MX29F022T

INDEX ADVANCED INFORMATION MX29F022T/B 2M-BIT[256K x 8]CMOS FLASH MEMORY FEATURES • 262,144x 8 only • Fast access time: 70/90/120ns • Low power consumption -30mA maximum active current -1µA typical standby current Programming and erasing voltage 5V±10% Command register architecture -Byte Programming (7us typical) -Block Erase (16K-Byte x1, 8K-Byte x 2, 32K-Byte x1, and 64K-Byte x 3) Auto Erase (chip & block) and Auto Program -Automatically erase any combination of sectors or the whole chip with Erase Suspend capability. -Automatically programs and verifies data atspecified address Erase Suspend/Erase Resume -Suspends an erase operation to read data from, or program data to, a sector that is not being erased, then resumes the erase operation. • Status Reply • • • • -Data polling & Toggle bit for detection of program and erase cycle completion. Chip protect/unprotect for 5V only system or 5V/12V system 100,000 minimum erase/program cycles Latch-up protected to 100mA from -1 to VCC+1V Boot Code Sector Architecture -T = Top Boot Sector -B = Bottom Boot Sector Hardware RESET pin -Resets internal state machine to read mode Low VCC write inhibit is equal to or less than 3.2V Package type: -32-pin PDIP -32-pin PLCC -32-pin TSOP (Type 1) • • • • • • • GENERAL DESCRIPTION The MX29F022T/B is a 2-mega bit Flash memory organized as 256K bytes of 8 bits only. MXIC's Flash memories offer the most cost-effective and reliable read/ write non-volatile random access memory.The MX29F022T/B is packaged in 32-pin PDIP, PLCC and 32-pin TSOP(I). It is designed to be reprogrammed and erased in-system or in-standard EPROM programmers. The standard MX29F022T/B offers access time as fast as 70ns, allowing operation of high-speed microproc essors without wait states. To eliminate bus contention, the MX29F022T/B has separate chip enable (CE) and output enable (OE) controls. MXIC's Flash memories augment EPROM functionality with in-circuit electrical erasure and programming. The MX29F022T/B uses a command register to manage this functionality. The command register allows for 100% TTL level control inputs and fixed power supply levels during erase and programming, while maintaining maximum EPROM compatibility. MXIC's 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 programming operations produces reliable cycling. The MX29F022T/ B uses a 5.0V ± 10% VCC supply to perform the High Reliability Erase and auto Program/Erase algorithms. 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. P/N:PM0556 REV. 0.6, DEC. 09, 1998 1 INDEX MX29F022T/B PIN CONFIGURATIONS 32 PDIP RESET A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC WE A17 A14 A13 A8 A9 A11 OE A10 CE Q7 Q6 Q5 Q4 Q3 A11 A9 A8 A13 A14 A17 WE VCC RESET A16 A15 A12 A7 A6 A5 A4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 OE A10 CE Q7 Q6 Q5 Q4 Q3 GND Q2 Q1 Q0 A0 A1 A2 A3 32 TSOP (TYPE 1) MX29F022T/B MX29F022T/B (NORMAL TYPE) 32 PLCC RESET VCC A12 A15 A16 A17 WE BLOCK STRUCTURE A14 A13 A8 A9 A7 A6 A5 A4 A3 A2 A1 A0 Q0 5 4 1 32 30 29 A17~A0 3FFFFH 3BFFFH 16 K-BYTE (BOOT SECTOR) 8 K-BYTE K-BYTE K-BYTE K-BYTE K-BYTE K-BYTE 9 MX29F022T/B 25 A11 OE A10 CE 39FFFH 8 37FFFH 2FFFFH 64 1FFFFH 64 0FFFFH 64 00000H 32 13 14 Q1 Q2 VSS 17 Q3 Q4 Q5 21 20 Q6 Q7 PIN DESCRIPTION: A17~A0 MX29F022T Sector Architecture SYMBOL A0~A17 Q0~Q7 CE WE RESET OE VCC GND PIN NAME Address Input Data Input/Output Chip Enable Input Write Enable Input Hardware Reset Pin/Sector Protect Unlock Output Enable Input Power Supply Pin (+5V) Ground Pin 3FFFFH 64 2FFFFH 64 1FFFFH 0FFFFH 07FFFH 05FFFH 03FFFH 00000H 8 8 K-BYTE K-BYTE 64 32 K-BYTE K-BYTE K-BYTE K-BYTE 16 K-BYTE (BOOT SECTOR) MX29F022B Sector Architecture P/N:PM0556 REV. 0.6, DEC. 09, 1998 2 INDEX MX29F022T/B Block Diagram CONTROL CE OE WE RESET INPUT LOGIC WRITE PROGRAM/ERASE STATE HIGH VOLTAGE MACHINE (WSM) STATE MX29F022T/B FLASH ARRAY ARRAY SOURCE HV REGISTER X-DECODER ADDRESS LATCH A0-A17 AND BUFFER Y-DECODER Y-PASS GATE COMMAND DATA DECODER SENSE AMPLIFIER PGM DATA HV COMMAND DATA LATCH PROGRAM DATA LATCH Q0-Q7 I/O BUFFER P/N:PM0556 REV. 0.6, DEC. 09, 1998 3 INDEX MX29F022T/B