W25Q20BW_13 Datasheet, PDF (20/72 Pages) Winbond – 1.8V 2M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI

W25Q20BW
8.2.4 Instruction Set Table 3 (ID, Security Instructions)
INSTRUCTION
NAME
BYTE 1
(CODE)
BYTE 2
BYTE 3
BYTE 4
BYTE 5 BYTE 6
Release Power down/
Device ID
Manufacturer/
Device ID⁽²⁾
Manufacturer/Device ID
by Dual I/O
Manufacture/Device ID
by Quad I/O
JEDEC ID
ABh
dummy
dummy
dummy
(ID7-ID0)⁽¹⁾
90h
dummy
dummy
00h
(MF7-MF0) (ID7-ID0)
92h
A23-A8
A7-A0, M[7:0]
(MF[7:0], ID[7:0])
94h A23-A0, M[7:0] xxxx, (MF[7:0], ID[7:0]) (MF[7:0], ID[7:0], …)
(MF7-MF0)
9Fh
Manufacturer
(ID15-ID8)
Memory Type
(ID7-ID0)
Capacity
Read Unique ID
4Bh
dummy
dummy
dummy
dummy (ID63-ID0)
Erase
Security Registers⁽³⁾
44h
A23–A16
A15–A8
A7–A0
Program
Security Registers⁽³⁾
42h
A23–A16
A15–A8
A7–A0
D7-D0
D7-D0
Read
Security Registers⁽³⁾
48h
A23–A16
A15–A8
A7–A0
dummy
(D7-0)
Notes:
1. The Device ID will repeat continuously until /CS terminates the instruction.
2. See Manufacturer and Device Identification table for Device ID information.
3. Security Register Address:
Security Register 0:
Security Register 1:
Security Register 2:
Security Register 3:
A23-16 = 00h;
A23-16 = 00h;
A23-16 = 00h;
A23-16 = 00h;
A15-8 = 00h;
A15-8 = 10h;
A15-8 = 20h;
A15-8 = 30h;
A7-0 = byte address
A7-0 = byte address
A7-0 = byte address
A7-0 = byte address
Please note that Security Register 0 is Reserved by Winbond for future use. It is recommended to use Security
registers 1- 3 before using register 0.
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