M29F400BT, M29F400BB are 4Mbit (512Kb x 8 or 256Kb x 16, Boot Block) single supply flash memory, support 5V±10% voltage, reading, programming, erasing time are 45ns, 8µs, 20 years data retention time, product features include 11 storage blocks, embedded byte/word programming algorithm, embedded multi-block/chip erase algorithm, status register polling and toggle bit, ready/busy output pin, erase suspend and resume mode, unlock bypass programming command, temporary block unprotected mode, low power consumption
