GD25B64CSIG datasheet(8/57 Pages) GIGADEVICE

8 / 57 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B64C

4. DEVICE OPERATION

SPI Mode

Standard SPI

The GD25B64C features a serial peripheral interface on 4 signals bus: Serial Clock (SCLK), Chip Select (CS#), Serial

Data Input (SI) and Serial Data Output (SO). Both SPI bus mode 0 and 3 are supported. Input data is latched on the rising

edge of SCLK and data shifts out on the falling edge of SCLK.

Dual SPI

The GD25B64C supports Dual SPI operation when using the

“Dual Output Fast Read” (3BH), “Dual I/O Fast Read”

(BBH)

and “Read Manufacture ID/ Device ID Dual I/O” (92H) commands. These commands allow data to be transferred to

or from the device at twice the rate of the standard SPI. When using the Dual SPI command the SI and SO pins become

bidirectional I/O pins: IO0 and IO1.

Quad SPI

The GD25B64C

supports Quad SPI operation when using the “Quad Output Fast Read”,” Quad I/O Fast Read”,

“Quad I/O Word Fast Read” (6BH, EBH, E7H) commands. These commands allow data to be transferred to or from the

device at four times the rate of the standard SPI. When using the Quad SPI command the SI and SO pins become

bidirectional I/O pins: IO0 and IO1.

GD25B64CSIG Datasheet(PDF) 8 Page - GigaDevice Semiconductor (Beijing) Inc.