IS25WP064A-RBLE datasheet(68/111 Pages) ISSI

68 / 111 page

IS25WP064A/032A

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

Rev. 00D

03/01/2016

8.29 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 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 8.5 Product Identification

Manufacturer ID

(MF7-MF0)

ISSI Serial Flash

9Dh

Instruction

ABh

90h

9Fh

Device Density

Device ID (ID7-ID0)

Memory Type + Capacity

(ID15-ID0)

64Mb

16h

7017h

32Mb

15h

7016h

Figure 8.50 Read Product Identification Sequence In SPI Mode

Device ID

(ID7-ID0)

Data Out

...

Instruction = ABh

CE #

SCK

...

Mode 3

Mode 0

3 Dummy Bytes

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