AUTOMATIC PROGRAMMING The MX29F022T/B is byte programmable using the Automatic Programming algorithm. The Automatic Programming algorithm does not require the system to time out or verify the data programmed. The typical chip programming time of the MX29F022T/B at room temperature is less than 2 seconds. AUTOMATIC ERASE ALGORITHM 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, verifily the erase, and counts the number of sequences. A status bit similar to DATA polling and status bit toggling between consecutive read cycles prodvides feedback to the user as to the status of the programming operation. Commands are written to the command register using standard microprocessor write timings. Register contents serve as inputs to an internal state-machine 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 . MXIC's Flash technology combines years of EPROM experience to produce the highest levels of quality, reliability, and cost effectiveness. The MX29F022T/B electrically erases all bits simultaneously using FowlerNordheim tunneling. The bytes are programmed one byte at a time using the EPROM programming mechanism of hot electron injection. 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 CHIP ERASE The entire chip is bulk erased using 10ms erase pulses according to MXIC's High Reliability Chip Erase algorithm. Typical erasure at room temperature is accomplished in less than two second. The device is erased using the Automatic Erase algorithm. The Automatic Erase algorithm automatically programs the entire array prior to electrical erase. The timing and verification of electrical erase are internally controlled within the device. AUTOMATIC BLOCK ERASE The MX29F022T/B is block(s) erasable using MXIC's Auto Block Erase algorithm. Block erase modes allow blocks of the array to be erased in one erase cycle. The Automatic Block Erase algorithm automatically programs the specified block(s) prior to electrical erase. The timing and verification of electrical erase are internally controlled by the device. AUTOMATIC PROGRAMMING ALGORITHM MXIC's Automatic Programming algorithm requires the user to only write a program set-up commands (include 2 unlock arite cycle and A0H) include 2 unlock arite cycle and A0H and a program command (program data and address). The device automatically times the programming pulse width, verifies the program verification, and counts the number of sequences. A status bit similar to DATA polling and a status bit toggling between consecutive read cycles, provides feedback to the user as to the status of the programming operation. P/N:PM0556 REV. 0.6, DEC. 09, 1998 4 INDEX MX29F022T/B Table 1 Softwave Command Definitions Command Reset/Read Reset/Read Read Silicon ID Chip Protect Verify Porgram Chip Erase Sector Erase Sector Erase Suspend Sector Erase Resume Unlock for chip protect/unprotect First Bus Bus Cycle Cycle Addr Data 1 XXXH F0H 4 555H AAH 4 555H AAH 4 555H AAH 4 6 6 1 1 6 555H 555H 555H XXXH XXXH 555H AAH AAH AAH B0H 30H AAH Second Bus Third Bus Fourth Bus Fifth Bus Sixth Bus Cycle Cycle Cycle Cycle Cycle Addr Data Addr Data Addr Data Addr Data Addr Data 2AAH 55H 2AAH 55H 2AAH 55H 2AAH 55H 2AAH 55H 2AAH 55H 555H F0H RA 555H 90H ADI 555H 90H SA x02 555H A0H PA 555H 80H 555H 555H 80H 555H RD DDI 00H 01H PD AAH 2AAH 55H 555H 10H AAH 2AAH 55H SA 30H 2AAH 55H 555H 80H 555H AAH 2AAH 55H 555H 20H Note: 1. ADI = Address of Device identifier; A1=0,A0 =0 for manufacture code,A1=0, A0 =1 for device code (Refer to Table 3). DDI = Data of Device identifier : C2H for manufacture code, 36H/37H 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 to the sector to be erased. 3. The system should generate the following address patterns: 555H or 2AAH to Address A0~A10. 