AM29LV081B120EK

Am29LV081B Data Sheet The Am29LV081B is not offered for new designs. Please contact a Spansion representative for alternates. The following document contains information on Spansion memory products. Although the document is marked with the name of the company that originally developed the specification, Spansion will continue to offer these products to existing customers. Continuity of Specifications There is no change to this data sheet as a result of offering the device as a Spansion product. Any changes that have been made are the result of normal data sheet improvement and are noted in the document revision summary, where supported. Future routine revisions will occur when appro and changes will be noted in a revision summary. Continuity of Ordering Part Numbers Spansion continues to support existing part numbers beginning with “Am” and “MBM”. To order these products, please use only the Ordering Part Numbers listed in this document. For More Information Please contact your local sales office for additional information about Spansion memory solutions. Publication Number 21525 Revision D Amendment 6 Issue Date October 12, 2006 THIS PAGE LEFT INTENTIONALLY BLANK. DATA SHEET Am29LV081B 8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory The Am29LV081B is not offered for new designs. Please contact a Spansion representative for alternates. DISTINCTIVE CHARACTERISTICS ■ Single power supply operation — 2.7 to 3.6 volt read and write operations for battery-powered applications ■ Manufactured on 0.32 µm process technology — Compatible with 0.5 µm Am29LV081 device ■ High performance — Access times as fast as 70 ns ■ Ultra low power consumption (typical values at 5 MHz) — 200 nA Automatic Sleep mode current — 200 nA standby mode current — 7 mA read current — 15 mA program/erase current ■ Flexible sector architecture — Sixteen 64 Kbyte sectors — Supports full chip erase — Sector Protection features: A hardware method of locking a sector to prevent any program or erase operations within that sector Sectors can be locked in-system or via programming equipment Temporary Sector Unprotect feature allows code changes in previously locked sectors ■ Unlock Bypass Program Command — Reduces overall programming time when issuing multiple program command sequences ■ Embedded Algorithms — Embedded Erase algorithm automatically preprograms and erases the entire chip or any combination of designated sectors — Embedded Program algorithm automatically writes and verifies data at specified addresses ■ Minimum 1,000,000 write cycle guarantee per sector ■ 20-year data retention at 125°C — Reliable operation for the life of the system ■ Package option — 40-pin TSOP ■ Compatibility with JEDEC standards — Pinout and software compatible with singlepower supply Flash — Superior inadvertent write protection ■ Data# Polling and toggle bits — Provides a software method of detecting program or erase operation completion ■ Ready/Busy# pin (RY/BY#) — Provides a hardware method of detecting program or erase cycle completion ■ 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 ■ Hardware reset pin (RESET#) — Hardware method to reset the device to reading array data ■ Command sequence optimized for mass storage — Specific addresses not required for unlock cycles This Data Sheet states AMD’s current technical specifications regarding the Product described herein. This Data Sheet may be revised by subsequent versions or modifications due to changes in technical specifications. Publication# 21525 Rev: D Amendment: 6 Issue Date: October 12, 2006 DATA SHEET GENERAL DESCRIPTION The Am29LV081B is an 8 Mbit, 3.0 volt-only Flash memory organized as 1,048,576 bytes. The device is offered in a 40-pin TSOP package. The byte-wide (x8) data appears on DQ7–DQ0. This device requires only a single, 3.0 volt VCC supply to perform read, program, and erase operations. A standard EPROM programmer can also be used to program and erase the device. T his device is manufactured using AMD’s 0.32 µm process technology, and offers all the features and benefits of the Am29LV081, which was manufactured using 0 . 5 µ m p r o c e s s t e c h n o l o gy. I n a d d i t i o n , t h e Am29LV081B features unlock bypass programming and in-system sector protection/unprotection. The standard device offers access times of 70, 90, and 120 ns, allowing high speed microprocessors to operate without wait states. To eliminate bus contention the device has separate chip enable (CE#), write enable (WE#) and output enable (OE#) controls. The device requires only a single 3.0 volt power supply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations. The device is entirely command set compatible with the JEDEC single-power-supply Flash standard. Commands are written to the command register using standard microprocessor write timings. Register contents serve as input to an internal state-machine that controls the erase and programming circuitry. Write cycles also internally latch addresses and data needed for the programming and erase operations. Reading data out of the device is similar to reading from other Flash or EPROM devices. Device programming occurs by executing the program command sequence. This initiates the E mbedded Program algorithm—an internal algorithm that automatically times the program pulse widths and verifies proper cell margin. The Unlock Bypass mode facilitates faster programming times by requiring only two write cycles to program data instead of four. Device erasure occurs by executing the erase command sequence. This initiates the Embedded Erase algorithm—an internal algorithm that automatically preprograms the array (if it is not already programmed) before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper cell margin. T he host system can detect whether a program or erase operation is complete by observing the RY/BY# pin, or by reading the DQ7 (Data# Polling) and DQ6 (toggle) status bits. After a program or erase cycle has been completed, the device is ready to read array data or accept another command. The sector erase architecture allows memory sectors to be erased and reprogrammed without affecting the data contents of other sectors. The device is fully erased when shipped from the factory. Hardware data protection measures include a low VCC detector that automatically inhibits write operations during power transitions. The hardware sector protection feature disables both program and erase operations in any combination of the sectors of memory. This can be achieved in-system or via programming equipment. The Erase Suspend feature enables the user to put erase on hold for any period of time to read data from, or program data to, any sector that is not selected for erasure. True background erase can thus be achieved. The hardware RESET# pin terminates any operation in progress and resets the internal state machine to reading array data. The RESET# pin may be tied to the system reset circuitry. A system reset would thus also reset the device, enabling the system microprocessor to read the boot-up firmware from the Flash memory. The device offers two power-saving features. When addresses have been stable for a specified amount of time, the device enters the automatic sleep mode. The system can also place the device into the standby mode. Power consumption is greatly reduced in both these modes. AMD’s Flash technology combines years of Flash memory manufacturing experience to produce the highest levels of quality, reliability and cost effectiveness. The device electrically erases all bits within a sector simultaneously via Fowler-Nordheim tunneling. The data is programmed using hot electron injection. 2 Am29LV081B 21525D6 October 12, 2006 DATA SHEET TABLE OF CONTENTS Product Selector Guide . . . . . . . . . . . . . . . . . . . . . 4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . 5 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Logic Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . 6 Standard Products .................................................................... 6 Device Bus Operations . . . . . . . . . . . . . . . . . . . . . . 7 Table 1. Am29LV081B Device Bus Operations ................................7 RY/BY#: Ready/Busy# ............................................................ 18 DQ6: Toggle Bit I .................................................................... 18 DQ2: Toggle Bit II ................................................................... 18 Reading Toggle Bits DQ6/DQ2 ............................................... 18 Figure 6. Toggle Bit Algorithm......................................................... 