GD25Q21 datasheet(13/49 Pages) ELM

13 / 49 page

Rev.1.1

49 -

http://www.elm-tech.com

GD25Q21BxIGx Uniform Sector Dual and Quad Serial Flash

Table of ID Definitions:

GD25Q21B

Operation Code

M7-M0

ID15-ID8

ID7-ID0

9FH

90H

ABH

(7) Fast Word Read Quad I/O Data

IO0 = (x, x, D4, D0,…)

IO1 = (x, x, D5, D1,…)

IO2 = (x, x, D6, D2,…)

IO3 = (x, x, D7, D3,…)

(8) Fast Word Read Quad I/O Data: the lowest address bit must be 0.

(9) Security Registers Address:

Security Register1: A23-A16=00H, A15-A9=0001000b, A8-A0= Byte Address;

Security Register2: A23-A16=00H, A15-A9=0010000b, A8-A0= Byte Address;

Security Register3: A23-A16=00H, A15-A9=0011000b, A8-A0= Byte Address.

(10) Dummy bits and Wrap Bits

IO0 = (x, x, x, x, x, x, W4, x)

IO1 = (x, x, x, x, x, x, W5, x)

IO2 = (x, x, x, x, x, x, W6, x)

IO3 = (x, x, x, x, x, x, W7, x)

(11) Address, Continuous Read Mode bits, Dummy bits, Manufacture ID and Device ID

IO0 = (A20, A16, A12, A8, A4, A0, M4, M0, x, x, x, x, MID4, MID0, DID4, DID0, …)

IO1 = (A21, A17, A13, A9, A5, A1, M5, M1, x, x, x, x, MID5, MID1, DID5, DID1, …)

IO2 = (A22, A18, A14, A10, A6, A2, M6, M2, x, x, x, x, MID6, MID2, DID6, DID2, …)

IO3 = (A23, A19, A15, A11, A7, A3, M7, M3, x, x, x, x, MID7, MID3, DID7, DID3, …)

GD25Q21 数据表(PDF) 13 Page - ELM Electronics