W25X40CL Datasheet, PDF(36/53 Page) Winbond – 2.5/3/3.3 V 4M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

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W25X40CL Datasheet, PDF (36/53 Pages) Winbond – 2.5/3/3.3 V 4M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

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W25X40CL

8.2.24 JEDEC ID (9Fh)

For compatibility reasons, the W25X40CL provides several instructions to electronically determine the

identity of the device. The Read JEDEC ID instruction is compatible with the JEDEC standard for SPI

compatible serial memories that was adopted in 2003.

The instruction is initiated by driving the /CS pin low and shifting the instruction code â9Fhâ. The

JEDEC assigned Manufacturer ID byte for Winbond (EFh) and two Device ID bytes, Memory Type

(ID15-ID8) and Capacity (ID7-ID0) are then shifted out on the falling edge of CLK with most significant

bit (MSB) first as shown in figure 25. For memory type and capacity values refer to Manufacturer and

Device Identification table.

Figure 25. Read JEDEC ID

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Publication Release Date: October 15, 2012

Revision E

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