19 DQ5: Exceeded Timing Limits ................................................ 19 DQ3: Sector Erase Timer ....................................................... 19 Table 5. Write Operation Status ..................................................... 20 Absolute Maximum Ratings . . . . . . . . . . . . . . . . 21 Figure 7. Maximum Negative Overshoot Waveform ....................... 21 Figure 8. Maximum Positive Overshoot Waveform......................... 21 Requirements for Reading Array Data ..................................... 7 Writing Commands/Command Sequences .............................. 7 Program and Erase Operation Status ...................................... 8 Standby Mode .......................................................................... 8 Automatic Sleep Mode ............................................................. 8 RESET#: Hardware Reset Pin ................................................. 8 Output Disable Mode ................................................................ 8 Table 2. Am29LV081B Sector Address Table ..................................9 Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . 21 DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 9. ICC1 Current vs. Time (Showing Active and Automatic Sleep Currents) ....................................................... 23 Figure 10. Typical ICC1 vs. Frequency ............................................ 23 Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 11. Test Setup...................................................................... 24 Table 6. Test Specifications ........................................................... 24 Figure 12. Input Waveforms and Measurement Levels .................. 24 Autoselect Mode ....................................................................... 9 Table 3. Am29LV081B Autoselect Codes (High Voltage Method) ....9 Sector Protection/Unprotection ............................................... 10 Temporary Sector Unprotect .................................................. 10 Hardware Data Protection ...................................................... 10 Figure 1. Temporary Sector Unprotect Operation........................... 10 Figure 2. In-System Sector Protect/Unprotect Algorithms .............. 11 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 25 Read Operations .................................................................... 25 Figure 13. Read Operations Timings .............................................. 25 Hardware Reset (RESET#) .................................................... 26 Figure 14. RESET# Timings ........................................................... 26 Command Definitions . . . . . . . . . . . . . . . . . . . . . . 12 Reading Array Data ................................................................ 12 Reset Command ..................................................................... 12 Autoselect Command Sequence ............................................ 12 Byte Program Command Sequence ....................................... 12 Chip Erase Command Sequence ........................................... 13 Figure 3. Program Operation .......................................................... 13 Erase/Program Operations ..................................................... 27 Figure 15. Program Operation Timings........................................... 28 Figure 16. Chip/Sector Erase Operation Timings ........................... 29 Figure 17. Data# Polling Timings (During Embedded Algorithms).. 30 Figure 18. Toggle Bit Timings (During Embedded Algorithms)....... 30 Figure 19. DQ2 vs. DQ6.................................................................. 31 Figure 20. Temporary Sector Unprotect Timing Diagram ............... 31 Figure 21. Sector Protect/Unprotect Timing Diagram ..................... 32 Figure 22. Alternate CE# Controlled Write Operation Timings ....... 34 Sector Erase Command Sequence ........................................ 13 Erase Suspend/Erase Resume Commands ........................... 14 Figure 4. Erase Operation............................................................... 15 Command Definitions ............................................................. 16 Table 4. Am29LV081B Command Definitions .................................16 Write Operation Status . . . . . . . . . . . . . . . . . . . . . 17 DQ7: Data# Polling ................................................................. 17 Figure 5. Data# Polling Algorithm ................................................... 17 Erase and Programming Performance . . . . . . . Latchup Characteristics . . . . . . . . . . . . . . . . . . . . TSOP Pin Capacitance . . . . . . . . . . . . . . . . . . . . . Data Retention. . . . . . . . . . . . . . . . . . . . . . . . . . . . Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 35 35 35 35 36 21525D6 October 12, 2006 Am29LV081B 3 DATA SHEET PRODUCT SELECTOR GUIDE Family Part Number Speed Options (VCC = 2.7–3.6 V) Max access time, ns (tACC) Max CE# access time, ns (tCE) Max OE# access time, ns (tOE) Note: See “AC Characteristics” for full specifications. -70 70 70 30 Am29LV081B -90 90 90 35 -120 120 120 50 BLOCK DIAGRAM RY/BY# VCC VSS RESET# Erase Voltage Generator Input/Output Buffers Sector Switches DQ0–DQ7 WE# State Control Command Register PGM Voltage Generator Chip Enable Output Enable STB Data Latch CE# OE# STB VCC Detector Timer Address Latch Y-Decoder Y-Gating X-Decoder Cell Matrix A0–A19 4 Am29LV081B 21525D6 October 12, 2006 DATA SHEET CONNECTION DIAGRAMS A16 A15 A14 A13 A12 A11 A9 A8 WE# RESET# NC RY/BY# A18 A7 A6 A5 A4 A3 A2 A1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Standard TSOP 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 A17 VSS NC A19 A10 DQ7 DQ6 DQ5 DQ4 VCC VCC NC DQ3 DQ2 DQ1 DQ0 OE# VSS CE# A0 PIN CONFIGURATION A0–A19 = 20 addresses DQ0–DQ7 = 8 data inputs/outputs CE# OE# WE# RESET# RY/BY# VCC = Chip enable = Output enable = Write enable = Hardware reset pin, active low = Ready/Busy# output = 3.0 volt-only single power supply (see Product Selector Guide for speed options and voltage supply tolerances) = Device ground = Pin not connected internally LOGIC SYMBOL 20 A0–A19 DQ0–DQ7 8 CE# OE# WE# RESET# RY/BY# VSS NC 21525D6 October 12, 2006 Am29LV081B 5 DATA SHEET ORDERING INFORMATION Standard Products AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below. Am29LV081B -70 E C TEMPERATURE RANGE C = Commercial (0°C to +70°C) D = Commercial (0°C to +70°C) with Pb-Free Package I = Industrial (–40°C to +85°C) F = Industrial (–40°C to +85°C) with Pb-free Package E = Extended (–55°C to +125°C) K = Extended (–55°C to +125°C) with Pb-free Package PACKAGE TYPE E = 40-Pin Thin Small Outline Package (TSOP) Standard Pinout (TS 040) SPEED OPTION See Product Selector Guide and Valid Combinations DEVICE NUMBER/DESCRIPTION Am29LV081B 8 Megabit (1 M x 8-Bit) Uniform Sector CMOS Flash Memory 3.0 Volt-only Read, Program and Erase Valid Combinations AM29LV081B-70 AM29LV081B-90 EC, EI, EF, EE, ED, EK AM29LV081B-120 EC, EI, EF, ED Valid Combinations Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations. 6 Am29LV081B 21525D6 October 12, 2006 DATA SHEET DEVICE BUS OPERATIONS This section describes the requirements and use of the device bus operations, which are initiated through the internal command register. The command register itself does not occupy any addressable memory location. The register is composed of latches that store the commands, along with the address and data information needed to execute the command. The contents of Table 1. Operation Read Write Standby Output Disable Reset Sector Protect (Note 2) Sector Unprotect (Note 2) Temporary Sector Unprotect L L VCC ± 0.3 V L X L L X the register serve as inputs to the internal state machine. The state machine outputs dictate the function of the device. Table 1 lists the device bus operations, the inputs and control levels they require, and the resulting output. The following subsections describe each of these operations in further detail. Am29LV081B Device Bus Operations OE# L H X H X H H X WE# H L X H X L L X RESET# H H VCC ± 0.3 V H L VID VID VID Addresses (Note 1) AIN AIN X X X Sector Address, A6 = L, A1 = H, A0 = L Sector Address, A6 = H, A1 = H, A0 = L X DQ0–DQ7 DOUT DIN High-Z High-Z High-Z X X X CE# Legend: L = Logic Low = VIL, H = Logic High = VIH, VID = 12.0 ± 0.5 V, X = Don’t Care, AIN = Address In, DIN = Data In, DOUT = Data Out Notes: 1. Addresses are A19–A0. 2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See the “Sector Protection/Unprotection” section. Requirements for Reading Array Data 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. 