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
(1)
ABh
dummy
dummy
dummy
(ID7-ID0)
Manufacturer/
90h
92h
94h
dummy
A23-A8
dummy
00h
(MF7-MF0)
(ID7-ID0)
(2)
Device ID
Manufacturer/Device ID
by Dual I/O
A7-A0, M[7:0]
(MF[7:0], ID[7:0])
Manufacture/Device ID
by Quad I/O
A23-A0, M[7:0] xxxx, (MF[7:0], ID[7:0]) (MF[7:0], ID[7:0], …)
(MF7-MF0)
(ID15-ID8)
(ID7-ID0)
Capacity
JEDEC ID
9Fh
4Bh
44h
Manufacturer
Memory Type
Read Unique ID
dummy
dummy
A15–A8
dummy
A7–A0
dummy
(ID63-ID0)
Erase
Security Registers(3)
A23–A16
Program
42h
48h
A23–A16
A23–A16
A15–A8
A15–A8
A7–A0
A7–A0
D7-D0
D7-D0
(D7-0)
Security Registers(3)
Read
Security Registers(3)
dummy
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: A23-16 = 00h; A15-8 = 00h; A7-0 = byte address
Security Register 1: A23-16 = 00h; A15-8 = 10h; A7-0 = byte address
Security Register 2: A23-16 = 00h; A15-8 = 20h; A7-0 = byte address
Security Register 3: A23-16 = 00h; A15-8 = 30h; 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.
Publication Release Date: January 25, 2011
- 19 -
Preliminary - Revision B
WINBOND [ WINBOND ]
