GENERAL DESCRIPTION

The Am29LV256M is a 256 Mbit, 3.0 volt single power supply flash memory devices organized as 16,777,216 words or 33,554,432 bytes. The device has a 16-bit wide data bus that can also function as an 8-bit wide data bus by using the BYTE# input. The device can be programmed either in the host system or in standard EPROM programmers.

DISTINCTIVE CHARACTERISTICS

ARCHITECTURAL ADVANTAGES

■ Single power supply operation

— 3 volt read, erase, and program operations

■ VersatileI/OTM control

— Device generates data output voltages and tolerates data input voltages on the CE# and DQ inputs/outputs as determined by the voltage on the VIO pin; operates from 1.65 to 3.6 V

■ Manufactured on 0.23 µm MirrorBit process technology

■ SecSiTM (Secured Silicon) Sector region

— 128-word/256-byte sector for permanent, secure identification through an 8-word/16-byte random Electronic Serial Number, accessible through a command sequence

— May be programmed and locked at the factory or by the customer

■ Flexible sector architecture

— Five hundred twelve 32 Kword (64 Kbyte) sectors

■ Compatibility with JEDEC standards

— Provides pinout and software compatibility for single-power supply flash, and superior inadvertent write protection

■ Minimum 100,000 erase cycle guarantee per sector

■ 20-year data retention at 125°C

PERFORMANCE CHARACTERISTICS

■ High performance

— 100 ns access time

— 30 ns page read times

— 0.5 s typical sector erase time

— 15 µs typical effective write buffer word programming time: 16-word/32-byte write buffer reduces overall programming time for multiple-word updates

— 4-word/8-byte page read buffer

— 16-word/32-byte write buffer

■ Low power consumption (typical values at 3.0 V, 5 MHz)

— 13 mA typical active read current

— 50 mA typical erase/program current

— 1 µA typical standby mode current

■ Package options

— 56-pin TSOP

— 64-ball Fortified BGA

SOFTWARE & HARDWARE FEATURES

■ Software features

— Program Suspend & Resume: read other sectors before programming operation is completed

— Erase Suspend & Resume: read/program other sectors before an erase operation is completed

— Data# polling & toggle bits provide status

— Unlock Bypass Program command reduces overall multiple-word or byte programming time

— CFI (Common Flash Interface) compliant: allows host system to identify and accommodate multiple flash devices

■ Hardware features

— Sector Group Protection: hardware-level method of preventing write operations within a sector group

— Temporary Sector Group Unprotect: VID-level method of changing code in locked sector groups

— WP#/ACC input accelerates programming time (when high voltage is applied) for greater throughput during system production. Protects first or last sector regardless of sector protection settings

— Hardware reset input (RESET#) resets device

— Ready/Busy# output (RY/BY#) detects program or erase cycle completion