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 addresses 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. See “Reading Array Data” for more information. Refer to the AC Read Operations table for timing specifications and to Figure 13 for the timing diagram. ICC1 in the DC Characteristics table represents the active current specification for reading array data. Writing Commands/Command Sequences To write a command or command sequence (which includes programming data to the device and erasing sectors of memory), the system must drive WE# and CE# to VIL, and OE# to VIH. 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. An erase operation can erase one sector, multiple sectors, or the entire device. Table 2 indicate the address space that each sector occupies. A “sector address” consists of the address bits required to uniquely select a sector. The “Command Definitions” section has details on erasing a sector or the entire chip, or suspending/resuming the erase operation. After the system writes the autoselect command sequence, the device enters the autoselect mode. The system can then read autoselect codes from the inter7 21525D6 October 12, 2006 Am29LV081B DATA SHEET nal register (which is separate from the memory array) on DQ7–DQ0. Standard read cycle timings apply in this mode. Refer to the Autoselect Mode and Autoselect Command Sequence sections for more information. ICC2 in the DC Characteristics table represents the active current specification for the write mode. The “AC Characteristics” section contains timing specification tables and timing diagrams for write operations. Automatic Sleep Mode The automatic sleep mode minimizes Flash device energy consumption. The device automatically enables this mode when addresses remain stable for tACC + 30 ns. The automatic sleep mode is independent of the CE#, WE#, and OE# control signals. Standard address access timings provide new data when addresses are changed. While in sleep mode, output data is latched and always available to the system. ICC4 in the DC Characteristics table represents the automatic sleep mode current specification. Program and Erase Operation Status During an erase or program operation, the system may check the status of the operation by reading the status bits on DQ7–DQ0. Standard read cycle timings and ICC read specifications apply. Refer to “Write Operation Status” for more information, and to “AC Characteristics” for timing diagrams. RESET#: Hardware Reset Pin 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 i mmediately terminates a ny 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. Current is reduced for the duration of the RESET# pulse. When RESET# is held at VSS±0.3 V, the device draws CMOS standby current (ICC4). If RESET# is held at VIL but not within VSS±0.3 V, the standby current will be greater. The RESET# pin may be tied to the system reset circuitry. A system reset would thus also reset the Flash memory, enabling the system to read the boot-up firmware from the Flash memory. 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 deter mine whether the reset operation is complete. If RESET# is asserted when a program or erase operation is not executing (RY/BY# pin is “1”), the reset 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. Refer to the AC Characteristics tables for RESET# parameters and to Figure 14 for the timing diagram. Standby Mode When the system is not reading or writing to the device, it can place the device in the standby mode. In this mode, current consumption is greatly reduced, and the outputs are placed in the high impedance state, independent of the OE# input. The device enters the CMOS standby mode when the CE# and RESET# pins are both held at VCC ± 0.3 V. (Note that this is a more restricted voltage range than VIH.) If CE# and RESET# are held at VIH, but not within VCC ± 0.3 V, the device will be in the standby mode, but the standby current will be greater. The device requires standard access time (tCE) for read access when the device is in either of these standby modes, before it is ready to read data. If the device is deselected during erasure or programming, the device draws active current until the operation is completed. When the RESET# input is held at VSS ± 0.3 V, the device enters the standby mode within a period of tRPD, tristates all data output pins, and ignores all read/write attempts for the duration of the RESET# pulse. This mode is “RESET# controlled,” since CE# is don’t care under this condition. Once the RESET# pin is set high, the device requires tRH of wake up time in addition to tCE access time for reading data. This method also terminates any operation in progress and resets the device. ICC3 in the DC Characteristics table represents the standby current specification. Output Disable Mode When the OE# input is at VIH, output from the device is disabled. The output pins are placed in the high impedance state. 8 Am29LV081B 21525D6 October 12, 2006 DATA SHEET Table 2. A19 SA0 SA1 SA2 SA3 SA4 SA5 SA6 SA7 SA8 SA9 SA10 SA11 SA12 SA13 SA14 SA15 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A18 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A17 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A16 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Am29LV081B Sector Address Table A15 X X X X X X X X X X X X X X X X A14 X X X X X X X X X X X X X X X X A13 X X X X X X X X X X X X X X X X Sector Size 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes 64 Kbytes Address Range 00000h-0FFFFh 10000h-1FFFFh 20000h-2FFFFh 30000h-3FFFFh 40000h-4FFFFh 50000h-5FFFFh 60000h-6FFFFh 70000h-7FFFFh 80000h-8FFFFh 90000h-9FFFFh A0000h-AFFFFh B0000h-BFFFFh C0000h-CFFFFh D0000h-DFFFFh E0000h-EFFFFh F0000h-FFFFFh Autoselect Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on DQ7–DQ0. This mode is primarily intended for programming equipment to automatically match a device to be programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system through the command register. When using programming equipment, the autoselect mode requires VID (11.5 V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Table 3. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits (see Table 2). Table 3 shows the remaining address bits that are don’t care. When all necessary bits have been set as required, the programming equipment may then read the corresponding identifier code on DQ7–DQ0. To access the autoselect codes in-system, the host system can issue the autoselect command via the command register, as shown in Table 4. This method does not require VID. See “Command Definitions” for details on using the autoselect mode. Table 3. Am29LV081B Autoselect Codes (High Voltage Method) A19 to A13 X X A12 to A10 X X A8 to A7 X X A5 to A2 X X DQ7 to DQ0 01h 38h 01h (protected) Description Manufacturer ID: AMD Device ID: Am29LV081B CE# L L OE# L L WE# H H A9 VID VID A6 L L A1 L L A0 L H Sector Protection Verification L L H SA X VID X L X H L 00h (unprotected) L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care. 21525D6 October 12, 2006 Am29LV081B 9 DATA SHEET Sector Protection/Unprotection The hardware sector protection feature disables both program and erase operations in any sector. The hardware sector unprotection feature re-enables both program and erase operations in previously protected sectors. Sector protection/unprotection can be implemented via two methods. The primary method requires VID on the RESET# pin only, and can be implemented either in-system or via programming equipment. Figure 2 shows the algo rithms and Figure 21 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector unprotect, all unprotected sectors must first be protected prior to the first sector unprotect write cycle. The alternate method intended only for programming equipment requires VID on address pin A9, OE#, and RESET#. This method is compatible with programmer routines written for earlier 3.0 volt-only AMD flash devices. Publication number 21225 contains further details; contact an AMD representative to request a copy. The device is shipped with all sectors unprotected. AMD offers the option of programming and protecting sectors at its factory prior to shipping the device through AMD’s ExpressFlash™ Service. Contact an AMD representative for details. It is possible to determine whether a sector is protected or unprotected. See “Autoselect Mode” for details. Low VCC Write Inhibit When VCC is less than VLKO, the device does not accept any write cycles. This protects data during VCC power-up and power-down. The command register and all internal program/erase circuits are disabled, and the device resets. Subsequent writes are ignored until VCC is