data tBUSY tRB RY/BY tVCS VCC NOTES: SA=sector address(for Sector Erase), VA=Valid Address for reading status data(see "Write Operation Status"). P/N:PM0853 REV. 0.2, JUL. 03, 2002 31 MX29LV401T/B Figure 11. AUTOMATIC SECTOR ERASE ALGORITHM FLOWCHART START Write Data AAH Address 555H Write Data 55H Address 2AAH Write Data 80H Address 555H Write Data AAH Address 555H Write Data 55H Address 2AAH Write Data 30H Sector Address Last Sector to Erase NO YES Data Poll from System NO Data=FFh YES Auto Sector Erase Completed P/N:PM0853 REV. 0.2, JUL. 03, 2002 32 MX29LV401T/B Figure 12. ERASE SUSPEND/ERASE RESUME FLOWCHART START Write Data B0H NO ERASE SUSPEND Toggle Bit checking Q6 not toggled YES Read Array or Program Reading or Programming End NO YES Write Data 30H ERASE RESUME Continue Erase Another Erase Suspend ? NO YES P/N:PM0853 REV. 0.2, JUL. 03, 2002 33 MX29LV401T/B Figure 13. IN-SYSTEM SECTOR PROTECT/UNPROTECT TIMING WAVEFORM (RESET Control) VID VIH RESET SA, A6 A1, A0 Valid* Valid* Sector Protect or Sector Unprotect Data 60h 1us 60h Valid* Verify 40h Status Sector Protect =150us Sector Unprotect =15ms CE WE OE Note: When sector protect, A6=0, A1=1, A0=0. When sector unprotect, A6=1, A1=1, A0=0. P/N:PM0853 REV. 0.2, JUL. 03, 2002 34 MX29LV401T/B Figure 14. SECTOR PROTECT TIMING WAVEFORM(A9, OE Control) A1 A6 12V 3V A9 tVLHT Verify 12V 3V OE tVLHT tVLHT tWPP 1 WE tOESP CE Data 01H F0H tOE A18-A12 Sector Address P/N:PM0853 REV. 0.2, JUL. 03, 2002 35 MX29LV401T/B Figure 15. SECTOR PROTECTION ALGORITHM (A9, OE Control) START Set Up Sector Addr PLSCNT=1 OE=VID,A9=VID,CE=VIL A6=VIL Activate WE Pulse Time Out 150us Set WE=VIH, CE=OE=VIL A9 should remain VID Read from Sector Addr=SA, A1=1 No PLSCNT=32? . No Data=01H? Yes Device Failed Protect Another Sector? Yes Remove VID from A9 Write Reset Command Sector Protection Complete P/N:PM0853 REV. 0.2, JUL. 03, 2002 36 MX29LV401T/B Figure 16. IN-SYSTEM SECTOR PROTECTION ALGORITHM WITH RESET=VID START PLSCNT=1 RESET=VID Wait 1us First Write Cycle=60H No Temporary Sector Unprotect Mode Yes Set up sector address Write 60H to sector address with A6=0, A1=1, A0=0 Wait 150us Verify sector protect : write 40H with A6=0, A1=1, A0=0 Increment PLSCNT Reset PLSCNT=1 Read from sector address No PLSCNT=25? Yes Device failed No Data=01H ? Yes Protect another sector? Yes No Remove VID from RESET Write reset command Sector protect complete P/N:PM0853 REV. 0.2, JUL. 03, 2002 37 MX29LV401T/B Figure 17. IN-SYSTEM SECTOR UNPROTECTION ALGORITHM WITH RESET=VID START PLSCNT=1 RESET=VID Wait 1us First Write Cycle=60H ? No Temporary Sector Unprotect Mode Yes All sector protected? No Protect all sectors Yes Set up first sector address Sector unprotect : write 60H with A6=1, A1=1, A0=0 Wait 50ms Verify sector unprotect write 40H to sector address with A6=1, A1=1, A0=0 Increment PLSCNT Read from sector address with A6=1, A1=1, A0=0 No PLSCNT=1000? Yes Device failed No Set up next sector address Data=00H ? Yes Last sector verified? Yes No