The V29C31004T/V29C31004B is a high speed 524,288 x 8 bit CMOS flash memory. Writing or erasing the device is done with a single 3.3 Volt power supply. The device has separate chip enable CE, write enable WE , and output enable OE controls to eliminate bus contention. The V29C31004T/V29C31004B offers a combination of: Boot Block with Sector Erase/Write Mode. The end of write/erase cycle is detected by DATA Polling of I/O7 or by the Toggle Bit I/O6. The V29C31004T/V29C31004B features a sector erase operation which allows each sector to be erased and reprogrammed without affecting data stored in other sectors. The device also supports full chip erase.