W25X32A datasheet(29/45 Pages) WINBOND

Part #	W25X32A

Description	32M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W25X32A

Publication Release Date: August 7, 2009

- 29 -

Preliminary - Revision B

10.2.16 Read Manufacturer / Device ID (90h)

The Read Manufacturer/Device ID instruction is an alternative to the Release from Power-down / Device

ID instruction that provides both the JEDEC assigned manufacturer ID and the specific device ID.

The Read Manufacturer/Device ID instruction is very similar to the Release from Power-down / Device ID

instruction. The instruction is initiated by driving the /CS pin low and shifting the instruction code “90h”

followed by a 24-bit address (A23-A0) of 000000h. After which, the Manufacturer ID for Winbond (EFh)

and the Device ID are shifted out on the falling edge of CLK with most significant bit (MSB) first as shown

in figure 18. The Device ID value for the W25X32A is listed in Manufacturer and Device Identification

table. If the 24-bit address is initially set to 000001h the Device ID will be read first and then followed by

the Manufacturer ID. The Manufacturer and Device IDs can be read continuously, alternating from one to

the other. The instruction is completed by driving /CS high.

Figure 18. Read Manufacturer / Device ID Diagram

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