Remove VID from RESET Write reset command Sector unprotect complete P/N:PM0853 REV. 0.2, JUL. 03, 2002 38 MX29LV401T/B Figure 18. TIMING WAVEFORM FOR CHIP UNPROTECTION (A9, OE Control) A1 12V 3V A9 tVLHT A6 Verify 12V 3V OE tVLHT tVLHT tWPP 2 WE tOESP CE Data 00H F0H tOE A17-A12 Sector Address Notes: tWPP1 (Write pulse width for sector protect)=100ns min. tWPP2 (Write pulse width for sector unprotect)=100ns min. P/N:PM0853 REV. 0.2, JUL. 03, 2002 39 MX29LV401T/B Figure 19. CHIP UNPROTECTION ALGORITHM (A9, OE Control) START Protect All Sectors PLSCNT=1 Set OE=A9=VID CE=VIL,A6=1 Activate WE Pulse Time Out 50ms Increment PLSCNT Set OE=CE=VIL A9=VID,A1=1 Set Up First Sector Addr Read Data from Device No Data=00H? Increment Sector Addr No PLSCNT=1000? Yes Yes No All sectors have been verified? Device Failed Yes Remove VID from A9 Write Reset Command Chip Unprotect Complete * It is recommended before unprotect whole chip, all sectors should be protected in advance. P/N:PM0853 REV. 0.2, JUL. 03, 2002 40 MX29LV401T/B WRITE OPERATION STATUS Figure 20. DATA POLLING ALGORITHM Start Read Q7~Q0 Add.=VA(1) Yes Q7 = Data ? No No Q5 = 1 ? Yes Read Q7~Q0 Add.=VA Yes Q7 = Data ? (2) No FAIL Pass NOTE : 1.VA=Valid address for programming 2.Q7 should be re-checked even Q5="1" because Q7 may change simultaneously with Q5. P/N:PM0853 REV. 0.2, JUL. 03, 2002 41 MX29LV401T/B Figure 21. TOGGLE BIT ALGORITHM Start Read Q7-Q0 Read Q7-Q0 Toggle Bit Q6 = Toggle ? (Note 1) NO YES NO Q5= 1? YES Read Q7~Q0 Twice (Note 1,2) Toggle bit Q6= Toggle? NO YES Program/Erase Operation Not Complete,Write Reset Command Program/Erase operation Complete Note:1.Read toggle bit twice to determine whether or not it is toggling. 2. Recheck toggle bit because it may stop toggling as Q5 change to "1". P/N:PM0853 REV. 0.2, JUL. 03, 2002 42 MX29LV401T/B Figure 22. DATA POLLING TIMINGS (DURING AUTOMATIC ALGORITHMS) tRC Address VA VA VA tACC tCE CE tCH tOE OE tOEH tDF WE tOH DQ7 Complement Complement True Valid Data Q0-Q6 Status Data Status Data True Valid Data High Z High Z tBUSY RY/BY NOTES: 1. VA=Valid address. Figure shows are first status cycle after command sequence, last status read cycle, and array data read cycle. 2. CE must be toggled when DATA polling. P/N:PM0853 REV. 0.2, JUL. 03, 2002 43 MX29LV401T/B Figure 23. TOGGLE BIT TIMING WAVEFORMS (DURING AUTOMATIC ALGORITHMS) tRC VA VA Address VA VA tACC tCE CE tCH tOE OE tDF tOEH WE tOH High Z Q6/Q2 Valid Status Valid Data (second read) (stops toggling) Valid Status (first raed) Valid Data tBUSY RY/BY NOTES: 1. VA=Valid address; not required for Q6. Figure shows first two status cycle after command sequence, last status read cycle, and array data read cycle. 