Am29DL400B

Simultaneous Read/Write operations
    -Host system can program or erase in one bank, 
       then immediately and simultaneously read from  the other bank
    -Zero latency between read and write operations
    -Read-while-erase
    -Read-while-program
Single power supply operation
    -2.7 to 3.6 volt read and write operations for battery-powered applications
Manufactured on 0.35 µm process technology
High performance
    -Access times as fast as 70 ns
Low current consumption (typical values at 5 MHz)
    -7 mA active read current
    -21 mA active read-while-program or read-while-erase current
    -17 mA active program-while-erase-suspended current
    -200 nA in standby mode
    -200 nA in automatic sleep mode
    -Standard t_CE chip enable access time applies to
       transition from automatic sleep mode to active mode
Flexible sector architecture
    -Two 16 Kword, two 8 Kword, four 4 Kword, and six 32 Kword sectors in word mode
    -Two 32 Kbyte, two 16 Kbyte, four 8 Kbyte, and six 64 Kbyte sectors in byte mode
    -Any combination of sectors can be erased
    -Supports full chip erase
Unlock Bypass Program Command
    -Reduces overall programming time when  issuing multiple program command sequences

Sector protection
    -Hardware method of locking a sector to prevent
      any program or erase operation within that sector
    -Sectors can be locked in-system or via programming equipment
    -Temporary Sector Unprotect feature allows code  changes in previously locked sectors
Top or bottom boot block configurations available
Embedded Algorithms
    -Embedded Erase algorithm automatically pre-programs and erases sectors or entire chip
    -Embedded Program algorithm automatically programs and verifies data at specified address
Minimum 1 million program/erase cycles guaranteed per sector
Package options
    -44-pin SO
    -48-pin TSOP
Compatible with JEDEC standards
    -Pinout and software compatible with single-power-supply flash standard
    -Superior inadvertent write protection

 Data# Polling and Toggle Bits
    -Provides a software method of detecting program or erase cycle completion
Ready/Busy# output (RY/BY#)
    -Hardware method for detecting program or erase cycle completion
Erase Suspend/Erase Resume
    -Suspends or resumes erasing sectors to allow reading and programming in other sectors
    -No need to suspend if sector is in the other bank
Hardware reset pin (RESET#)
    -Hardware method of resetting the device to reading array data