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 Chip Protect Verify operation:If read out data is 01H, it means the chip has been protected. If read out data is 00H, it means the chip is still not being protected. P/N:PM0556 REV. 0.6, DEC. 09, 1998 5 INDEX MX29F022T/B TABLE 2. MX29F022T/B BUS OPERATION Pins Mode Read Silicon ID Manfacturer Code(1) Read Silicon ID Device Code(1) Read Standby Output Disable Write Chip Protect with 12V system(6) Chip Unprotect with 12V system(6) Verify chip Protect Code(5) with 12V system Chip Protect without 12V system (6) Chip Unprotect without 12V system (6) Verify Chip Protect/Unprotect without 12V system (7) Reset CE L L L H L L L L OE L L L X H H VID(2) VID(2) L L L L X H H L X WE H H H X H L L L L L L H X A0 L H A0 X X A0 X X H X X X X A1 L L A1 X X A1 X X X X X H X A6 X X A6 X X A6 L H H L H X X A9 VID(2) VID(2) A9 X X A9 VID(2) VID(2) X H H H X Q0~Q7 C2H 36H/37H DOUT HIGH Z HIGH Z DIN(3) X X VID(2) X X Code(5) HIGH Z NOTES: 1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 1. 2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V. 3. Refer to Table 1 for valid Data-In during a write operation. 4. X can be VIL or VIH. 5. Code=00H means unprotected. Code=01H means protected. 6. Refer to chip protect/unprotect algorithm and waveform. Must issue "unlock for chip protect/unprotect" command before "chip protect/unprotect without 12V system" command. 7. The "verify chip protect/unprotect without 12V sysytem" is only following "chip protect/unprotect without 12V system" command. P/N:PM0556 REV. 0.6, DEC. 09, 1998 6 INDEX MX29F022T/B 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. 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. SET-UP AUTOMATIC CHIP/BLOCK ERASE COMMANDS 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. 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 verification begin. The erase and verification 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. 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 verify command is required). If the Erase operation was unsuccessful, the data on Q5 is "1"(see Table 4), indicating the erase operation of exceed internal timing limit. The automatic erase begins on the rising edge of the last WE pulse 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. However, multiplexing high voltage onto address lines is not generally desired system design practice. The MX29F022T/B contains a Silicon-ID-Read operation to supplement 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. A read cycle with A1=VIL, A0=VIH returns the device code of 36H for MX29F022T,37H for MX29F022B. TABLE 3. EXPANDED SILICON ID CODE Pins Manufacture code Device code for MX29F022T Device code for MX29F022B Chip Protection Verification A0 VIL VIH VIH X X A1 VIL VIL VIL VIH VIH Q7 1 1 0 0 0 Q6 1 0 0 0 0 Q5 0 1 1 0 0 Q4 0 1 1 0 0 Q3 0 0 0 0 0 Q2 0 0 1 0 0 Q1 1 0 0 0 0 Q0 0 0 0 1 0 Code(Hex) C2H 36H 37H 01H (Protected) 00H (Unprotected) P/N:PM0556 REV. 0.6, DEC. 09, 1998 7 INDEX MX29F022T/B SET-UP AUTOMATIC BLOCK ERASE COMMANDS The Automatic Block Erase does not require the device to be entirely pre-programmed prior to executing the Automatic Set-up Block Erase command and Automatic Block Erase command. Upon executing the Automatic Block Erase command, the device will automatically program and verify the block(s) memory for an all-zero data pattern. The system does not require to provide any control or timing during these operations. When the block(s) is automatically verified to contain an all-zero pattern,a self-timed block erase and verification begin. The erase and verification 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 does not required to provide any control or timing during these operations. When using the Automatic Block 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). Sector 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 sector erase command-30H. The sector address is latched on the falling edge of WE, while the command(data) is latched on the rising edge Table 4. Write Operation Status Mode Standard Mode Auto Program Algorithm Auto Erase Algorithm Exceed Time Limits Auto Program Auto Sector/Chip Erase Erase Suspend Mode Reading within Erase Suspended Sector Reading within Non-Erase Suspended Sector Earse-Suspend-Program Q7 (Note 1) Q7 0 Q7 0 1 Data Q7 Q6 Toggle Toggle Toggle Toggle No toggle Data Toggle Q5 (Note 2) 0 0 1 1 0 Data 0 Q3 N/A 1 0 0 N/A Data N/A Q2 (Note 1) No Toggle Toggle No