GD25S512MDBJS datasheet(10/87 Pages) GIGADEVICE

10 / 87 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25S512MD

DEVICE OPERATION

4.1. Stacked Die Operations

Once the device is power on, Die #0 will be active and have control of SPI bus. “Software Die Select (C2H)” instruction

followed by the 8-bit Die ID can be used to select the active die. The active die is available to accept any instruction issued

by the controller and perform specific operations. The inactive/idle die does not accept any other instruction except the

“Software Die Select (C2H)” and “Software Reset (66H+99H)”. However, the inactive/idle die can still perform internal

Program/Erase

operation which was initiated when the die was active. Therefore, “Read (on Active die) while Program/Erase

(on Idle die)” and “Multi–die Program/Erase (both Active & Idle dies)” concurrent operations are feasible in the stack die

configuration. “Software Die Select (C2H)” instruction will only change the active / idle status of the stacked dies, and it will

not interrupt any on-going Program/Erase operations.

“0”

“1”

B7H

E9H

Die #1

4-Byte

Address

3-Byte

Address

SPI

Dual SPI

Quad SPI

SPI

Dual SPI

Quad SPI

ID = #1

ADP=?

“0”

“1”

B7H

E9H

Die #0

4-Byte

Address

3-Byte

Address

SPI

Dual SPI

Quad SPI

SPI

Dual SPI

Quad SPI

ADP=?

(default active after power is up)

ID = #0

Software

Die Select (C2H)

Device Initialization

& Status Register Refresh

(Non-Volatile Cells)

Power Up

Note: ADP bit in the Status Register is only used to determine 3-Byte or 4-Byte address modes during

power up. Changing ADP bit value will not switch the address modes during normal operation.

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