BY25Q128AS datasheet(21/73 Pages) LEIDITECH

21 / 73 page

July 2020

Rev 1.5

21 / 73

Instructions Description

BY25Q128AS

Manufacturer/

Device ID

90H

dummy

00H

(MID7-MID0)

(ID7-ID0)

continuous

Manufacturer/

Device ID by Dual

I/O

92H

A23-A8

A7-A0,

dummy

(MID7-

MID0),(DID7

-DID0)

continuous

Manufacturer/

Device ID by Quad

I/O

94H

A23-A0,

dummy

dummy(10)

(MID7-MID0)

(DID7-DID0)

continuous

JEDEC ID

9FH

MID7-

MID0

ID15-ID8

ID7-ID0

continuous

Read Serial Flash

Discoverable

Parameter

5AH

A23-A16

A15-A8

A7-A0

Dummy

D7-D0

continuous

Erase Security

Registers(8)

44H

A23-A16

A15-A8

A7-A0

Program Security

Registers(8)

42H

A23-A16

A15-A8

A7-A0

(D7-D0)

continuous

Read Security

Registers(8)

48H

A23-A16

A15-A8

A7-A0

dummy

(D7-D0)

continuous

Notes:

1. Dual Output data

IO0 = (D6, D4, D2, D0)

IO1 = (D7, D5, D3, D1)

2. Dual Input Address

IO0 = A22, A20, A18, A16, A14, A12, A10, A8, A6, A4, A2, A0, M6, M4, M2, M0

IO1 = A23, A21, A19, A17, A15, A13, A11, A9, A7, A5, A3, A1, M7, M5, M3,M1

3. Quad Output Data

IO0 = (D4, D0,…..)

IO1 = (D5, D1,…..)

IO2 = (D6, D2,…..)

IO3 = (D7, D3,…..)

4. Quad Input Address

IO0 = A20, A16, A12, A8, A4, A0, M4, M0

IO1 = A21, A17, A13, A9, A5, A1, M5, M1

IO2 = A22, A18, A14, A10, A6, A2, M6, M2

IO3 = A23, A19, A15, A11, A7, A3, M7, M3

5. Fast Read Quad I/O Data

IO0 = (x, x, x, x, D4, D0,…)

IO1 = (x, x, x, x, D5, D1,…)

IO2 = (x, x, x, x, D6, D2,…)

IO3 = (x, x, x, x, D7, D3,…)

6. 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,…)

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

8. Security Registers Address:

Security Register1: A23-A16=00H, A15-A8=00010000b, A7-A0= Byte Address;

Security Register2: A23-A16=00H, A15-A8=00100000b, A7-A0= Byte Address;

Security Register3: A23-A16=00H, A15-A8=00110000b, A7-A0= Byte Address;

9. Dummy bits and Wraps 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, x,x)

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