greater than VLKO. The system must provide the proper signals to the control pins to prevent unintentional writes when VCC is greater than VLKO. Write Pulse “Glitch” Protection Noise pulses of less than 5 ns (typical) on OE#, CE# or WE# do not initiate a write cycle. Logical Inhibit Write cycles are 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 Inhibit If WE# = CE# = VIL and OE# = VIH during power up, the device does not accept commands on the rising edge of WE#. The internal state machine is automatically reset to reading array data on power-up. START Temporary Sector Unprotect This feature allows temporary unprotection of previously protected sectors to change data in-system. The Sector Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly protected sectors can be programmed or erased by selecting the sector addresses. Once VID is removed from the RESET# pin, all the previously protected sectors are protected again. Figure 1 shows the algorithm, and Figure 20 shows the timing diagrams, for this feature. RESET# = VID (Note 1) Perform Erase or Program Operations RESET# = VIH Hardware Data Protection The command sequence requirement of unlock cycles for programming or erasing provides data protection against inadvertent writes (refer to Table 4 for command definitions). In addition, the following hardware data protection measures prevent accidental erasure or programming, which might otherwise be caused by spurious system level signals during VCC power-up and power-down transitions, or from system noise. Temporary Sector Unprotect Completed (Note 2) Notes: 1. All protected sectors unprotected. 2. All previously protected sectors are protected once again. Figure 1. Temporary Sector Unprotect Operation 10 Am29LV081B 21525D6 October 12, 2006 DATA SHEET START Protect all sectors: The indicated portion of the sector protect algorithm must be performed for all unprotected sectors prior to issuing the first sector unprotect address PLSCNT = 1 RESET# = VID Wait 1 μs START PLSCNT = 1 RESET# = VID Wait 1 μs Temporary Sector Unprotect Mode No First Write Cycle = 60h? Yes Set up sector address Sector Protect: Write 60h to sector address with A6 = 0, A1 = 1, A0 = 0 Wait 150 µs Verify Sector Protect: Write 40h to sector address with A6 = 0, A1 = 1, A0 = 0 Read from sector address with A6 = 0, A1 = 1, A0 = 0 No No First Write Cycle = 60h? Yes All sectors protected? Yes Set up first sector address Sector Unprotect: Write 60h to sector address with A6 = 1, A1 = 1, A0 = 0 Temporary Sector Unprotect Mode Increment PLSCNT Reset PLSCNT = 1 Wait 15 ms Verify Sector Unprotect: Write 40h to sector address with A6 = 1, A1 = 1, A0 = 0 No No PLSCNT = 25? Yes Data = 01h? Increment PLSCNT Yes No Yes No Read from sector address with A6 = 1, A1 = 1, A0 = 0 Set up next sector address Device failed Protect another sector? No Remove VID from RESET# PLSCNT = 1000? Yes Data = 00h? Yes Device failed Write reset command Last sector verified? Yes No Sector Protect Algorithm Sector Protect complete Sector Unprotect Algorithm Remove VID from RESET# Write reset command Sector Unprotect complete Figure 2. In-System Sector Protect/Unprotect Algorithms 21525D6 October 12, 2006 Am29LV081B 11 DATA SHEET COMMAND DEFINITIONS Writing specific address and data commands or sequences into the command register initiates device operations. Table 4 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. All addresses are latched on the falling edge of WE# or CE#, whichever happens later. All data is latched on the rising edge of WE# or CE#, whichever happens first. Refer to the appropriate timing diagrams in the “AC Characteristics” section. The reset command may be written between the sequence cycles in an autoselect command sequence. Once in the autoselect mode, the reset command must be written to return to reading array data (also applies to autoselect during Erase Suspend). If DQ5 goes high during a program or erase operation, writing the reset command returns the device to reading array data (also applies during Erase Suspend). Autoselect Command Sequence The autoselect command sequence allows the host system to access the manufacturer and devices codes, and determine whether or not a sector is protected. Table 4 shows the address and data requirements. This method is an alternative to that shown in Table 3, which is intended for PROM programmers and requires VID on address bit A9. The autoselect command sequence is initiated by writing two unlock cycles, followed by the autoselect command. The device then enters the autoselect mode, and the system may read at any address any number of times, without initiating another command sequence. A read cycle at address 00h retrieves the manufacturer code. A read cycle at address 01h returns the device code. A read cycle containing a sector address (SA) and the address 02h returns 01h if that sector is protected, or 00h if it is unprotected. Refer to Table 2 for valid sector addresses. The system must write the reset command to exit the autoselect mode and return to reading array data. Reading Array Data 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 Embedded Program or Embedded Erase algorithm. After the device accepts an Erase Suspend com mand, 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 erase-suspended 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 information on this mode. The system must issue the reset command to re-enable the device for reading array data if DQ5 goes high, or while in the autoselect mode. See the “Reset Command” section, next. See also “Requirements for Reading Array Data” in the “Device Bus Operations” section for more information. The Read Operations table provides the read parameters, and Figure 13 shows the timing diagram. Byte Program Command Sequence The byte program command sequence programs one byte into the device. 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. 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 4 shows the address and data requirements for the byte program command sequence. 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 DQ7, DQ6, or RY/BY#. See “Write Operation Status” for information on these status bits. 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 se 21525D6 October 12, 2006 Reset Command 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. The reset command may be written between the sequence cycles in a program command sequence before 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. 12 Am29LV081B DATA SHEET quence should be reinitiated once the device has reset to reading array data, to ensure data integrity. Programming is allowed in any sequence and across sector boundaries. A b it cannot be programmed from a “0” back to a “1”. Attempting to do so may halt the operation and set DQ5 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”. Unlock Bypass Command Sequence The unlock bypass feature allows the system to program bytes to the device faster than using the standard program command sequence. The unlock bypass command sequence is initiated by first writing two unlock cycles. This is followed by a third write cycle containing the unlock bypass command, 20h. The device then enters the unlock bypass mode. A two-cycle unlock bypass program command sequence is all that is required to program in this mode. The first cycle in this sequence contains the unlock bypass program com mand, A0h; the second cycle contains the program address and data. Additional data is programmed in the same manner. This mode dispenses with the initial two unlock cycles required in the standard program command sequence, resulting in faster total programming time. Table 4 shows the requirements for the command sequence. During the unlock bypass mode, only the Unlock Bypass Program and Unlock Bypass Reset commands are valid. To exit the unlock bypass mode, the system must issue the two-cycle unlock bypass reset command sequence. The first cycle must contain the data 90h; the second cycle the data 00h. The device then returns to reading array data. Figure 3 illustrates the algorithm for the program operation. See the Erase/Program Operations table in “AC Characteristics” for parameters, and to Figure 15 for timing diagrams. Embedded Program algorithm in progress START Write Program Command Sequence Data Poll from System Verify Data? No Yes No Increment Address Last Address? Yes Programming Completed Note: See Table 4 for program command sequence. Figure 3. Program Operation Any commands written to the chip during the Embedded Erase algorithm are ignored. Note that a hardware reset during the chip erase operation immediately terminates the operation. The Chip