IS25LP256D-RJLE-TY datasheet(107/179 Pages) ISSI

107 / 179 page

IS25LP256D

IS25WP256D

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

107

Rev A15

08/05/2024

8.31 READ PRODUCT IDENTIFICATION (RDID, ABh)

The Release from Power-down/Read Device ID instruction is a multi-purpose instruction. It can support both SPI

and QPI modes. The Read Product Identification (RDID) instruction is for reading out the old style of 8-bit Electronic

Signature, whose values are shown as the table of Product Identification.

The RDID instruction code is followed by three dummy bytes, each bit being latched-in on SI during the rising SCK

edge. Then the Device ID is shifted out on SO with the MSB first, each bit been shifted out during the falling edge

of SCK. The RDID instruction is ended by driving CE# high. The Device ID (ID7-ID0) outputs repeatedly if additional

clock cycles are continuously sent to SCK while CE# is at low.

Table 8.8 Product Identification

Manufacturer ID

(MF7-MF0)

ISSI Serial Flash

9Dh

Instruction

ABh

90h

9Fh

Part Number

Device ID (ID7-ID0)

Memory Type + Capacity

(ID15-ID0)

IS25LP256D

18h

6019h

IS25WP256D

18h

7019h

Figure 8.69 Read Product Identification Sequence

Device ID

(ID7-ID0)

Data Out

...

Instruction = ABh

CE #

SCK

...

Mode 3

Mode 0

3 Dummy Bytes

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