W39L020P-90B

W39L020 256K × 8 CMOS FLASH MEMORY 1. GENERAL DESCRIPTION The W39L020 is a 2Mbit, 3.3-volt only CMOS flash memory organized as 256K × 8 bits. For flexible erase capability, the 2Mbits of data are divided into 4 uniform sectors of 64 Kbytes, which are composed of 16 smaller even pages with 4 Kbytes. The byte-wide (× 8) data appears on DQ7 − DQ0. 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 W39L020 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 by using standard EPROM programmers. 2. FEATURES • Single 3.3-volt operations − 3.3-volt Read − 3.3-volt Erase − 3.3-volt Program • Hardware protection: − Optional 16K byte or 64K byte Top/Bottom Boot Block with lockout protection • • Fast Program operation: − Byte-by-Byte programming: 50 µS (max.) Fast Erase operation: − Chip Erase cycle time: 100 mS (max.) − Sector Erase cycle time: 25mS (max.) − Page Erase cycle time: 25mS (max.) Flexible 4K-page size can be used as Parameter Blocks • Typical program/erase cycles: 1K/10K • Twenty-year data retention • Low power consumption • − Active current: 10 mA (typ.) − Standby current: 5 µA (typ.) • End of program detection • Read access time: 70/90 nS • • 4 Even sectors with 64K bytes each, which is composed of 16 flexible pages with 4K bytes Any individual sector or page can be erased − Software method: Toggle bit/Data polling • TTL compatible I/O • JEDEC standard byte-wide pinouts • Available packages: 32L PLCC, 32L TSOP (8 x 20 mm) and 32L STSOP (8 x 14 mm) -1- Publication Release Date: November 11, 2002 Revision A4 W39L020 3. PIN CONFIGURATIONS 4. BLOCK DIAGRAM VDD VSS A 1 2 4 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 D Q 1 D Q 2 A 1 5 3 A 1 6 2 N C V D D # W E A 1 7 #CE #OE #WE 29 28 27 26 A14 A13 A8 A9 A11 #OE A10 #CE DQ7 CONTROL OUTPUT BUFFER DQ0 . . 1 32 31 30 DQ7 32L PLCC 25 24 23 22 21 A0 . . A17 DECODER CORE ARRAY VD SQ S3 D Q 4 D Q 5 D Q 6 A11 A9 A8 A13 A14 A17 #WE VDD NC 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 32L TSOP & STSOP #OE A10 #CE DQ7 DQ6 DQ5 DQ4 DQ3 V SS DQ2 DQ1 DQ0 A0 A1 A2 A3 5. PIN DESCRIPTION SYMBOL A0 − A17 DQ0 − DQ7 #CE #OE #WE VDD VSS PIN NAME Address Inputs Data Inputs/Outputs Chip Enable Output Enable Write Enable Power Supply Ground -2- W39L020 6. FUNCTIONAL DESCRIPTION Device Bus Operation Read Mode The read operation of the W39L020 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. Write Mode Device erasure and programming are accomplished via the command register. The contents of the register serve as inputs to the internal state machine. The state machine outputs dictate the function of the device. The command register itself does not occupy any addressable memory location. The register is a latch used to store the commands, along with the address and data information needed to execute the command. The command register is written to bring #WE to logic low state, while #CE is at logic low state and #OE is at logic high state. Addresses are latched on the falling edge of #WE or #CE, whichever happens later; while data is latched on the rising edge of #WE or #CE, whichever happens first. Standard microprocessor write timings are used. Refer to AC Write Characteristics and the Erase/Programming Waveforms for specific timing parameters. Standby Mode There are two ways to implement the standby mode on the W39L020 device, both using the #CE pin. A CMOS standby mode is achieved with the #CE input held at VDD ±0.5V. Under this condition the current is typically reduced to less than 25 µA(max). A TTL standby mode is achieved with the #CE pin held at VIH. Under this condition the current is typically reduced to 2 mA(max). In the standby mode the outputs are in the high impedance state, independent of the #OE input. Output Disable Mode With the #OE input at a logic high level (VIH), output from the device is disabled. This will cause the output pins to be in a high impedance state. Auto-select Mode The auto-select mode allows the reading of a binary code from the device and will identify its manufacturer and type. This mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. This mode is functional over