W49L102

Preliminary W49L102 64K × 16 CMOS 3.3V FLASH MEMORY GENERAL DESCRIPTION The W49L102 is a 1-megabit, 3.3-volt only CMOS flash memory organized as 64K × 16 bits. The device can be programmed and erased in-system with a standard 3.3V power supply. A 12-volt VPP is not required. The unique cell architecture of the W49L102 results in fast program/erase operations with extremely low current consumption (compared to other comparable 3.3-volt flash memory products). The device can also be programmed and erased using standard EPROM programmers. FEATURES • Single 3.3-volt operations: − 3.3-volt Read − 3.3-volt Erase − 3.3-volt Program • Low power consumption − Active current: 15 mA (typ.) − Standby current: 10 µA (typ.) • • • Fast Program operation: − Word-by-Word programming: 50 µS (max.) Fast Erase operation: 100 mS (typ.) Fast Read access time: 55/70/90 nS Endurance: 1K/10K cycles (typ.) Twenty-year data retention Hardware data protection 8K word Boot Block with Lockout protection • • • • Automatic program and erase timing with internal VPP generation End of program or erase detection − Toggle bit − Data polling Latched address and data TTL compatible I/O JEDEC standard word-wide pinouts Available packages: 40-pin TSOP and 44-pin PLCC • • • • • • -1- Publication Release Date: June 1999 Revision A1 Preliminary W49L102 PIN CONFIGURATIONS BLOCK DIAGRAM VDD V SS A9 A10 A11 A12 A13 A14 A15 NC WE VDD NC CE DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 40-pin TSOP 33 32 31 30 29 28 27 26 25 24 23 22 21 GND A8 A7 A6 A5 A4 A3 A2 A1 A0 OE DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 GND CE OE WE CONTROL DQ0 OUTPUT BUFFER . . DQ15 A0 . . A15 MAIN MEMORY DECODER (56K Words) BootBlock (8K Words) V DDD/ Q Q QCNN D 13 14 15 E C C D 6 5 4 3 2 / WN EC AA 11 54 1 44 43 42 41 40 39 38 37 36 DQ12 DQ11 DQ10 DQ9 DQ8 GND NC DQ7 DQ6 DQ5 DQ4 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 A13 A12 A11 A10 A9 GND NC A8 A7 A6 A5 PIN DESCRIPTION SYMBOL A0−A15 DQ0−DQ15 CE OE WE VDD GND NC PIN NAME Address Inputs Data Inputs/Outputs Chip Enable Output Enable Write Enable Power Supply Ground No Connection 44-pin PLCC 35 34 33 32 31 30 29 DDDD QQQQ 3210 /NAA OC01 E AAA 234 -2- Preliminary W49L102 FUNCTIONAL DESCRIPTION Read Mode The read operation of the W49L102 is controlled by CE and OE , both of which have to be low for the host to obtain data from the outputs. CE is used for device selection. When CE is high, the chip is de-selected and only standby power will be consumed. OE is the output control and is used to gate data from the output pins. The data bus is in high impedance state when either CE or OE is high. Refer to the timing waveforms for further details. Boot Block Operation There is one 8K-word boot block in this device, which can be used to store boot code. It is located in the first 8K words of the memory with the address range from 0000 hex to 1FFF hex. See Command Codes for Boot Block Lockout Enable for the specific code. Once this feature is set the data for the designated block can not be erased or programmed (programming lockout); other memory locations can be changed by the regular programming method. Once the boot block programming lockout feature is activated, the chip erase function will only affect the main memory. In order to detect whether the boot block feature is set on the 8K-words block, users can perform software command sequence: enter the product identification mode (see Command Codes for Identification/Boot Block Lockout Detection for specific code), and then read from address "0002 hex". If the output data is "FF hex," the boot block programming lockout feature is activated; if the output data is "FE hex," the lockout feature is inactivated and the block can be erased/programmed. To return to normal operation, perform a three-byte command sequence (or an alternate single-word command) to exit the identification mode. For the specific code, see Command Codes for Identification/Boot Block Lockout Detection. Input Levels While operating with a 3.0V−3.6V power supply, the address inputs and control inputs ( OE, CE and WE ) may be driven from 0 to 5.5V without adversely affecting the operation of the device. The I/O lines can only be driven from 0 to 3.6V. Chip Erase Operation The chip-erase mode can be initiated by a six-word command sequence. After the command loading cycle, the device enters the internal chip erase mode, which is automatically timed and will be completed in a fast 100 mS (typical). The host system is not required to provide any control or timing during this operation. If the boot block programming lockout is activated, only the data in the main memory will be erased