Toggle N/A Toggle Data N/A of WE. Block addresses selected are loaded into internal register on the sixth falling edge of WE. Each successive block load cycle started by the falling edge of WE must begin within 30ms from the rising edge of the preceding WE. Otherwise, the loading period ends and internal auto block 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 Block Erase (30H) or Erase Suspend (B0H) during the time-out period resets the device to read mode. ERASE SUSPEND This command is only valid while the state machine is executing Automatic Block Erase operation, and therefore will only be responded during Automatic/Block Erase operation. Writing the Erase Suspend command during the Block Erase time-out 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. 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-suspendend program operation is complete, the system can once again read array data within non-suspended blocks. 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:PM0556 REV. 0.6, DEC. 09, 1998 8 INDEX MX29F022T/B 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. While the Automatic Erase algorithm is in operation, Q7 will read "0" until the erase operation is compete. Upon completion of the erase operation, the data on Q7 will read "1". The Data Polling feature is valid after the rising edge of the secone WE pulse of two write pulse sequences. The Data Polling feature is active during Automatic Program/Erase algorithm or sector erase time-out.(see section Q3 Sector Erase Timer) SET-UP 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. 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 pulse. The rising edge of WE also begins the programming operation. The system does not require to provide further controls or timings. The device will automatically provide an adequate internally generated program pulse and verify margin. If the program opetation was unsuccessful, the data on Q5 is "1", indicating the program operation of internally exceed timing limit. The automatic programming operation is complete 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). Q6:Toggle BIT I The MX29F022T/B features a "Toggle Bit" as a method to indicate to the host system that the Auto Program/ Erase algorithms are either in progress or complete. 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 the chip is protected, Q6 toggles and returns to reading array data. 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(see the subsection on Q7:Data Polling). If a program address falls within a protected sector, Q6 toggles for approximately 2us after the program command sequence is written, then returns to reading array data. Q6 also toggles during the erase-suspend-program mode, and stops toggling once the Automatic Program algorithm is complete. The Write Operation Status table shows the outputs for Toggle Bit I on Q6. Refer to the toggle bit algorithmg. WRITE OPERATION STATUS DATA POLLING-Q7 The MX29F022T/B also features Data Polling as a method to indicate to the host system that the Automatic Program or Erase algorithms are either in progress or completed. While the Automatic Programming algorithm is in operation, an attempt to read the device will produce the complement data of the data last written to Q7. Upon completion of the Automatic Program Algorithm an attempt to read the device will produce the true data last written to Q7. The Data Polling feature is valid after the rising edge of the second WE pulse of the two write pulse sequences. P/N:PM0556 REV. 0.6, DEC. 09, 1998 9 INDEX MX29F022T/B Q2:Toggle Bit II The "Toggle Bit II" on Q2, when used with Q6, indicates whether a particular sector is actively eraseing (that is, the Automatic Erase alorithm is in process), or whether that sector is erase-suspended. Toggle Bit I is valid after the rising edge of the final WE pulse in the command sequence. 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 4 to compare outputs for Q2 and Q6. 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(top of the toggle bit algorithm flow chart). 