A29DL323

The A29DL323 is a flash memory organized of 33,554,432  bits and 71 sectors. Sectors of this memory can be erased  at a low voltage (2.7 to 3.6 V) supplied from a single power  source, or the contents of the entire chip can be erased.  Two  modes of memory organization, BYTE mode  (4,194,304 words × 8 bits) and WORD mode (2,097,152  words × 16 bits), are selectable so that the memory can be  programmed in byte or word units.

The A29DL323 can be read while its contents are being  erased or programmed. The memory cell is divided into two  banks. While sectors in one bank are being erased or  programmed, data can be read from the other bank thanks  to the simultaneous execution architecture. The banks are  8 Mbits and 24 Mbits.

This flash memory A29DL323 comes in two types. The T type has a  boot sector located at the highest address (sector) and the  B type has a boot sector at the lowest address (sector).

Because the A29DL323 enables the boot sector to be  erased, it is ideal for storing a boot program. In addition,  program code that controls the flash memory can be also  stored, and the program code can be programmed or  erased without the need to load it into RAM. Eight small  sectors for storing parameters are provided, each of which  can be erased in 8 Kbytes units.

Once a program or erase command sequence has been  executed, an automatic program or automatic erase  function internally executes program or erase and  verification automatically.

Because the A29DL323 can be electrically erased or  programmed by writing an  instruction, data can be  reprogrammed on-board after the flash memory has been  installed in a system, making it suitable for a wide range of  applications.