GD25LE80CEIG datasheet(8/68 Pages) GIGADEVICE

8 / 68 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE80C

DEVICE OPERATION

SPI Mode

Standard SPI

The GD25LE80C 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 GD25LE80C supports Dual SPI operation when using the

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

BBH) 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 GD25LE80C supports Quad SPI operation when using the

“Quad Output Fast Read” (6BH),” Quad I/O Fast Read”

(EBH) 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, and WP# and

HOLD# pins become IO2 and IO3. Quad SPI commands require the non-volatile Quad Enable bit (QE) in Status Register

to be set.

Hold

The HOLD# signal goes low to stop any serial

communications with the device, but doesn’t stop the operation of write status

The operation of HOLD, need CS# keep low, and starts on falling edge of the HOLD# signal, with SCLK signal being low (if

SCLK is not being low, HOLD operation will not start until SCLK being low). The HOLD condition ends on rising edge of

HOLD# signal with SCLK being low (If SCLK is not being low, HOLD operation will not end until SCLK being low).

The SO is high impedance, both SI

and SCLK don’t care during the HOLD operation, if CS# drives high during HOLD

operation, it will reset the internal logic of the device. To re-start communication with chip, the HOLD# must be at high and

then CS# must be at low.

Figure 1. Hold Condition

HOLD

CS#

SCLK

HOLD#

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