IS25LE01G-RILA3-TY datasheet(122/186 Pages) ISSI

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IS25LE01G

IS25WE01G

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

122

Rev. A6

01/14/2025

8.40 INFORMATION ROW PROGRAM OPERATION (IRP, 62h)

The Information Row Program (IRP) instruction allows up to 256 bytes of data to be programmed into the memory

in a single operation. Before the execution of IRP instruction, the Write Enable Latch (WEL) must be enabled

through a Write Enable (WREN) instruction.

The IRP instruction code, three address bytes and program data (1 to 256 bytes) should be sequentially input.

Three address bytes has to be input as specified in the Table 8.10 Information Row Valid Address Range. Program

operation will start once the CE# goes high, otherwise the IRP instruction will not be executed. The internal control

logic automatically handles the programming voltages and timing. The progress or completion of the program

operation can be determined by reading the WIP bit. If the WIP bit is “1”, the program operation is still in progress.

If WIP bi

t 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 data 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 corresponding Information Row array which is one of

IR0~3. When ECC is ON, ECC protection applied on each 64-bit boundary, so the device only allows a single

programming operation to each 8-byte boundary between erase operations. Incremental programming is not

allowed and ignored.

Figure 8.80 IRP (Information Row Program) Sequence

Instruction = 62h

CE #

SCK

3-byte Address

High Impedance

...

Data In 1

Data In 256

...

Mode 3

Mode 0

...

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