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Program BUFFER WRITE: Data can be shifted in from the Sl pin into the data buffer. To load data into the buffer, an 8-bit opcode of 84H is followed by 15 don't care bits and nine address bits (BFA8-BFAO). The nine address bits specify the first byte in the buer to be written. The data is entered following the address bits. If the end of the data buffer is reached, the device will wrap around back to the beginning of the buffer. Data will continue to be loaded into the buffer until a low to high transition is detected on the CS pin. BUFFER TO MAIN MEMORY PAGE PROGRAM WITH BUILT-IN ERASE: Data written into the buffer can be pro- grammed into the main memory. An 8-bit opcode of 83H is followed by the six reserved bits, nine address bits (PA8- PAO) that specify the page in the main memory to be writ- ten, and nine additional don't care bits. When a low to high transition occurs on the CS pin, the part will first erase the selected page in main memory to all ls and then program the data stored in the buffer into the specified page in the main memory. Both the erase and the programming of the