W25Q40BVSNIG WINBOND [Winbond], W25Q40BVSNIG Datasheet - Page 53
W25Q40BVSNIG
Manufacturer Part Number
W25Q40BVSNIG
Description
4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
Manufacturer
WINBOND [Winbond]
Datasheet
1.W25Q40BVSNIG.pdf
(73 pages)
- Current page: 53 of 73
- Download datasheet (3Mb)
W25Q40BV
8.2.35
Read JEDEC ID (9Fh)
For compatibility reasons, the W25Q40BV 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 “9Fh”. 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 33. For memory type and
capacity values refer to Manufacturer and Device Identification table.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30 31
Figure 33. Read JEDEC ID Instruction Sequence
Publication Release Date: July 08, 2010
- 53 -
Preliminary - Revision B
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