2. CE must be toggled when toggle bit toggling. P/N:PM0853 REV. 0.2, JUL. 03, 2002 44 MX29LV401T/B Table 13. AC CHARACTERISTICS Parameter Std Description Test Setup All Speed Options Unit tREADY1 RESET PIN Low (During Automatic Algorithms) MAX 20 us MAX 500 ns to Read or Write (See Note) tREADY2 RESET PIN Low (NOT During Automatic Algorithms) to Read or Write (See Note) tRP RESET Pulse Width (During Automatic Algorithms) MIN 500 ns tRH RESET High Time Before Read(See Note) MIN 50 ns tRB RY/BY Recovery Time(to CE, OE go low) MIN 0 ns Note:Not 100% tested Figure 24. RESET TIMING WAVEFORM RY/BY CE, OE tRH RESET tRP tReady2 Reset Timing NOT during Automatic Algorithms tReady1 RY/BY tRB CE, OE RESET tRP Reset Timing during Automatic Algorithms P/N:PM0853 REV. 0.2, JUL. 03, 2002 45 MX29LV401T/B AC CHARACTERISTICS WORD/BYTE CONFIGURATION (BYTE) Parameter JEDEC Description Speed Options Std -70 Unit -90 tELFL/tELFH CE to BYTE Switching Low or High Max 5 ns tFLQZ BYTE Switching Low to Output HIGH Z Max 25 30 ns tFHQV BYTE Switching High to Output Active Min 70 90 ns Figure 25. BYTE TIMING WAVEFORM FOR READ OPERATIONS (BYTE switching from byte mode to word mode) CE OE tELFH BYTE Q0~Q14 DOUT (Q0-Q7) Q15/A-1 VA DOUT (Q0-Q14) DOUT (Q15) tFHQV P/N:PM0853 REV. 0.2, JUL. 03, 2002 46 MX29LV401T/B Figure 26. BYTE TIMING WAVEFORM FOR READ OPERATIONS (BYTE switching from word mode to byte mode) CE OE tELFH BYTE DOUT (Q0-Q14) Q0~Q14 DOUT (Q15) Q15/A-1 DOUT (Q0-Q7) VA tFLQZ Figure 27. BYTE TIMING WAVEFORM FOR PROGRAM OPERATIONS CE The falling edge of the last WE signal WE BYTE tAS P/N:PM0853 tAH REV. 0.2, JUL. 03, 2002 47 MX29LV401T/B Table 14. TEMPORARY SECTOR UNPROTECT Parameter Std. Description Test Setup All Speed Options Unit tVIDR VID Rise and Fall Time (See Note) Min 500 ns tRSP RESET Setup Time for Temporary Sector Unprotect Min 4 us Note: Not 100% tested Figure 28. TEMPORARY SECTOR UNPROTECT TIMING DIAGRAM 12V RESET 0 or Vcc 0 or Vcc Program or Erase Command Sequence tVIDR tVIDR CE WE tRSP RY/BY Figure 29. Q6 vs Q2 for Erase and Erase Suspend Operations Enter Embedded Erasing Erase Suspend Enter Erase Suspend Program Erase WE Erase Resume Erase Suspend Program Erase Suspend Read Erase Erase Complete Q6 Q2 NOTES: The system can use OE or CE to toggle Q2/Q6, Q2 toggles only when read at an address within an erase-suspended P/N:PM0853 REV. 0.2, JUL. 03, 2002 48 MX29LV401T/B Figure 30. TEMPORARY SECTOR UNPROTECT ALGORITHM Start RESET = VID (Note 1) Perform Erase or Program Operation Operation Completed RESET = VIH Temporary Sector Unprotect Completed(Note 2) Note : 1. All protected sectors are temporary unprotected. VID=11.5V~12.5V 2. All previously protected sectors are protected again. P/N:PM0853 REV. 0.2, JUL. 03, 2002 49 MX29LV401T/B Figure 31. ID CODE READ TIMING WAVEFORM VCC 3V VID VIH ADD A9 ADD A0 VIL VIH VIL tACC tACC VIH A1 VIL ADD A2-A8 A10-A17 CE VIH VIL VIH VIL WE VIH tCE VIL OE VIH tOE VIL tDF tOH tOH VIH DATA Q0-Q15 DATA OUT DATA OUT VIL C2H/00C2H B9H/BAH (Byte) 22B9H/22BAH (Word) P/N:PM0853 REV. 0.2, JUL. 03, 2002 50 MX29LV401T/B Table 15. ERASE AND PROGRAMMING PERFORMANCE(1) LIMITS TYP.(2) MAX.