ADVANCE INFORMATION Am29LV020B 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Uniform Sector 32-Pin Flash Memory DISTINCTIVE CHARACTERISTICS ■ Single power supply operation — Full voltage range: 2.7 to 3.6 volt read and write operations for battery-powered applications — Regulated voltage range: 3.0 to 3.6 volt read and write operations and for compatibility with high performance 3.3 volt microprocessors ■ Manufactured on 0.35 µm process technology ■ High performance — Full voltage range: access times as fast as 70 ns — Regulated voltage range: access times as fast as 55 ns ■ Ultra low power consumption — Automatic sleep mode: 1 µA (typical values at 5 MHz) — Standby mode: 1 µA — Read mode: 7 mA — Program/erase mode: 15 mA ■ Flexible sector architecture — Four 64 Kbyte sectors — Any combination of sectors can be erased; supports full chip erase — Sector Protection features: Hardware method of locking a sector to prevent any program or erase operations within that sector ■ Unlock Bypass Program Command — Reduces overall programming time when issuing multiple program command sequences ■ Embedded Algorithms — Embedded Erase algorithms automatically preprogram and erase the entire chip or any combination of designated sectors — Embedded Program algorithms automatically writes and verifies data at specified addresses ■ Minimum 1,000,000 write/erase cycles guaranteed ■ Package option — 32-pin PLCC — 32-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 cycle completion ■ Erase Suspend/Resume — Supports reading data from or programming data to a sector not being erased Sectors can be locked via programming equipment This document contains information on a product under development at Advanced Micro Devices. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. 2/9/98 Publication# 21351 Rev: A Amendment/+1 Issue Date: February 1998 Refer to AMD’s Website (www.amd.com) for the latest information. A D V A N C E I N F O R M A T I O N GENERAL DESCRIPTION The Am29LV020B is a single power supply, 2 Mbit, 3.0 Volt-only Flash memory device organized as 262,144 bytes. The data appears on DQ0-DQ7. The device is available in 32-pin PLCC and 32-pin TSOP packages. All read, erase, and program operations are accomplished using only a single power supply. The device can also be programmed in standard EPROM programmers. The device offers access times of 55, 70, 90, and 120 ns allowing high speed microprocessors to operate without wait states. To eliminate bus contention, the device has separate control pins—chip enable (CE#), write enable (WE#), and output enable (OE#)—to control normal read and write operations. The device requires only a single power supply (2.7 V–3.6 V) 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 Embedded 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) 2 before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper cell margin. The host system can detect whether a program or erase operation is complete 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 is achieved 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 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. Am29LV020B 2/9/98 A D V A N C E I N F O R M A T I O N PRODUCT SELECTOR GUIDE Family Part Number Speed Options Am29LV020B Regulated Voltage Range: VCC =3.0–3.6 V -55R Full Voltage Range: VCC = 2.7–3.6 V -70 -90 -120 Max access time, ns (tACC) 55 70 90 120 Max CE# access time, ns (tCE) 55 70 90 120 Max OE# access time, ns (tOE) 30 30 35 35 Note: See “AC Characteristics” for full specifications. BLOCK DIAGRAM DQ0–DQ7 VCC Sector Switches VSS Erase Voltage Generator WE# Input/Output Buffers State Control Command Register PGM Voltage Generator Chip Enable Output Enable Logic CE# OE# VCC Detector Address Latch STB Timer A0–A17 2/9/98 Am29LV020B STB Data Latch Y-Decoder Y-Gating X-Decoder Cell Matrix 3 A D V A N C E I N F O R M A T I O N WE# A17 NC VCC A16 A12 A15 CONNECTION DIAGRAMS 4 3 2 1 32 31 30 A7 5 29 A14 A6 6 28 A13 A5 7 27 A8 A4 8 26 A9 A3 9 25 A11 A2 10 24 OE# A1 11 23 A10 A0 12 22 CE# DQ0 13 21 DQ7 DQ6 DQ5 DQ4 VSS DQ3 DQ1 DQ2 14 15 16 17 18 19 20 32-Pin PLCC 21351A-2 4 Am29LV020B 2/9/98 A D V A N C E I N F O R M A T I O N CONNECTION DIAGRAMS A11 A9 A8 A13 A14 A17 WE# VCC 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 OE# A10 CE# DQ7 DQ6 DQ5 DQ4 DQ3 VSS DQ2 DQ1 DQ0 A0 A1 A2 A3 32-pin Standard TSOP OE# A10 CE# DQ7 DQ6 DQ5 DQ4 DQ3 VSS DQ2 DQ1 DQ0 A0 A1 A2 A3 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 A11 A9 A8 A13 A14 A17 WE# VCC NC A16 A15 A12 A7 A6 A5 A4 32-Pin Reverse TSOP 21351A-3 2/9/98 Am29LV020B 5 A D V A N C E I N F O R M A T I O N PIN CONFIGURATION A0–A17 LOGIC SYMBOL = 18 address inputs 18 DQ0–DQ7 = 8 data inputs/outputs A0–A17 CE# = Chip enable OE# = Output enable WE# = Write enable CE# VCC = 3.0 volt-only single power supply (see Product Selector Guide for speed options and voltage supply tolerances) OE# VSS 6 8 DQ0–DQ7 WE# = Device ground Am29LV020B 2/9/98 A D V A N C E I N F O R M A T I O N 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. Am29LV020B T -55R E C OPTIONAL PROCESSING Blank = Standard Processing B = Burn-in (Contact an AMD representative for more information) TEMPERATURE RANGE C = Commercial (0°C to +70°C) I = Industrial (–40°C to +85°C) E = Extended (–55°C to +125°C) PACKAGE TYPE P = 32-Pin Plastic Dual In-Line Package (PD 032) J = 32-Pin Plastic Leaded Chip Carrier (PL 032) E = 32-Pin Thin Small Outline Package (TSOP) Standard Pinout (TS 048) F = 32-Pin Thin Small Outline Package (TSOP) Reverse Pinout (TSR048) SPEED OPTION See Product Selector Guide and Valid Combinations BOOT CODE SECTOR ARCHITECTURE T = Top Sector B = Bottom Sector DEVICE NUMBER/DESCRIPTION Am29LV020B 2 Megabit (256 K x 8-Bit) CMOS Flash Memory 3.0 Volt-only Read, Program, and Erase Valid Combinations Valid Combinations Am29LV020B-55 Am29LV020B-70 Am29LV020B-90 Am29LV020B-120 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. JC, JI, EC, EI, FC, FI JC, JI, JE, EC, EI, EE, FC, FI, FE Trademarks Copyright © 1998 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD logo, and combinations thereof are registered trademarks of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. 2/9/98 Am29LV020B 7