Erase command sequence should be reinitiated once the device has returned to reading array data, to ensure data integrity. The system can determine the status of the erase operation by using DQ7, DQ6, DQ2, or RY/BY#. See “Write Operation Status” for information on these status bits. When the Embedded Erase algorithm is complete, the device returns to reading array data and addresses are no longer latched. Figure 4 illustrates the algorithm for the erase operation. See the Erase/Program Operations tables in “AC Characteristics” for parameters, and to Figure 16 for timing diagrams. Chip Erase Command Sequence Chip erase is a six bus cycle operation. The chip erase command sequence is initiated by writing two unlock cycles, followed by a set-up command. Two additional unlock write cycles are then followed by the chip erase command, which in turn invokes the Embedded Erase algorithm. The device does not require the system to preprogram prior to erase. The Embedded Erase algorithm automatically preprograms and verifies the entire memory for an all zero data pattern prior to electrical erase. The system is not required to provide any controls or timings during these operations. Table 4 shows the address and data requirements for the chip erase command sequence. Sector Erase Command Sequence Sector erase is a six bus cycle operation. The sector erase command sequence is initiated by writing two unlock cycles, followed by a set-up command. Two additional unlock write cycles are then followed by the address of the sector to be erased, and the sector 21525D6 October 12, 2006 Am29LV081B 13 DATA SHEET erase command. Table 4 shows the address and data requirements for the sector erase command sequence. The device does not require the system to preprogram the memory prior to erase. The Embedded Erase algorithm automatically programs and verifies the sector for an all zero data pattern prior to electrical erase. The system is not required to provide any controls or timings during these operations. After the command sequence is written, a sector erase time-out of 50 µs begins. During the time-out period, additional sector addresses and sector erase commands may be written. Loading the sector erase buffer may be done in any sequence, and the number of sectors may be from one sector to all sectors. The time between these additional cycles must be less than 50 µs, otherwise the last address and command might not be accepted, and erasure may begin. It is recommended that processor interrupts be disabled during this time to ensure all commands are accepted. The interrupts can be re-enabled after the last Sector Erase command is written. If the time between additional sector erase commands can be assumed to be less than 50 µs, the system need not monitor DQ3. Any command other than Sector Erase or Erase Suspend during the time-out period resets the device to reading array data. The system must rewrite the command sequence and any additional sector addresses and commands. The system can monitor DQ3 to determine if the sector erase timer has timed out. (See the “DQ3: Sector Erase Timer” section.) The time-out begins from the rising edge of the final WE# pulse in the command sequence. Once the sector erase operation has begun, only the Erase Suspend command is valid. All other commands are ignored. Note that a hardware reset during the sector erase operation immediately terminates the operation. The Sector Erase command sequence should be reinitiated once the device has returned to reading array data, to ensure data integrity. When the Embedded Erase algorithm is complete, the device returns to reading array data and addresses are no longer latched. The system can determine the status of the erase operation by using DQ7, DQ6, DQ2, or RY/BY#. (Refer to “Write Operation Status” for information on these status bits.) Figure 4 illustrates the algorithm for the erase operation. Refer to the Erase/Program Operations tables in the “AC Characteristics” section for parameters, and to Figure 16 for timing diagrams. Erase Suspend/Erase Resume Commands The Erase Suspend command allows the system to interrupt a sector erase operation and then read data from, or program data to, any sector not selected for erasure. This command is valid only during the sector erase operation, including the 50 µs time-out period during the sector erase command sequence. The Erase Suspend command is ignored if written during the chip erase operation or Embedded Program algorithm. Writing the Erase Suspend command during the Sector Erase time-out immediately terminates the time-out period and suspends the erase operation. Addresses are “don’t-cares” when writing the Erase Suspend command. When the Erase Suspend command is written during a sector erase operation, the device requires a maximum of 20 µs to suspend the erase operation. 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 the erase operation has been suspended, the system can read array data from or program data to any sector not selected for erasure. (The device “erase suspends” all sectors selected for erasure.) Normal read and write timings and command definitions apply. Reading at any address within erase-suspended sectors produces status data on DQ7–DQ0. The system can use DQ7, or DQ6 and DQ2 together, to determine if a sector is actively erasing or is erase-suspended. See “Write Operation Status” for information on these status bits. After an erase-suspended program operation is complete, the system can once again read array data within non-suspended sectors. The system can determine the status of the program operation using the DQ7 or DQ6 status bits, just as in the standard program operation. See “Write Operation Status” for more information. 14 Am29LV081B 21525D6 October 12, 2006 DATA SHEET The system may also write the autoselect command sequence when the device is in the Erase Suspend mode. The device allows reading autoselect codes even at addresses within erasing sectors, since the codes are not stored in the memory array. When the device exits the autoselect mode, the device reverts to the Erase Suspend mode, and is ready for another valid operation. See “Autoselect Command Sequence” for more information. The system must write the Erase Resume command (address bits are “don’t care”) to exit the erase suspend mode and continue the sector erase operation. Further writes of the Resume command are ignored. Another Erase Suspend command can be written after the device has resumed erasing. No START Write Erase Command Sequence Data Poll from System Embedded Erase algorithm in progress Data = FFh? Yes Erasure Completed Notes: 1. See Table 4 for erase command sequence. 2. See “DQ3: Sector Erase Timer” for more information. Figure 4. Erase Operation 21525D6 October 12, 2006 Am29LV081B 15 DATA SHEET Command Definitions Table 4. Command Sequence (Note 1) Read (Note 5) Reset (Note 6) Manufacturer ID AutoDevice ID select (Note 7) Sector Protect Verify (Note 8) Program Unlock Bypass Unlock Bypass Program (Note 9) Unlock Bypass Reset (Note 10) Chip Erase Sector Erase Erase Suspend (Note 11) Erase Resume (Note 12) Legend: X = Don’t care RA = Address of the memory location to be read. RD = Data read from location RA during read operation. PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the WE# or CE# pulse, whichever happens later. Notes: 1. See Table 1 for description of bus operations. 2. All values are in hexadecimal. 3. Except when reading array or autoselect data, all bus cycles are write operations. 4. All address bits are don’t cares for unlock and command cycles, except when SA or PA required. 5. No unlock or command cycles required when reading array data. 6. The Reset command is required to return to reading array data when device is in the autoselect mode, or if DQ5 goes high (while the device is providing status data). 7. The fourth cycle of the autoselect command sequence is a read cycle. PD = Data to be programmed at location PA. Data latches on the rising edge of WE# or CE# pulse, whichever happens first. SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A19–A13 uniquely select any sector. Cycles Am29LV081B Command Definitions Bus Cycles (Notes 2-4) First Second Addr Data RD F0 AA AA AA AA AA A0 90 AA AA B0 30 XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX 55 55 55 55 55 PD 00 55 55 XXX XXX 80 80 XXX XXX AA AA XXX XXX 55 55 XXX SA 10 30 XXX XXX XXX XXX XXX XXX 90 90 90 A0 20 X00 X01 (SA) X02 PA 01 38 00 01 PD Third Addr Fourth Data Fifth Addr Data Sixth Addr Data Addr RA XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX Data Data Addr 1 1 4 4 4 4 3 2 2 6 6 1 1 8. The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence” for more information. 