to FF(hex), and the data in the boot block will not be erased (remains same as before the chip erase operation). The entire memory array (main memory and boot block) will be erased to FF hex. by the chip erase operation if the boot block programming lockout feature is not activated. The device will automatically return to normal read mode after the erase operation completed. Data polling and/or Toggle Bits can be used to detect end of erase cycle. Main Memory Erase Operation The main memory erase mode can be initiated by a six-word command sequence. After the command loading cycle, the device enters the internal main-memory erase mode, which is automatically timed and will be completed in a fast 100 mS (typical). The host system is not required -3- Publication Release Date: June 1999 Revision A1 Preliminary W49L102 to provide any control or timing during this operation. The device will automatically return to normal read mode after the erase operation completed. Data polling and/or Toggle Bits can be used to detect end of erase cycle. Program Operation The W49L102 is programmed on a word-by-word basis. Program operation can only change logical data "1" to logical data "0" The erase operation (changed entire data in main memory and/or boot block from "0" to "1" is needed before programming. The program operation is initiated by a 4-word command cycle (see Command Codes for Word Programming). The device will interally enter the program operation immediately after the wordprogram command is entered. The internal program timer will automatically time-out (50 µS max. TBP) once completed and return to normal read mode. Data polling and/or Toggle Bits can be used to detect end of program cycle. Hardware Data Protection The integrity of the data stored in the W49L102 is also hardware protected in the following ways: (1) Noise/Glitch Protection: A WE pulse of less than 15 nS in duration will not initiate a write cycle. (2) VDD Power Up/Down Detection: The programming operation is inhibited when VDD is less than 1.8V typical. (3) Write Inhibit Mode: Forcing OE low, CE high, or WE high will inhibit the write operation. This prevents inadvertent writes during power-up or power-down periods. (4) VDD power-on delay: When VDD has reached its sense level, the device will automatically timeout 10 mS before any write (erase/program) operation. Data Polling (DQ7 & DQ15)- Write Status Detection The W49L102 includes a data polling feature to indicate the end of a program or erase cycle. When the W49L102 is in the internal program or erase cycle, any attempt to read DQ7 or DQ15 of the last word loaded will receive the complement of the true data. Once the program or erase cycle is completed, DQ7 or DQ15 will show the true data. Note that DQ7 or DQ15 will show logical "0" during the erase cycle, and become logical "1" or true data when the erase cycle has been completed. Toggle Bit (DQ6 & DQ14)- Write Status Detection In addition to data polling, the W49L102 provides another method for determining the end of a program cycle. During the internal program or erase cycle, any consecutive attempts to read DQ6 or DQ14 will produce alternating 0's and 1's. When the program or erase cycle is completed, this toggling between 0's and 1's will stop. The device is then ready for the next operation. Product Identification The product ID operation outputs the manufacturer code and device code. Programming equipment automatically matches the device with its proper erase and programming algorithms. The manufacturer and device codes can be accessed by software or hardware operation. In the software access mode, a six-word (or JEDEC 3-word) command sequence can be used to access the product ID. A read from address 0000H outputs the manufacturer code (00DAh). A read from address 0001H outputs the device code (00BFh). The product ID operation can be terminated by a three-word command sequence or an altenate one-word command sequence (see Command Definition table). In the hardware access mode, access to the product ID is activated by forcing CE and OE low, WE high, and raising A9 to 12 volts. -4- Preliminary W49L102 TABLE OF OPERATING MODES Operating Mode Selection (VHH = 12V ± 0.5V ) MODE CE Read Write Standby Write Inhibit Output Disable Product ID VIL VIL VIH X X X VIL VIL OE VIL VIH X VIL X VIH VIL VIL WE VIH VIL X X VIH X VIH VIH AIN AIN X X X X PINS ADDRESS Dout Din High Z High Z/DOUT High Z/DOUT High Z Manufacturer Code 00DA (Hex) Device Code 00BF (Hex) DQ. A0 = VIL; A1−A15 = VIL; A9 = VHH A0 = VIH; A1−A15 = VIL; A9 = VHH TABLE OF COMMAND DEFINITION Command Description No. of Cycles 1st Cycle 2nd Cycle 3rd Cycle Addr. Data Addr. Data Addr. Data 