the entire temperature range of the device. To activate this mode, the programming equipment must force VID (11.5V to 12.5V) on address pin A9. Two identifier bytes may then be sequenced from the device outputs by toggling address A0 from VIL to VIH. All addresses are don′t cares except A0 and A1 (see "Auto-select Codes"). -3- Publication Release Date: November 11, 2002 Revision A4 W39L020 The manufacturer and device codes may also be read via the command register, for instance, when the W39L020 is erased or programmed in a system without access to high voltage on the A9 pin. The command sequence is illustrated in "Auto-select Codes". Byte 0 (A0 = VIL) represents the manufacturer′s code (Winbond = DAH) and byte 1 (A0 = VIH) the device identifier code (W39L020 = B5hex). All identifiers for manufacturer and device will exhibit odd parity with DQ7 defined as the parity bit. In order to read the proper device codes when executing the Auto-select, A1 must be low state. Data Protection The W39L020 is designed to offer protection against accidental erasure or programming caused by spurious system level signals that may exist during power transitions. During power up the device automatically resets the internal state machine in the Read mode. Also, with its control register architecture, alteration of the memory contents only occurs after successful completion of specific multi-bus cycle command sequences. The device also incorporates several features to prevent inadvertent write cycles resulting from VDD power-up and power-down transitions or system noise. Boot Block Operation There are four alternatives to set the boot block. Either 16K-byte or 64K-byte in the top/bottom location of this device can be locked as boot block, which can be used to store boot codes. It is located in the last 16K/64K bytes or first 16K/64K bytes of the memory with the address range from 3C000/30000(hex) to 3FFFF(hex) for top location or 00000(hex) to 03FFF/0FFFF(hex) for bottom location. See Command Codes for Boot Block Lockout Enable for the specific code. Once this feature is set the data for the designated block cannot be erased or programmed (programming lockout), other memory locations can be changed by the regular programming method. In order to detect whether the boot block feature is set on the first/last 16K/64K-bytes block or not, 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) for first(bottom) location or 3FFF2(hex) for last(top) location. If the DQ0/DQ1 of output data is "1," the 64Kbytes/16Kbytes boot block programming lockout feature will be activated; if the DQ0/DQ1 of output data is "0," the lockout feature will be inactivated and the block can be erased/programmed. To return to normal operation, perform a three-byte command sequence (or an alternate single-byte command) to exit the identification mode. For the specific code, see Command Codes for Identification/Boot Block Lockout Detection. Low VDD Inhibit To avoid initiation of a write cycle during VDD power-up and power-down, the W39L020 locks out when VDD < 2.0V (see DC Characteristics section for voltages). The write and read operations are inhibited when VDD is less than 2.0V typical. The W39L020 ignores all write and read operations until VDD > 2,0V. The user must ensure that the control pins are in the correct logic state when VDD > 2.0V to prevent unintentional writes. Write Pulse "Glitch" Protection Noise pulses of less than 10 nS (typical) on #OE, #CE, or #WE will not initiate a write cycle. -4- W39L020 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. Power-up Write and Read Inhibit Power-up of the device with #WE = #CE = VIL and #OE = VIH will not accept commands on the rising edge of #WE except 5mS delay (see the power up timing in AC Characteristics). The internal state machine is automatically reset to the read mode on power-up. Command Definitions 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. "Command Definitions" defines the valid register command sequences. Read Command The device will automatically power-up in the read state. In this case, a command sequence is not required to read