9. The Unlock Bypass command is required prior to the Unlock Bypass Program command. 10. The Unlock Bypass Reset command is required to return to reading array data when the device is in the unlock bypass mode. 11. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode. The Erase Suspend command is valid only during a sector erase operation. 12. The Erase Resume command is valid only during the Erase Suspend mode. 16 Am29LV081B 21525D6 October 12, 2006 DATA SHEET WRITE OPERATION STATUS The device provides several bits to determine the status of a write operation: DQ2, DQ3, DQ5, DQ6, DQ7, and RY/BY#. Table 5 and the following subsections describe the functions of these bits. DQ7, 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. Table 5 shows the outputs for Data# Polling on DQ7. Figure 5 shows the Data# Polling algorithm. START DQ7: Data# Polling The Data# Polling bit, DQ7, indicates to the host system whether an Embedded 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. During the Embedded Program algorithm, the device outputs on DQ7 the complement of the datum programmed to DQ7. This DQ7 status also applies to programming during Erase Suspend. When the Embedded Program algorithm is complete, the device outputs the datum programmed to DQ7. The system must provide the program address to read valid status information on DQ7. If a program address falls within a protected sector, Data# Polling on DQ7 is active for approximately 1 µs, then the device returns to reading array data. During the Embedded Erase algorithm, Data# Polling produces a “0” on DQ7. When the Embedded Erase algorithm is complete, or if the device enters the Erase Suspend mode, Data# Polling produces a “1” on DQ7. This is analogous to the complement/true datum output described for the Embedded 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 DQ7. After an erase command sequence is written, if all sectors selected for erasing are protected, Data# Polling on DQ7 is active for approximately 100 µs, then the device returns to reading array data. If not all selected sectors are protected, the Embedded Erase algorithm erases the unprotected sectors, and ignores the selected sectors that are protected. When the system detects DQ7 has changed from the complement to true data, it can read valid data at DQ7– DQ0 on the following read cycles. This is because DQ7 may change asynchronously with DQ0–DQ6 while Output Enable (OE#) is asserted low. Figure 17, Data# Polling Timings (During Embedded Algorithms), in the “AC Characteristics” section illustrates this. Read DQ7–DQ0 Addr = VA DQ7 = Data? Yes No No DQ5 = 1? Yes Read DQ7–DQ0 Addr = VA DQ7 = Data? Yes No FAIL PASS Notes: 1. VA = Valid address for programming. During a sector erase operation, a valid address is an address within any sector selected for erasure. During chip erase, a valid address is any non-protected sector address. 2. DQ7 should be rechecked even if DQ5 = “1” because DQ7 may change simultaneously with DQ5. Figure 5. Data# Polling Algorithm 21525D6 October 12, 2006 Am29LV081B 17 DATA SHEET RY/BY#: Ready/Busy# The RY/BY# is a dedicated, open-drain output pin that indicates whether an Embedded Algorithm is in progress or complete. The RY/BY# status is valid after the rising edge of the final WE# pulse 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. 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. Table 5 shows the outputs for RY/BY#. Figures 14, 15 and 16 shows RY/BY# for reset, program, and erase operations, respectively. Table 5 shows the outputs for Toggle Bit I on DQ6. Figure 6 shows the toggle bit algorithm. Figure 18 in the “AC Characteristics” section shows the toggle bit timing diagrams. Figure 19 shows the differences between DQ2 and DQ6 in graphical form. See also the subsection on DQ2: Toggle Bit II. DQ2: Toggle Bit II The “Toggle Bit II” on DQ2, when used with DQ6, indicates whether a particular sector is actively erasing (that is, the Embedded Erase algorithm is in progress), or whether that sector is erase-suspended. Toggle Bit II is valid after the rising edge of the final WE# pulse in the command sequence. DQ2 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 DQ2 cannot distinguish whether the sector is actively erasing or is erase-suspended. DQ6, 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 sector and mode information. Refer to Table 5 to compare outputs for DQ2 and DQ6. Figure 6 shows the toggle bit algorithm in flowchart form, and the section “DQ2: Toggle Bit II” explains the algorithm. See also the DQ6: Toggle Bit I subsection. Figure 18 shows the toggle bit timing diagram. Figure 19 shows the differences between DQ2 and DQ6 in graphical form. DQ6: Toggle Bit I Toggle Bit I on DQ6 indicates whether an Embedded 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# pulse in the command sequence (prior to the program or erase operation), and during the sector erase time-out. During an Embedded Program or Erase algorithm operation, successive read cycles to any address cause DQ6 to toggle. The system may use either OE# or CE# to control the read cycles. When the operation is complete, DQ6 stops toggling. After an erase command sequence is written, if all sectors selected for erasing are protected, DQ6 toggles for approximately 100 µs, then returns to reading array data. If not all selected sectors are protected, the Embedded Erase algorithm erases the unprotected sectors, and ignores the selected sectors that are protected. The system can use DQ6 and DQ2 together to determine whether a sector is actively erasing or is erasesuspended. When the device is actively erasing (that is, the Embedded Erase algorithm is in progress), DQ6 toggles. When the device enters the Erase Suspend mode, DQ6 stops toggling. However, the system must also use DQ2 to determine which sectors are erasing or erase-suspended. Alternatively, the system can use DQ7 (see the subsection on DQ7: Data# Polling). If a program address falls within a protected sector, DQ6 toggles for approximately 1 µs after the program command sequence is written, then returns to reading array data. DQ6 also toggles during the erase-suspend-program mode, and stops toggling once the Embedded Program algorithm is complete. Reading Toggle Bits DQ6/DQ2 Refer to Figure 6 for the following discussion. Whenever the system initially begins reading toggle bit status, it must read DQ7–DQ0 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 DQ7–DQ0 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 DQ5 is high (see the section on DQ5). 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 DQ5 went 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 completed the operation successfully, and the system must write the reset command to return to reading array data. 18 Am29LV081B 21525D6 October 12, 2006 DATA SHEET The remaining scenario is that the system initially determines that the toggle bit is toggling and DQ5 has not gone high. The system may continue to monitor the toggle bit and DQ5 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 Figure 6). DQ5: Exceeded Timing Limits DQ5 indicates whether the program or erase time has exceeded a specified internal pulse count limit. Under these conditions DQ5 produces a “1.” This is a failure condition that indicates the program or erase cycle was not successfully completed. The DQ5 failure condition may appear if the system tries to program a “1” to a location that is previously programmed to “0.” Only an erase operation can change a “0” back to a “1.” Under this condition, the device halts the operation, and when the operation has exceeded the timing limits, DQ5 produces a “1.” Under both these conditions, the system must issue the reset command to return the device to reading array data. START Read DQ7–DQ0 (Note 1) DQ3: Sector Erase Timer After writing a sector erase command sequence, the system may read DQ3 to determine whether or not an erase operation has begun. (The sector erase timer does not apply to the chip erase command.) If additional sectors are selected for erasure, the entire time-out also applies after each additional sector erase command. When the time-out is complete, DQ3 switches from “0” to “1.” If the time between additional sector erase commands from the system can be assumed to be less than 50 μs, the system need not monitor DQ3. See also the “Sector Erase Command Sequence” section. After the sector erase command sequence is written, the system should read the status on DQ7 (Data# Polling) or DQ6 (Toggle Bit I) to ensure the device has accepted the command sequence, and then read DQ3. If DQ3 is “1”, the