5.52 Page Program (PP)
The Page Program (02H) instruction programs up to 256 bytes of data into memory and supports both SPI and QPI protocols. Before starting a Page Program operation, the target page address must be in the erased state (FFH). If the instruction is issued for a protected memory region, the operation is ignored. The Write Enable (WREN) instruction must be executed before issuing the Page Program command.
To execute a Page Program operation, the host drives CE# low, issues the Page Program command (02H) in SPI or QPI mode, transmits three address bytes followed by the data to be programmed, and then drives CE# high. The amount of data programmed must range from 1 to 256 bytes in whole-byte increments. Any partial byte transmitted is ignored. Completion of the internally timed Page Program operation can be verified by polling the Busy bit in Status Register 1 or by waiting for the specified TPP interval. Refer to Figure 5-46 and Figure 5-47 for the Page Program command sequences in SPI and QPI modes.
During a Page Program operation, memory is organized into 256-byte page boundaries. If more than 256 bytes are transmitted, only the last 256 bytes received are programmed. If the starting address is not aligned to a page boundary (A[7:0] are not all zero) and the transmitted data exceeds the remaining space in the page, the excess data wraps around and is programmed at the beginning of the same page.