data. Standard microprocessor read cycles will retrieve array data. This default value ensures that no spurious alteration of the memory content occurs during the power transition. The device will automatically returns to read state after completing an Embedded Program or Embedded Erase algorithm. Refer to the AC Read Characteristics and Waveforms for the specific timing parameters. Auto-select Command Flash memories are intended for use in applications where the local CPU can alter memory contents. As such, manufacture and device codes must be accessible while the device resides in the target system. PROM programmers typically access the signature codes by raising A9 to a high voltage. However, multiplexing high voltage onto the address lines is not generally a desirable system design practice. The device contains an auto-select command operation to supplement traditional PROM programming methodology. The operation is initiated by writing the auto-select command sequence into the command register. Following the command write, a read cycle from address XX00H retrieves the manufacture code of DAH. A read cycle from address XX01H returns the device code (W39L020 = B5hex). To terminate the operation, it is necessary to write the auto-select exit command sequence into the register. Byte Program Command The device is programmed on a byte-by-byte basis. Programming is a four-bus-cycle operation. The program command sequence 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. Addresses are latched on the falling edge of #CE or #WE, whichever happens later and the data is latched on the rising edge of #CE or #WE, whichever happens first. The rising edge of #CE or #WE (whichever happens first) begins programming using the Embedded Program Publication Release Date: November 11, 2002 Revision A4 -5- W39L020 Algorithm. Upon executing the algorithm, the system is not required to provide further controls or timings. The device will automatically provide adequate internally generated program pulses and verify the programmed cell margin. The automatic programming operation is completed when the data on DQ7 (also used as Data Polling) is equivalent to the data written to this bit at which time the device returns to the read mode and addresses are no longer latched (see "Hardware Sequence Flags"). Therefore, the device requires that a valid address to the device be supplied by the system at this particular instance of time for Data Polling operations. Data Polling must be performed at the memory location which is being programmed. Any commands written to the chip during the Embedded Program Algorithm will be ignored. If a hardware reset occurs during the programming operation, the data at that particular location will be corrupted. Programming is allowed in any sequence and across sector boundaries. Beware that a data "0" cannot be programmed back to a "1". Attempting to program 0 back to 1, the toggle bit will stop toggling. Only erase operations can convert "0"s to "1"s. Refer to the Programming Command Flow Chart using typical command strings and bus operations. Chip Erase Command Chip erase is a six-bus-cycle operation. There are two "unlock" write cycles, followed by writing the "set-up" command. Two more "unlock" write cycles are asserted, followed by the chip erase command. Chip erase does not require the user to program the device prior to erase. Upon executing the Embedded Erase Algorithm command sequence the device will automatically erase and verify the entire memory for an all one data pattern. The erase is performed sequentially on each sectors at the same time (see "Feature"). The system is not required to provide any controls or timings during these operations. The automatic erase begins on the rising edge of the last #WE pulse in the command sequence and terminates when the data on DQ7 is "1" at which time the device returns to read the mode. Refer to the Erase Command Flow Chart using typical command strings and bus operations. Sector/Page Erase Command Sector/page erase is a six bus cycles operation. There are two "unlock" write cycles, followed by writing the "set-up" command. Two more "unlock" write cycles then follows by the sector erase command. The sector/page address (any address location within the desired sector/page) is latched on the falling edge of #WE, while the command (30H/50H) is latched on the rising edge of #WE. Sector/page erase does not require the user to program the device prior to erase. When erasing a sector/page or sectors/pages the remaining unselected sectors/pages are not affected. The system is not required to provide any controls or timings during these operations. The automatic sector/page erase begins after the erase command is completed, right from the rising edge of the #WE pulse for the last sector/page erase command pulse and terminates when the data on DQ7, Data Polling, is "1" at which time the device returns to the read mode. Data Polling must be performed at an address within any of the sectors/pages being erased. Refer to the Erase Command flow Chart using typical command strings and bus operations. -6- W39L020 Write Operation Status DQ7: Data Polling The W39L020 device features Data Polling as a method to indicate to the host that the embedded algorithms are in progress or completed. During the Embedded Program Algorithm, an attempt to read the device will produce the complement of the data last written to DQ7. Upon completion of the Embedded Program Algorithm, an attempt to read the device will produce the true data last written to DQ7. During the Embedded Erase Algorithm, an attempt to read the device will produce a "0" at the DQ7 output. Upon completion of the Embedded Erase Algorithm, an attempt to read the device will produce a "1" at the DQ7 output. For chip erase, the Data Polling is valid after the rising edge of the sixth pulse in the six #WE write pulse sequences. For sector erase, the Data Polling is valid after the last rising edge of the sector erase #WE pulse. Data Polling must be performed at sector addresses within any of the sectors being erased. Otherwise, the status may not be valid. Just prior to the completion of Embedded Algorithm operations DQ7 may change asynchronously while the output enable (#OE) is asserted low. This means that the device is driving status information on DQ7 at one instant of time and then that byte′s valid data at the next instant of time. Depending on when the system samples the DQ7 output, it may read the status or valid data. Even if the device has completed the Embedded Algorithm operations and DQ7 has a valid data, the data outputs on DQ0– DQ6 may be still invalid. The valid data on DQ0 − DQ7 will be read on the successive read attempts. The Data Polling feature is only active during the Embedded Programming Algorithm, Embedded Erase Algorithm, or sector erase time-out (see "Command Definitions"). DQ6: Toggle Bit The W39L020 also features the "Toggle Bit" as a method to indicate to the host system that the embedded algorithms are in progress or completed. During an Embedded Program or Erase Algorithm cycle, successive attempts to read (#OE toggling) data from the device at any address will result in DQ6 toggling between one and zero. Once the Embedded Program or Erase Algorithm cycle is completed, DQ6 will stop toggling and valid data will be read on the next successive attempt. During programming, the Toggle Bit is valid after the rising edge of the fourth #WE pulse in the four write pulse sequence. For chip erase, the Toggle Bit is valid after the rising edge of the sixth #WE pulse in the six write pulse sequence. For sector/page erase, the Toggle Bit is valid after the last rising edge of the sector/page erase #WE pulse. The Toggle Bit is active during the sector/page erase time-out. Either #CE or #OE toggling will cause DQ6 to toggle. -7- Publication Release Date: November 11, 2002 Revision A4 W39L020 7. TABLE OF OPERATING MODES Device Bus Operations (VID = 12 ± 0.5V) MODE Read Write Standby Write Inhibit PIN #CE VIL VIL VIH X X #OE #WE VIL VIH X VIL X A0 A0 A0 X X X X VIL VIH A1 A1 A1 X X X X VIL VIL A9 A9 A9 X X X X VID VID DQ0 − DQ7 Dout Din High Z High Z/Dout High Z/Dout VIH VIL X X VIH Output Disable Auto select Manufacturers