internally controlled erase cycle has begun; all further commands (other than Erase Suspend) are ignored until the erase operation is complete. If DQ3 is “0”, the device will accept additional sector erase commands. To ensure the command has been accepted, the system software should check the status of DQ3 prior to and following each subsequent sector erase command. If DQ3 is high on the second status check, the last command might not have been ac cepted. Table 5 shows the outputs for DQ3. Read DQ7–DQ0 Toggle Bit = Toggle? Yes No No DQ5 = 1? Yes Read DQ7–DQ0 Twice (Notes 1, 2) Toggle Bit = Toggle? No Yes Program/Erase Operation Not Complete, Write Reset Command Program/Erase Operation Complete Notes: 1. Read toggle bit twice to determine whether or not it is toggling. See text. 2. Recheck toggle bit because it may stop toggling as DQ5 changes to “1” . See text. Figure 6. Toggle Bit Algorithm 21525D6 October 12, 2006 Am29LV081B 19 DATA SHEET Table 5. Operation Standard Mode Erase Suspend Mode Embedded Program Algorithm Embedded Erase Algorithm Reading within Erase Suspended Sector Reading within Non-Erase Suspended Sector Erase-Suspend-Program Write Operation Status DQ6 Toggle Toggle No toggle Data Toggle DQ5 (Note 1) 0 0 0 Data 0 DQ3 N/A 1 N/A Data N/A DQ2 (Note 2) No toggle Toggle Toggle Data N/A RY/BY# 0 0 1 1 0 DQ7 (Note 2) DQ7# 0 1 Data DQ7# Notes: 1. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits. See “DQ5: Exceeded Timing Limits” for more information. 2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details. 20 Am29LV081B 21525D6 October 12, 2006 DATA SHEET ABSOLUTE MAXIMUM RATINGS Storage Temperature Plastic Packages . . . . . . . . . . . . . . . –65°C to +150°C Ambient Temperature with Power Applied. . . . . . . . . . . . . . –65°C to +125°C 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 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 7. 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. See Figure 8. 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 7. 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 Ratings” 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. VCC +2.0 V VCC +0.5 V 2.0 V 20 ns 20 ns 20 ns +0.8 V –0.5 V –2.0 V 20 ns 20 ns Figure 7. Maximum Negative Overshoot Waveform 20 ns Figure 8. Maximum Positive Overshoot Waveform OPERATING RANGES Commercial (C) Devices Ambient Temperature (TA) . . . . . . . . . . . 0°C to +70°C Industrial (I) Devices Ambient Temperature (TA) . . . . . . . . . –40°C to +85°C Extended (E) Devices Ambient Temperature (TA) . . . . . . . . –55°C to +125°C 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. 21525D6 October 12, 2006 Am29LV081B 21 DATA SHEET DC CHARACTERISTICS CMOS Compatible Parameter ILI ILIT ILO ICC1 ICC2 ICC3 ICC4 ICC5 VIL VIH VID VOL VOH1 VOH2 VLKO Low VCC Lock-Out Voltage (Note 5) Description Input Load Current A9 Input Load Current Output Leakage Current VCC Active Read Current (Notes 1, 2) VCC Active Write Current (Notes 2, 3, 5) VCC Standby Current (Note 2) VCC Reset Current (Note 2) Automatic Sleep Mode (Notes 2, 4) Input Low Voltage Input High Voltage Voltage for Autoselect and Temporary Sector Unprotect Output Low Voltage Output High Voltage VCC = 3.3 V IOL = 4.0 mA, VCC = VCC min IOH = –2.0 mA, VCC = VCC min IOH = –100 µA, VCC = VCC min 0.85 VCC VCC–0.4 2.3 2.5 V Test Conditions VIN = VSS to VCC, VCC = VCC max VCC = VCC max; A9 = 12.5 V VOUT = VSS to VCC, VCC = VCC max 5 MHz CE# = VIL, OE# = VIH CE# = VIL, OE# = VIH CE#, RESET# = VCC ± 0.3 V RESET# = VSS ± 0.3 V VIH = VCC ± 0.3 V; VIL = VSS ± 0.3 V –0.5 0.7 x VCC 11.5 1 MHz 7 2 15 0.2 0.2 0.2 Min Typ Max ±1.0 35 ± 1.0 12 mA 4 30 5 5 5 0.8 VCC + 0.3 12.5 0.45 mA µA µA µA V V V V V Unit µA µA µA Notes: 1. The ICC current listed is typically less than 2 mA/MHz, with OE# at VIL. Typical VCC is 3.0 V. 2. Maximum ICC specifications are tested with VCC = VCCmax. 3. ICC active while Embedded Erase or Embedded Program is in progress. 4. Automatic sleep mode enables the low power mode when addresses remain stable for tACC + 30 ns. 5. Not 100% tested. 22 Am29LV081B 21525D6 October 12, 2006 DATA SHEET DC CHARACTERISTICS (CONTINUED) Zero Power Flash 20 Supply Current in mA 15 10 5 0 0 500 1000 1500 2000 Time in ns Note: Addresses are switching at 1 MHz 2500 3000 3500 4000 Figure 9. ICC1 Current vs. Time (Showing Active and Automatic Sleep Currents) 10 8 Supply Current in mA 3.6 V 6 2.7 V 4 2 0 1 2 3 Frequency in MHz 4 5 Note: T = 25 °C Figure 10. Typical ICC1 vs. Frequency 21525D6 October 12, 2006 Am29LV081B 23 DATA SHEET TEST CONDITIONS Table 6. 3.3 V 2.7 kΩ Test Condition Output Load Output Load Capacitance, CL (including jig capacitance) Input Rise and Fall Times Input Pulse Levels Input timing measurement reference levels Note: Diodes are IN3064 or equivalent 30 5 0.0–3.0 1.5 1.5 -70 -90, -120 1 TTL gate 100 pF ns V V V Unit Test Specifications Device Under Test CL 6.2 kΩ Figure 11. Test Setup Output timing measurement reference levels Key to Switching Waveforms WAVEFORM INPUTS Steady Changing from H to L Changing from L to H Don’t Care, Any Change Permitted Does Not Apply Changing, State Unknown Center Line is High Impedance State (High Z) OUTPUTS 3.0 V 0.0 V Input 1.5 V Measurement Level 1.5 V Output Figure 12. Input Waveforms and Measurement Levels 24 Am29LV081B 21525D6 October 12, 2006 DATA SHEET AC CHARACTERISTICS Read Operations Parameter JEDEC tAVAV tAVQV tELQV tGLQV tEHQZ tGHQZ Std tRC tACC tCE tOE tDF tDF tOEH Description Read Cycle Time (Note 1) Address to Output Delay Chip Enable to Output Delay Output Enable to Output Delay Chip Enable to Output High Z (Note 1) Output Enable to Output High Z (Note 1) Read Output Enable Hold Time (Note 1) Toggle and Data# Polling CE# = VIL OE# = VIL OE# = VIL Test Setup Min Max Max Max Max Max Min Min Min -70 70 70 70 30 25 25 Speed Option -90 90 90 90 35 30 30 0 10 0 -120 120 120 120 50 30 30 Unit ns ns ns ns ns ns ns ns ns tAXQX tOH Output Hold Time From Addresses, CE# or OE#, Whichever Occurs First (Note 1) Notes: 1. Not 100% tested. 2. See Figure 11 Figure 11and Table 6Table 6 for test specifications. tRC Addresses CE# tOE tOEH WE# HIGH Z Outputs RESET# RY/BY# Output Valid tCE tOH HIGH Z tDF Addresses Stable tACC OE# 0V Figure 13. Read Operations Timings 21525D6 October 12, 2006 Am29LV081B 25 DATA SHEET AC CHARACTERISTICS Hardware Reset (RESET#) Parameter JEDEC Std tREADY tREADY tRP tRH tRPD tRB Description RESET# Pin Low (During Embedded Algorithms) to Read or Write (See Note) RESET# Pin Low (NOT During Embedded Algorithms) to Read or Write (See Note) RESET# Pulse Width RESET# High Time Before Read (See Note) RESET# Low to Standby Mode RY/BY# Recovery Time Test Setup Max Max Min Min Min Min All Speed Options 20 500 500 50 20 0 Unit µs ns ns ns µs ns Note: Not 100% tested. RY/BY# CE#, OE# tRH RESET# tRP tReady Reset Timings NOT during Embedded Algorithms Reset Timings during Embedded Algorithms tReady RY/BY# tRB CE#, OE# RESET# tRP Figure 14. RESET# Timings 26 Am29LV081B 21525D6 October 12, 2006 DATA SHEET AC CHARACTERISTICS Erase/Program Operations Parameter JEDEC tAVAV tWLAX tDVWH tWLWH tAVWL tWHDX Std tWC tAH tDS tWP tAS tDH tOES tGHWL tELWL tWHEH tWHWL tWHWH1 tWHWH2 tGHWL tCS tCH tWPH tWHWH1 tWHWH2 tVCS tRB tBUSY Notes: 1. Not 100% tested. 2. See the “Erase and Programming Performance” section for more information. Description Write Cycle Time (Note 1) Address Hold Time Data Setup Time Write Pulse Width Address Setup Time Data Hold Time Output Enable Setup Time Read Recovery Time Before Write (OE# High to WE# Low) CE# Setup Time CE# Hold Time Write Pulse Width High Byte Programming Operation (Note 2) Word Sector Erase Operation (Note 2) VCC Setup Time (Note 1) Recovery Time from RY/BY# Program/Erase Valid to RY/BY# Delay Typ Typ Min Min Max 11 0.7 50 0 90 sec µs ns ns Min Min Min Min Min Min Min Min Min Min Min Typ -70 70 45 35 35 Speed Options -90 90 45 45 35 0 0 0 0 0 0 30 9 µs -120 120 50 50 50 Unit ns ns ns ns ns ns ns ns ns ns ns 21525D6 October 12, 2006 Am29LV081B 27 DATA SHEET AC CHARACTERISTICS Program Command Sequence (last two cycles) tWC Addresses XXX tAS PA tAH CE# OE# tWP WE# tCS tDS Data tDH PD tBUSY RY/BY# Status DOUT tRB tWPH tWHWH1 PA PA Read Status Data (last two cycles) tCH A0h VCC tVCS Note: PA = program address, PD = program data, DOUT is the true data at the program address. Figure 15. Program Operation Timings 28 Am29LV081B 21525D6 October 12, 2006 DATA SHEET AC CHARACTERISTICS Erase Command Sequence (last two cycles) tWC Addresses XXX tAS SA 555h for chip erase Read Status Data VA tAH VA CE# OE# tWP WE# tCS tDS tCH tWPH tWHWH2 tDH Data 55h 30h 10 for Chip Erase In Progress Complete tBUSY RY/BY# tVCS VCC tRB Note: SA = sector address (for Sector Erase), VA = Valid Address for reading status data (see “Write Operation Status”). Figure 16. Chip/Sector Erase Operation Timings 21525D6 October 12, 2006 Am29LV081B 29 DATA SHEET AC CHARACTERISTICS tRC Addresses VA tACC tCE CE# tCH OE# tOEH WE# tOH DQ7 High Z VA VA tOE tDF Complement Complement True Valid Data High Z DQ0–DQ6 tBUSY RY/BY# Status Data Status Data True Valid Data Note: VA = Valid address. Illustration shows first status cycle after command sequence, last status read cycle, and array data read cycle. Figure 17. Data# Polling Timings (During Embedded Algorithms) tRC Addresses VA tACC tCE CE# tCH OE# tOEH WE# tOH DQ6/DQ2 tBUSY RY/BY# High Z VA VA VA tOE tDF Valid Status (first read) Valid Status (second read) Valid Status (stops toggling) Valid Data Note: VA = Valid address; not required for DQ6. Illustration shows first two status cycle after command sequence, last status read cycle, and array data read cycle. Figure 18. Toggle Bit Timings (During Embedded Algorithms) 30 Am29LV081B 21525D6 October 12, 2006 DATA SHEET AC CHARACTERISTICS Enter Embedded Erasing WE# Erase Suspend Erase Enter Erase Suspend Program Erase Suspend Program Erase Resume Erase Suspend Read Erase Erase Complete Erase Suspend Read DQ6 DQ2 Note: The system may use CE# or OE# to toggle DQ2 and DQ6. DQ2 toggles only when read at an address within an erase-suspended sector. Figure 19. DQ2 vs. DQ6 Temporary Sector Unprotect Parameter JEDEC Std tVIDR tRSP Description VID Rise and Fall Time (See Note) RESET# Setup Time for Temporary Sector Unprotect Min Min All Speed Options 500 4 Unit ns µs Note: Not 100% tested. 12 V RESET# 0 or 3 V tVIDR Program or Erase Command Sequence CE# tVIDR 0 or 3 V WE# tRSP RY/BY# Figure 20. Temporary Sector Unprotect Timing Diagram 21525D6 October 12, 2006 Am29LV081B 31 DATA SHEET AC CHARACTERISTICS VID VIH RESET# SA, A6, A1, A0 Valid* Sector Protect/Unprotect Valid* Verify 40h Sector Protect: 150 µs Sector Unprotect: 15 ms Valid* Data 1 µs CE# 60h 60h Status WE# OE# * For sector protect, A6 = 0, A1 = 1, A0 = 0. For sector unprotect, A6 = 1, A1 = 1, A0 = 0. Figure 21. Sector Protect/Unprotect Timing Diagram 32 Am29LV081B 21525D6 October 12, 2006 DATA SHEET AC CHARACTERISTICS Alternate CE# Controlled Erase/Program Operations Parameter JEDEC tAVAV tELAX tDVEH tELEH tAVEL tEHDX Std tWC tAH tDS tCP tAS tDH tOES tGHEL tWLEL tEHWH tEHEL tWHWH1 tWHWH2 tGHEL tWS tWH tCPH tWHWH1 tWHWH2 Description Write Cycle Time (Note 1) Address Hold Time Data Setup Time CE# Pulse Width Address Setup Time Data Hold Time Output Enable Setup Time Read Recovery Time Before Write (OE# High to WE# Low) WE# Setup Time WE# Hold Time CE# Pulse Width High Programming Operation (Note 2) Sector Erase Operation (Note 2) Min Min Min Min Min Min Min Min Min Min Min Typ Typ -70 70 45 35 35 Speed Options -90 90 45 45 35 0 0 0 0 0 0 30 9 0.7 -120 120 50 50 50 Unit ns ns ns ns ns ns ns ns ns ns ns µs sec Notes: 1. Not 100% tested. 2. See the “Erase and Programming Performance” section for more information. 21525D6 October 12, 2006 Am29LV081B 33 DATA SHEET AC CHARACTERISTICS XXX for program XXX for erase PA for program SA for sector erase XXX for chip erase Data# Polling PA Addresses tWC tWH WE# tGHEL OE# tCP CE# tWS tCPH tDS tDH Data A0 for program 55 for erase PD for program 30 for sector erase 10 for chip erase tAS tAH tWHWH1 or 2 DQ7# DOUT Notes: 1. PA = program address, PD = program data, DQ7# = complement of the data written to the device, DOUT = data written to the device. 2. Figure indicates the last two bus cycles of the command sequence. Figure 22. Alternate CE# Controlled Write Operation Timings 34 Am29LV081B 21525D6 October 12, 2006 DATA SHEET ERASE AND PROGRAMMING PERFORMANCE Parameter Sector Erase Time Chip Erase Time Byte Programming Time Chip Programming Time (Note 3) Typ (Note 1) 0.7 11 9 9 300 27 Max (Note 2) 15 Unit s s µs s Excludes system level overhead (Note 5) Comments Excludes 00h programming prior to erasure (Note 4) Notes: 1. Typical program and erase times assume the following conditions: 25°C, 3.0 V VCC, 1,000,000 cycles. Additionally, programming typicals assume checkerboard pattern. 2. Under worst case conditions of 90°C, VCC = 2.7 V, 1,000,000 cycles. 3. The typical chip programming time is considerably less than the maximum chip programming time listed, since most bytes program faster than the maximum program times listed. 4. In the pre-programming step of the Embedded Erase algorithm, all bytes are programmed to 00h before erasure. 5. System-level overhead is the time required to execute the two- or four-bus-cycle sequence for the program command. See Table 4 for further information on command definitions. 6. The device has a minimum erase and program cycle endurance of 1,000,000 cycles. LATCHUP CHARACTERISTICS Description Input voltage with respect to VSS on all pins except I/O pins (including A9, OE#, and RESET#) Input voltage with respect to VSS on all I/O pins VCC Current Includes all pins except VCC. Test conditions: VCC = 3.0 V, one pin at a time. Min –1.0 V –1.0 V –100 mA Max 12.5 V VCC + 1.0 V +100 mA TSOP PIN CAPACITANCE Parameter Symbol CIN COUT CIN2 Parameter Description Input Capacitance Output Capacitance Control Pin Capacitance Test Setup VIN = 0 VOUT = 0 VIN = 0 Typ 6 8.5 7.5 Max 7.5 12 9 Unit pF pF pF Notes: 1. Sampled, not 100% tested. 2. Test conditions TA = 25°C, f = 1.0 MHz. DATA RETENTION Parameter Minimum Pattern Data Retention Time Test Conditions 150°C 125°C Min 10 20 Unit Years Years 21525D6 October 12, 2006 Am29LV081B 35 DATA SHEET PHYSICAL DIMENSIONS* TS 040—40-Pin Standard TSOP Dwg rev AA; 10/99 * For reference only. BSC is an ANSI standard for Basic Space Centering. 36 Am29LV081B 21525D6 October 12, 2006 DATA SHEET REVISION SUMMARY Revision A (December 1997) First release. Revision D (November 19, 1999) AC Characteristics—Figure 15. Program Operations Timing and Figure 16. Chip/Sector Erase Operations Deleted tGHWL and changed OE# waveform to start at high. Physical Dimensions Replaced figures with more detailed illustrations. Corrected “TSR048—48-Pin Reverse TSOP” to “TSR040—40-Pin Reverse TSOP”. Revision B (July 1998) Expanded data sheet from Advanced Information to Preliminary version. Distinctive Characteristics Changed “Manufactured on 0.35 µm process technology” to “Manufactured on 0.32 µm process technology”. General Description Second paragraph: Changed “This device is manufactured using AMD’s 0.35 µm process technology” to “This device is manufactured using AMD’s 0.32 µm process technology”. Revision D+1 (November 8, 2000) Global Deleted burn-in option from Ordering Information section. Added table of contents. Revision C (January 1999) Distinctive Characteristics Added the following bullet: 20-year data retention at 125°C. Ordering Information Valid Combinations: Replaced Am29LV081B-100 with Am29LV081B-90. DC Characteristics—CMOS Compatible ICC1, ICC2, ICC3, ICC4, ICC5: Added Note 2 “Maximum ICC specifications are tested with VCC = VCCmax”. Revision D+2 (September 4, 2003) Ordering Information Added Pb-free compliant package and Pb-free package to industrial temperature ordering options. Revision D+3 (June 4, 2004) Ordering Information Added Pb-free OPNs. Revision D+4 (January 4, 2006) Deleted TSR 40-pin Reverse TSOP option. Revision C+1 (May 17, 1999) Global In title of data sheet and in ordering information section, changed “sector erase” to “uniform sector.” Revision D5 (September 12, 2006) Erase and Program Operations table Changed tBUSY to a maximum specification. Revision D6 (October 12, 2006) Global Added notice on product availability. 21525D6 October 12, 2006 Am29LV081B 37 DATA SHEET Colophon The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite). Please note that Spansion will not be liable to you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products. Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law of Japan, the US Export Administration Regulations or the applicable laws of any other country, the prior authorization by the respective government entity will be required for export of those products Trademarks Copyright © 1997–2005 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD logo, and combinations thereof are registered trademarks of Advanced Micro Devices, Inc. ExpressFlash is a trademark of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. Copyright © 2006 Spansion Inc. All Rights Reserved. Spansion, the Spansion logo, MirrorBit, ORNAND, HD-SIM, and combinations thereof are trademarks of Spansion Inc. Other names are for informational purposes only and may be trademarks of their respective owners. 38 Am29LV081B 21525D6 October 12, 2006