5.46 Sector Erase_4Byte (SE)

The Sector Erase_4Byte instruction clears all bits within the selected 4-KB sector to 1. Protected memory regions are not affected by this operation. Before initiating a Sector Erase_4Byte operation, the Write Enable (WREN) instruction must be executed.

To perform a Sector Erase_4Byte operation, the host asserts CE# low and transmits the Sector Erase command (21H) in either SPI mode or QPI mode, followed by four address bytes. The host then drives CE# high to initiate the internal erase operation. Address bits [A_MS:A₁₂], where A_MS represents the Most Significant Address bit, define the sector address (S_AX). The remaining lower address bits can be either V_IL or V_IH. The completion of the internally timed erase operation can be determined by polling the Busy bit in Status Register 1 or by waiting for the specified sector erase time T_SE.