ID Auto select Device ID VIL VIL VIL VIH VIL VIL VIH VIH VIH High Z Code Code Auto-select Codes (High Voltage Method) (VID = 12 ± 0.5V) DESCRIPTION Manufacturer ID: Winbond Device ID: W39L020 #CE VIL VIL #OE VIL VIL #WE VIH VIH A9 VID VID THE OTHER ADDRESS All Add = VIL A1 = VIH, All other = VIL DQ[7:0] DAhex B5hex Sector Address Table SECTOR A17 0 0 1 1 A16 0 1 0 1 SECTOR SIZE (KBYTES) 64 64 64 64 ADDRESS 00000h − 0FFFFh 10000h − 1FFFFh 20000h − 2FFFFh 30000h − 3FFFFh SA0 SA1 SA2 SA3 Note: All sectors are 64K bytes in size. -8- W39L020 Command Definitions COMMAND DESCRIPTION Read Chip Erase Sector Erase Page Erase Byte Program Top Boot Block Lockout – 64K/16KByte Bottom Boot Block Lockout 64K/16KByte Product ID Entry Product ID Exit Product ID Exit (2) (2) NO. OF Cycles 1ST CYCLE Addr. AIN 5555 5555 5555 5555 5555 (1) 2ND CYCLE 3RD CYCLE 4TH CYCLE 5TH CYCLE 6TH CYCLE Addr. Data Addr. Data Addr. Data Addr. Data Addr. Data 7TH CYCLE Addr. Data Data 1 6 6 6 4 6 DOUT AA AA AA AA AA 2AAA 55 2AAA 55 2AAA 55 2AAA 55 2AAA 55 5555 5555 5555 5555 5555 80 80 80 A0 80 5555 AA 5555 AA 5555 AA AIN DIN 2AAA 55 5555 40/70 3FFFF XX(5) 2AAA 55 2AAA 55 2AAA 55 5555 SA(3) PA(4) 10 30 50 5555 AA 6 3 3 1 5555 5555 5555 XXXX AA AA AA F0 2AAA 55 2AAA 55 2AAA 55 5555 5555 5555 80 90 F0 5555 AA 2AAA 55 5555 40/70 00000 XX(5) Notes: 1. Address Format: A14 − A0 (Hex); Data Format: DQ7 − DQ0 (Hex) 2. Either one of the two Product ID Exit commands can be used. 3. SA: Sector Address SA = 3XXXXh for Unique Sector3 SA = 2XXXXh for Unique Sector2 SA = 1XXXXh for Unique Sector1 SA = 0XXXXh for Unique Sector0 4. PA: Page Address PA = 3FXXXh for Page 15 in Sector3 PA = 3EXXXh for Page 14 in Sector3 PA = 2FXXXh for Page 15 in Sector2 PA = 2EXXXh for Page 14 in Sector2 PA = 1FXXXh for Page 15 in Sector1 PA = 1EXXXh for Page 14 in Sector1 PA = 0FXXXh for Page 15 in Sector0 PA = 0EXXXh for Page 14 in Sector0 PA = 0DXXXh for Page 13 in Sector0 PA = 0CXXXh for Page 12 in Sector0 PA = 0BXXXh for Page 11 in Sector0 PA = 0AXXXh for Page 10 in Sector0 SA = 09XXXh for Page 9 in Sector0 SA = 08XXXh for Page 8 in Sector0 SA = 07XXXh for Page 7 in Sector0 SA = 06XXXh for Page 6 in Sector0 SA = 05XXXh for Page 5 in Sector0 SA = 04XXXh for Page 4 in Sector0 SA = 03XXXh for Page 3 in Sector0 SA = 02XXXh for Page 2 in Sector0 SA = 01XXXh for Page 1 in Sector0 SA = 00XXXh for Page 0 in Sector0 PA = 3DXXXh for Page 13 in Sector3 PA = 2DXXXh for Page 13 in Sector2 PA = 1DXXXh for Page 13 in Sector1 PA = 3CXXXh for Page 12 in Sector3 PA = 2CXXXh for Page 12 in Sector2 PA = 1CXXXh for Page 12 in Sector1 PA = 3BXXXh for Page 11 in Sector3 PA = 3AXXXh for Page 10 in Sector3 PA = 39XXXh for Page 9 in Sector3 PA = 38XXXh for Page 8 in Sector3 PA = 37XXXh for Page 7 in Sector3 PA = 36XXXh for Page 6 in Sector3 PA = 35XXXh for Page 5 in Sector3 PA = 34XXXh for Page 4 in Sector3 PA = 33XXXh for Page 3 in Sector3 PA = 32XXXh for Page 2 in Sector3 PA = 31XXXh for Page 1 in Sector3 PA = 30XXXh for Page 0 in Sector3 PA = 2BXXXh for Page 11 in Sector2 PA = 2AXXXh for Page 10 in Sector2 SA = 29XXXh for Page 9 in Sector2 SA = 28XXXh for Page 8 in Sector2 SA = 27XXXh for Page 7 in Sector2 SA = 26XXXh for Page 6 in Sector2 SA = 25XXXh for Page 5 in Sector2 SA = 24XXXh for Page 4 in Sector2 SA = 23XXXh for Page 3 in Sector2 SA = 22XXXh for Page 2 in Sector2 SA = 21XXXh for Page 1 in Sector2 SA = 20XXXh for Page 0 in Sector2 PA = 1BXXXh for Page 11 in Sector1 PA = 1AXXXh for Page 10 in Sector1 SA = 19XXXh for Page 9 in Sector1 SA = 18XXXh for Page 8 in Sector1 SA = 17XXXh for Page 7 in Sector1 SA = 16XXXh for Page 6 in Sector1 SA = 15XXXh for Page 5 in Sector1 SA = 14XXXh for Page 4 in Sector1 SA = 13XXXh for Page 3 in Sector1 SA = 12XXXh for Page 2 in Sector1 SA = 11XXXh for Page 1 in Sector1 SA = 10XXXh for Page 0 in Sector1 5. XX: Don't care -9- Publication Release Date: November 11, 2002 Revision A4 W39L020 Embedded Programming Algorithm Start Write Program Command Sequence (see below) #Data Polling/ Toggle bit Pause T BP No Increment Address Last Address ? Yes Programming Completed Program Command Sequence (Address/Command): 5555H/AAH 