IS25LP032 datasheet(56/90 Pages) ISSI

56 / 90 page

IS25LP032/064/128

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

Rev. D

10/03/2014

8.26 READ DEVICE MANUFACTURER AND DEVICE ID OPERATION (RDMDID, 90h)

The Read Product Identification (RDID) instruction allows the user to read the manufacturer and product ID of

devices. Refer to Table 8.3 Product Identification for manufacturer ID and device ID. The RDID instruction code

is followed by two dummy bytes and one byte address (A7~A0), each bit being latched-in on SI during the rising

edge of SCK. If one byte address is initially set as A0 = 0, then the manufacturer ID (9Dh) is shifted out on SO

with the MSB first followed by the device ID7- ID0. Each bit shifted out during the falling edge of SCK. If one

byte address is initially set as A0 = 1, then Device ID7-ID0 will be read first followed by the Manufacture ID

(9Dh). The manufacture and device ID can be read continuously alternating between the two until CE# is driven

high.

Figure 8.44 Read Product Identification by RDMDID READ Sequence

Instruction = 90h

Manufacturer ID

(MF7-MF0)

CE #

SCK

Device ID

(ID7-ID0)

Data Out

...

Mode 3

Mode 0

3 Byte Address

Notes:

1. ADDRESS A0 = 0, will output the 1-byte Manufacture ID (MF7-MF0)

 1-byte device ID (ID7-ID0)

ADDRESS A0 = 1, will output the 1-byte device ID (ID7-ID0)

 1-byte Manufacture ID (MF7-MF0)

2. The Manufacture and Device ID can be read continuously and will alternate from one to the other until CE# pin is pulled high.

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