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 e condition indicates that the program or erase cycle was not successfully completed. Data Polling and Toggle Bit are the only operating functions not of the device under this condition. 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. 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). The time-out condition may also appear if a user tries to program a non blank location without erasing. In this case the device locks out and never completes the Automatic Algorithm operation. Hence, the system never reads a valid data on Q7 bit and Q6 never stops toggling. Once the Device has exceeded timing limits, the Q5 bit will indicate a "1". Please note that this is not a device failure condition since the device was incorrectly used. Reading Toggle Bits Q6/ Q2 Refer to the toggle bit algorithm for the following discussion. 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. 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 high. If the toggle bit is no longer toggling, the device has successfuly 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. 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 P/N:PM0556 REV. 0.6, DEC. 09, 1998 10 INDEX MX29F022T/B Q3 Sector Erase Timer After the completion of the initial sector erase command sequence th 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. 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. 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. CHIP PROTECTION WITH 12V SYSTEM The MX29F022T/B features hardware chip protection, which will disable both program and erase operations. To activate this mode, the programming equipment must force VID on address pin A9 and control pin OE, (suggest VID = 12V) A6 = VIL and CE = VIL.(see Table 2) Programming of the protection circuitry begins on the falling edge of the WE pulse and is terminated on the rising edge. Please refer to chip 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=1, it will produce a logical "1" code at device output Q0 for the protected status. Otherwise the device will produce 00H for the unprotected status. In this mode, the addresses,except for A1, are in "don't care" state. Address locations with A1 = VIL are reserved to read manufacturer and device codes.(Read Silicon ID) It is also possible to determine if the chip 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 status. DATA PROTECTION The MX29F022T/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. CHIP UNPROTECT WITH 12V SYSTEM The MX29F022T/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. 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. 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. P/N:PM0556 REV. 0.6, DEC. 09, 1998 11 INDEX MX29F022T/B 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 chip. It is noted that all sectors are unprotected after the chip unprotect algorithm is complete. ABSOLUTE MAXIMUM RATINGS RATING Ambient Operating Temperature Storage Temperature Applied Input Voltage Applied Output Voltage VCC to Ground Potential A9 VALUE 0oC to 70oC -65oC to 125oC -0.5V to 7.0V -0.5V to 7.0V -0.5V to 7.0V -0.5V to 13.5V CHIP PROTECTION WITHOUT 12V SYSTEM The MX29F022T/B also feature a hardware chip protection method in a system without 12V power suppply. The programming equipment do not need to supply 12 volts to protect all sectors. The details are shown in chip protect algorithm and waveform. CHIP UNPROTECT WITHOUT 12V SYSTEM The MX29F022T/B also feature a hardware chip unprotection method in a system without 12V power supply. The programming equipment do not need to supply 12 volts to unprotect all sectors. The details are shown in chip unprotect algorithm and waveform. NOTICE: Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended period may affect reliability. NOTICE: Specifications contained within the following tables are subject to change. POWER-UP SEQUENCE The MX29F022T/B powers up in the Read only mode. In addition, the memory contents may only be altered after successful completion of a two-step command sequence. Vpp and Vcc power up sequence is not required. P/N:PM0556 REV. 0.6, DEC. 09, 