(3) UNITS Sector Erase Time 0.7 15 sec Chip Erase Time 11 Byte Programming Time 9 300 us Word Programming Time 11 360 us Byte Mode 4.5 13.5 sec Word Mode 3 9 sec PARAMETER Chip Programming Time MIN. Erase/Program Cycles Note: sec 100,000 Cycles 1.Not 100% Tested, Excludes external system level over head. 2.Typical values measured at 25C, 3V. 3.Maximum values measured at 25C, 2.7V. Table 16. LATCH-UP CHARACTERISTICS MIN. MAX. Input Voltage with respect to GND on all pins except I/O pins -1.0V 12.5V Input Voltage with respect to GND on all I/O pins -1.0V Vcc + 1.0V -100mA +100mA Test Conditions Min Unit 150C 10 Years 125C 20 Years Current Includes all pins except Vcc. Test conditions: Vcc = 3.0V, one pin at a time. Table 17. DATA RETENTION Parameter Description Data Retention Time P/N:PM0853 REV. 0.2, JUL. 03, 2002 51 MX29LV401T/B ORDERING INFORMATION PLASTIC PACKAGE PART NO. MX29LV401TMC-70 MX29LV401BMC-70 MX29LV401TMC-90 MX29LV401BMC-90 MX29LV401TTC-70 ACCESS TIME (ns) 70 70 90 90 70 OPERATING CURRENT STANDBY CURRENT MAX.(mA) MAX.(uA) 30 5 30 5 30 5 30 5 30 5 MX29LV401BTC-70 70 30 5 MX29LV401TTC-90 90 30 5 MX29LV401BTC-90 90 30 5 MX29LV401TXBC-70 MX29LV401BXBC-70 MX29LV401TXBC-90 MX29LV401BXBC-90 MX29LV401TMI-70 MX29LV401BMI-70 MX29LV401TMI-90 MX29LV401BMI-90 MX29LV401TTI-70 70 70 90 90 70 70 90 90 70 30 30 30 30 30 30 30 30 30 5 5 5 5 5 5 5 5 5 MX29LV401BTI-70 70 30 5 MX29LV401TTI-90 90 30 5 MX29LV401BTI-90 90 30 5 MX29LV401TXBI-70 MX29LV401TXBI-90 MX29LV401BXBI-70 MX29LV401BXBI-90 70 90 70 90 30 30 30 30 5 5 5 5 P/N:PM0853 PACKAGE 44 Pin SOP 44 Pin SOP 44 Pin SOP 44 Pin SOP 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Ball CSP 48 Ball CSP 48 Ball CSP 48 Ball CSP 44 Pin SOP 44 Pin SOP 44 Pin SOP 44 Pin SOP 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Pin TSOP (Normal Type) 48 Ball CSP 48 Ball CSP 48 Ball CSP 48 Ball CSP REV. 0.2, JUL. 03, 2002 52 MX29LV401T/B PACKAGE INFORMATION 48-PIN PLASTIC TSOP P/N:PM0853 REV. 0.2, JUL. 03, 2002 53 MX29LV401T/B 44-PIN PLASTIC SOP P/N:PM0853 REV. 0.2, JUL. 03, 2002 54 MX29LV401T/B 48-Ball CSP P/N:PM0853 REV. 0.2, JUL. 03, 2002 55 MX29LV401T/B REVISION HISTORY Revision No. Description 0.1 1. To cancel the VLKO function & spec. 2. To modify table 3. Autoselect Mode Operation 3. To added data retention information 0.2 1. Added notes to define CE operation in Data polling timing waveform and toggle bit timing waveform 2. To redefine tCH timing to "between 90% of WE and 10% of CE rising" P/N:PM0853 Page P1,19 P6 P1,51 P43,44 Date APR/18/2002 JUL/03/2002 P26,29,31,43,44 REV. 0.2, JUL. 03, 2002 56 MX29LV401T/B MACRONIX INTERNATIONAL CO., LTD. HEADQUARTERS: TEL:+886-3-578-6688 FAX:+886-3-563-2888 EUROPE OFFICE: TEL:+32-2-456-8020 FAX:+32-2-456-8021 JAPAN OFFICE: TEL:+81-44-246-9100 FAX:+81-44-246-9105 SINGAPORE OFFICE: TEL:+65-348-8385 FAX:+65-348-8096 TAIPEI OFFICE: TEL:+886-2-2509-3300 FAX:+886-2-2509-2200 MACRONIX AMERICA, INC. TEL:+1-408-453-8088 FAX:+1-408-453-8488 CHICAGO OFFICE: TEL:+1-847-963-1900 FAX:+1-847-963-1909 http : //www.macronix.com MACRONIX INTERNATIONAL CO., LTD. reserves the right to change product and specifications without notice.