GD25Q257D datasheet(16/99 Pages) GIGADEVICE

Part #	GD25Q257D

Description	3.3V Uniform Sector Dual and Quad Serial Flash

PDF	99 Pages

Scroll/Zoom	100%

Manufacturer	GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]

Direct Link	http://www.gigadevice.com/

Logo

16 / 99 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q257D

ADS bit

The Address Status (ADS) bit is a read only bit that indicates the current address mode the device is operating in. The

device is in 3-Byte address mode when ADS=0 (default), and in 4-Byte address mode when ADS=1.

ADP bit

The Address Power-up (ADP) bit is a non-volatile writable bit that determines the initial address mode when the device

is powered on or reset. This bit is only used during the power on or device reset initialization period. When ADP=0(factory

default), the device will power up into 3-Byte address mode, the Extended Address Register must be used to access memory

regions beyond 128Mb. When ADP=1, the device will power up into 4-Byte address mode directly.

Power Up

Device Initialization

& Status Register Refresh

(Non-Volatile Cells)

4-Byte Address

Standard SPI

Dual SPI

Quad SPI

3-Byte Address

Standard SPI

Dual SPI

Quad SPI

Enable 4-Byte (B7H)

Disable 4-Byte (E9H)

ADP bit value

ADP = 0

ADP = 1

GD25Q257D Datasheet(PDF) 16 Page - GigaDevice Semiconductor (Beijing) Inc.