2AAAH/55H 5555H/A0H Program Address/Program Data - 10 - W39L020 Embedded Erase Algorithm Start Write Erase Command Sequence (see below) #Data Polling or Toggle BitSuccessfully Completed Pause T EC /TSEC/TPEC Erasure Completed Chip Erase Command Sequence (Address/Command): 5555H/AAH Individual Sector Erase Command Sequence (Address/Command): 5555H/AAH Individual Page Erase Command Sequence (Address/Command): 5555H/AAH 2AAAH/55H 2AAAH/55H 2AAAH/55H 5555H/80H 5555H/80H 5555H/80H 5555H/AAH 5555H/AAH 5555H/AAH 2AAAH/55H 2AAAH/55H 2AAAH/55H 5555H/10H Sector Address/30H Page Address/50H - 11 - Publication Release Date: November 11, 2002 Revision A4 W39L020 Embedded #Data Polling Algorithm Start VA = Byte address for programming = Any of the sector addresses within the sector being erased during sector erase operation = Any of the page addresses within the page being erased during page erase operation = Any of the device addresses being erased during chip erase operation Read Byte (DQ0 - DQ7) Address = VA No DQ7 = Data ? Yes Pass Embedded Toggle Bit Algorithm Start Read Byte (DQ0 - DQ7) Address = Don't Care Yes DQ6 = Toggle ? No Pass - 12 - W39L020 Boot Block Lockout Enable Flow Chart 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 40/70 to address 5555 Load data XX to address 3FFFF/0 40 to lock 64K Boot Block 70 to lcok 16K Boot Block Pause 2mS Exit 3FFFF(XX) to lock Top Boot Block 000000(XX) to lock Bottom Boot Block - 13 - Publication Release Date: November 11, 2002 Revision A4 W39L020 Software Product Identification and Boot Block Lockout Detection Flow Chart Product Identification Entry (1) Load data AA to address 5555 Product Identification and Boot Block Lockout Modeti D t (3) Product Identification Exit(6) Load data AA to address 5555 (2) Load data 55 to address 2AAA Read address = 0000 data = DA Load data 55 to address 2AAA Load data 90 to address 5555 Read address = 0001 data = B5 (2) Load data F0 to address 5555 Pause 10 µS Read address=02/3FFF2 for Bottom/Top data:in DQ0="1" or "0" for 64K Boot Block or DQ1="1" or "0" for 16K Boot Block (4) Pause 10 µS (5) Normal Mode Notes for software product identification/boot block lockout detection: (1) Data Format: DQ7 − DQ0 (Hex); Address Format: A14 − A0 (Hex) (2) A1 − A17 = 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 in DQ0 or DQ1= " 1 " the boot block programming lockout feature is activated; if the output data in DQ0 or DQ1= " 0," the lockout feature is inactivated and the matched boot block can be programmed. (5) The device returns to standard operation mode. (6) Optional 1-byte cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection. - 14 - W39L020 8. DC CHARACTERISTICS Absolute maximum Ratings PARAMETER Power Supply Voltage to VSS Potential Operating Temperature Storage Temperature Voltage on Any Pin to Ground Potential Except A9 Voltage on A9 Pin to Ground Potential RATING -2.0 to +4.6 0 to +70 -65 to +125 -2.0 to +4.6 -2.0 to +13.0 UNIT V °C °C V V Note: Exposure to conditions beyond those listed under Absolute maximum Ratings may adversely affect the life and reliability of the device. DC Operating Characteristics (VDD = 3.3V ±0.3V, VSS = 0V, TA = 0 to 70° C) PARAMETER Power Supply Current Standby VDD Current (TTL input) Standby VDD Current (CMOS input) Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage SYM. TEST CONDITIONS #CE = #OE = VIL, #WE = VIH, all DQs open Address inputs = VIL/VIH, at f = 5 MHz #CE = VIH, all DQs open Other inputs = VIL/VIH #CE = VDD -0.3V, all DQs open Other inputs = VDD -0.3V/ VSS VIN = VSS to VDD VOUT = VSS to VDD IOL = 2.1 mA IOH = -0.4 mA LIMITS MIN. TYP. 10 MAX. 20 UNIT mA IDD ISB1 -0.3 2.0 2.4 1 5 - 2 25 1 1 0.8 VDD +0.5 0.45 - mA µA µA µA V V V V ISB2 ILI ILO VIL VIH VOL VOH Pin Capacitance (VDD = 3.3V, TA = 25° C, f = 1 MHz) PARAMETER Input Capacitance Output Capacitance SYMBOL CIN COUT CONDITIONS VIN = 0V VOUT = 0V TYP. 6 10 MAX. 8 12 UNIT pF pF - 15 - Publication Release Date: November 11, 2002 Revision A4 W39L020 9. AC CHARACTERISTICS AC Test Conditions PARAMETER Input Pulse Levels Input Rise/Fall Time Input/Output Timing Level Output Load 0V to 3V