W25X20CLUXIG-TR Datasheet, PDF (32/50 Pages) Winbond – 2M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

W25X20CL
8.2.21 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 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 22. The Device ID values for the W25X20CL are listed in Manufacturer and Device Identification
table. The Manufacturer and Device IDs can be read continuously, alternating from one to the other.
The instruction is completed by driving /CS high.
/CS
CLK
DI
(IO₀)
DO
(IO₁)
/CS
CLK
Mode 3
Mode 0
0 1 2 3 4 5 6 7 8 9 10
28 29 30 31
Instruction (90h)
Address (000000h)
23 22 21
*
High Impedance
3210
* ^{= MSB}
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
Mode 3
Mode 0
DI
(IO₀)
0
DO
(IO₁)
Manufacturer ID (EFh)
76543210
*
Device ID
Figure 22. Read Manufacturer / Device ID Diagram
- 32 -
Publication Release Date: August 06, 2015
Revision F