5.49 Block Erase_64KB (BE_64KB)

The Block Erase_64KB (D8H) instruction clears all bits within the selected 64-KB block to 1. If the command targets a protected memory region, the erase operation is ignored. Before starting any write operation, the WREN command must be executed. The CE# signal must remain active-low throughout the entire command sequence. To execute a Block Erase_64KB operation, the host drives CE# low, issues the Block Erase command (D8H), transmits three address bytes, and then drives CE# high. Address bits [A_MS–A₁₆], where A_MS denotes the Most Significant Address, specify the target block address, while the remaining address bits may be set to either V_IL or V_IH. Completion of the internally timed Block Erase_64KB operation can be confirmed by polling the Busy bit in the status register or by waiting for the specified T_BE64KB interval. Refer to Figure 5-42 and Figure 5-43 for the Block Erase command sequences.