1998 12 INDEX MX29F022T/B CAPACITANCE TA = 25oC, f = 1.0 MHz SYMBOL CIN COUT PARAMETER Input Capacitance Output Capacitance MIN. TYP MAX. 8 12 UNIT pF pF CONDITIONS VIN = 0V VOUT = 0V READ OPERATION DC CHARACTERISTICS TA = 0oC TO 70oC, VCC = 5V ± 10% SYMBOL ILI ILO ISB1 ISB2 ICC1 ICC2 VIL VIH VOL VOH PARAMETER Input Leakage Current Output Leakage Current Standby VCC current Operating VCC current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage -0.3(NOTE1) 0.8 2.0 2.4 MIN. TYP MAX. 1 10 1 100 50 70 V VCC + 0.3 0.45 UNIT mA mA mA mA mA mA V V V CONDITIONS VIN = GND to VCC VOUT = GND to VCC CE = VIH CE = VCC + 0.3V IOUT = 0mA, f=1MHz IOUT = 0mA, f=10MHz 1 IOL = 2.1mA IOH = -2mA 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. P/N:PM0556 REV. 0.6, DEC. 09, 1998 13 INDEX MX29F022T/B AC CHARACTERISTICS TA = 0oC to 70oC, VCC = 5V ± 10% 29F022T/B-70 29F022T/B-90 29F022T/B-12 SYMBOL PARAMETER MIN. MAX. MIN. MAX. MIN. MAX. UNIT CONDITIONS tACC Address to Output Delay 70 90 120 ns CE=OE=VIL tCE CE to Output Delay 70 90 120 ns OE=VIL tOE OE to Output Delay 30 40 50 ns CE=VIL tDF OE High to Output Float (Note1) 0 20 0 30 0 30 ns CE=VIL tOH Address to Output hold 0 0 0 ns CE=OE=VIL TEST CONDITIONS: NOTE: 1.tDF is defined as the time at which the output achieves the open circuit condition and data is no longer driven. • Input pulse levels: 0.45V/2.4V • Input rise and fall times: is equal to or less than 10ns • Output load: 1 TTL gate + 35pF(Including scope and jig) • Reference levels for measuring timing: 0.8V, 2.0V READ TIMING WAVEFORMS VIH A0~17 VIL ADD Valid tCE VIH CE VIL WE VIH VIL VIH VIL tACC tOH tOE tDF OE DATA Q0~7 VOH VOL HIGH Z DATA Valid HIGH Z P/N:PM0556 REV. 0.6, DEC. 09, 1998 14 INDEX MX29F022T/B COMMAND PROGRAMMING/DATA PROGRAMMING/ERASE OPERATION DC CHARACTERISTICS TA = 0oC to 70oC, VCC = 5V ± 10% SYMBOL PARAMETER MIN. ICC1 (Read) Operating VCC Current ICC2 ICC3 (Program) ICC4 (Erase) ICCES VCC Erase Suspend Current TYP MAX. 30 50 50 50 2 UNIT mA mA mA mA mA CONDITIONS IOUT=0mA, f=1MHz IOUT=0mA, F=10MHz In Programming In Erase CE=VIH, Erase Suspended NOTES: 1. VIL min. = -0.6V for pulse width is equal to or less than 20ns. 2. If VIH is over the specified maximum value, programming operation cannot be guranteed. 3. ICCES is specified with the device de-selected. If the device is read during erase suspend mode, current draw is the sum of ICCES and ICC1 or ICC2. 4. All current are in RMS unless otherwise noted. P/N:PM0556 REV. 0.6, DEC. 09, 1998 15 INDEX MX29F022T/B AC CHARACTERISTICS TA = 0oC to 70oC, VCC = 5V ± 10% 29F022T/B-70 29F022T/B-90 29F022T/B-12 SYMBOL tOES tCWC tCEP tCEPH1 tCEPH2 tAS tAH tDS tDH tCESC tDF tAETC tAETB tAVT tBAL tCH tCS tVLHT tOESP tWPP1 tWPP2 PARAMETER OE setup time Command programming cycle WE programming pulse width WE programming pluse width High WE programming pluse width High Address setup time Address hold time Data setup time Data hold time CE setup time before command write Output disable time (Note 1) Total erase time in auto chip erase Total erase time in auto block erase Total programming time in auto verify (Byte Program time) Block address load time CE Hold Time CE setup to WE going low Voltge Transition Time OE Setup Time to WE Active Write pulse width for chip protect Write pulse width for chip unprotect 80 0 0 4 4 10 12 80 0 0 4 4 10 12 80 0 0 4 4 10 12 us us us us us us ms 2(TYP.) 1(TYP.) 7 MIN. 50 70 35 20 20 0 45 30 0 0 30 2(TYP.) 1(TYP.) 7 MAX. MIN. 50 90 45 20 20 0 45 45 0 0 40 2(TYP.) 1(TYP.) 7 MAX. MIN. 50 120 50 20 20 0 50 50 0 0 40 MAX. UNIT CONDITIONS ns ns ns ns ns ns ns ns ns ns ns s s us NOTES: 1.tDF defined as the time at which the output achieves the open circuit condition and data is no longer driven. P/N:PM0556 REV. 0.6, DEC. 09, 1998 16 INDEX MX29F022T/B SWITCHING TEST CIRCUITS DEVICE UNDER TEST 1.6K ohm +5V CL 1.2K ohm DIODES=IN3064 OR EQUIVALENT CL=100pF Including jig capacitance SWITCHING TEST WAVEFORMS 2.4V 2.0V 2.0V TEST POINTS 0.8V 0.45V INPUT 0.8V OUTPUT AC TESTING: Inputs are driven at 2.4V for a logic "1" and 0.45V for a logic "0". Input pulse rise and fall times are