4th Cycle Addr. Data 5th Cycle Addr. Data 6th Cycle Addr. Data Read Chip Erase Main Memory Erase Word Program Boot Block Lockout Product ID Entry Product ID Exit (1) Product ID Exit (1) 1 6 6 4 6 3 3 1 AIN DOUT 2AAA 55 2AAA 55 2AAA 55 2AAA 55 2AAA 55 2AAA 55 5555 80 5555 80 5555 A0 5555 80 5555 90 5555 F0 5555 AA 5555 AA AIN DIN 2AAA 55 5555 40 2AAA 55 2AAA 55 5555 10 5555 30 5555 AA 5555 AA 5555 AA 5555 AA 5555 AA 5555 AA XXXX F0 5555 AA Note: Address Format: A14−A0 (Hex); Data Format: DQ15−DQ8 (Don't Care); DQ7-DQ0 (Hex) Either one of the two Product ID Exit commands can be used. -5- Publication Release Date: June 1999 Revision A1 Preliminary W49L102 Command Codes for Word Program WORD SEQUENCE 0 Write 1 Write 2 Write 3 Write ADDRESS 5555H 2AAAH 5555H Programmed-Address DATA AAH 55H A0H Programmed-Data Word Program Flow Chart Word Program Command Flow Load data AA to address 5555 Load data 55 to address 2AAA Load data A0 to address 5555 Load data Din to programmedaddress Pause 50 µS Exit Notes for software program code: Data Format: DQ15−DQ0 (Hex); XX = Don't Care Address Format: A14−A0 (Hex) -6- Preliminary W49L102 Command Codes for Chip Erase BYTE SEQUENCE 1 Write 2 Write 3 Write 4 Write 5 Write 6 Write ADDRESS 5555H 2AAAH 5555H 5555H 2AAAH 5555H DATA AAH 55H 80H AAH 55H 10H Chip Erase Acquisition Flow Load data AA to address 5555 Load data 55 to address 2AAA Load data 80 to address 5555 Load data AA to address 5555 Load data 55 to address 2AAA Load data 10 to address 5555 Pause 1 Sec. Exit Notes for chip erase: Data Format: DQ15-DQ8: Don't Care; DQ7−DQ0 (Hex) Address Format: A14−A0 (Hex) -7- Publication Release Date: June 1999 Revision A1 Preliminary W49L102 Command Codes for Main Memory Erase BYTE SEQUENCE 1 Write 2 Write 3 Write 4 Write 5 Write 6 Write ADDRESS 5555H 2AAAH 5555H 5555H 2AAAH 5555H DATA AAH 55H 80H AAH 55H 30H Main Memory Erase Acquisition Flow Load data AA to address 5555 Load data 55 to address 2AAA Load data 80 to address 5555 Load data AA to address 5555 Load data 55 to address 2AAA Load data 30 to address 5555 Pause 1 Sec. Exit Notes for chip erase: Data Format: DQ15-DQ8: Don't Care; DQ7−DQ0 (Hex) Address Format: A14−A0 (Hex) -8- Preliminary W49L102 Command Codes for Product Identification and Boot Block Lockout Detection BYTE SEQUENCE ALTERNATE PRODUCT (6) IDENTIFICATION/BOOT BLOCK LOCKOUT DETECTION ENTRY ADDRESS 1 Write 2 Write 3 Write 5555 2AAA 5555 Pause 20µS DATA AA 55 90 SOFTWARE PRODUCT IDENTIFICATION/BOOT BLOCK LOCKOUT DETECTION EXIT (7) ADDRESS 5555H 2AAAH 5555H Pause 20µS DATA AAH 55H F0H Software Product Identification and Boot Block Lockout Detection Acquisition Flow Product Identification Entry (1) Load data AA to address 5555 Product Identification and Boot Block Lockout Detection Mode (3) Product Identification Exit(7) Load data AA to address 5555 (2) Load data 55 to address 2AAA Read address = 00000 data = DA Load data 55 to address 2AAA Load data 90 to address 5555 Read address = 00001 data = BF (2) Load data F0 to address 5555 Pause 10 µ S (4) Read address = 00002 data = FF/FE Pause 10 µ S (5) Normal Mode Notes for software product identification/boot block lockout detection: (1) Data Format: DQ15-DQ8 (Don't Care), DQ7−DQ0 (Hex); Address Format: A14−A0 (Hex) (2) A1−A15 = VIL; manufacture code is read for A0 = VIL; device code is read for A0 = VIH. (3) The device does not remain in identification and boot block lockout detection mode if power down. (4) If the output data is "FF Hex," the boot block programming lockout feature is activated; if the output data "FE Hex," the lockout feature is inactivated and the block can be programmed. (5) The device returns to standard operation mode. (6) Optional 1-write cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection. -9- Publication Release Date: June 1999 Revision A1 Preliminary W49L102 Command Codes for Boot Block Lockout Enable BYTE SEQUENCE 1 Write 2 Write 3 Write 4 Write 5 Write 6 Write BOOT BLOCK LOCKOUT FEATURE SET ADDRESS 5555H 2AAAH 5555H 5555H 2AAAH 5555H Pause 1 Sec. DATA AAH 55H 80H AAH 55H 40H Boot Block Lockout Enable Acquisition Flow Boot Block Lockout Feature Set Flow Load data AA to address 5555 Load data 55 to address 2AAA Load data 80 to address 5555 Load data AA to address 5555 Load data 55 to address 2AAA Load data 40 to address 5555 Pause 1 Sec. Exit Notes for boot block lockout enable: Data Format: DQ15-DQ8 Don't Care), DQ7−DQ0 (Hex) Address Format: A14−A0 (Hex) - 10 - Preliminary W49L102 DC CHARACTERISTICS Absolute Maximum Ratings PARAMETER Power Supply Voltage to Vss Potential Operating Temperature Storage Temperature D.C. Voltage on Any Pin to Ground Potential except A9 Transient Voltage (