IS25LP064A-RGLA1 datasheet(38/99 Pages) ISSI

38 / 99 page

IS25LP064A/032A

Integrated Silicon Solution, Inc.- www.issi.com

Rev. A

11/06/2015

8.8 PAGE PROGRAM OPERATION (PP, 02h)

The Page Program (PP) instruction allows up to 256 bytes data to be programmed into memory in a single

operation. The destination of the memory to be programmed must be outside the protected memory area set by

the Block Protection (BP3, BP2, BP1, BP0) bits. A PP instruction which attempts to program into a page that is

write-protected will be ignored. Before the execution of PP instruction, the Write Enable Latch (WEL) must be

enabled through a Write Enable (WREN) instruction.

The PP instruction code, three address bytes and program data (1 to 256 bytes) are input via the Sl line.

Program operation will start immediately after the CE# is brought high, otherwise the PP instruction will not be

executed. The internal control logic automatically handles the programming voltages and timing. During a

program operation, all instructions will be ignored except the RDSR instruction. The progress or completion of

the program operation can be determined by reading the WIP bit in Status Register via a RDSR instruction. If

the WIP bit is “1”, the program operation is still in progress. If WIP bit is “0”, the program operation has

completed.

If more than 256 bytes data are sent to a device, the address counter rolls over within the same page, the

previously latched data are discarded, and the last 256 bytes are kept to be programmed into the page. The

starting byte can be anywhere within the page. When the end of the page is reached, the address will wrap

around to the beginning of the same page. If the data to be programmed are less than a full page, the data of all

other bytes on the same page will remain unchanged.

Note:

A program operation can alter “1”s into “0”s, but an erase operation is required to change “0”s back to “1”s.

A byte cannot be reprogrammed without first erasing the whole sector or block.

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