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 x 8 bits) and WORD mode (2,097,152 words x 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.