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GD25LB32D Datasheet(Arkusz danych) 8 Page - GigaDevice Semiconductor (Beijing) Inc.

Numer części GD25LB32D
Szczegółowy opis  1.8V Uniform Sector Dual and Quad Serial Flash
Pobierz  67 Pages
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Producent  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Strona internetowa  http://www.gigadevice.com/
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 8 page
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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LB32D
8
4. DEVICE OPERATION
SPI Mode
Standard SPI
The GD25LB32D 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 GD25LB32D 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 times 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 GD25LB32D supports Quad SPI operation when using the
“Quad Output Fast Read”,” Quad I/O Fast Read”,
“Quad I/O Word Fast Read”, “Quad Page Program” (6BH, EBH, E7H, 32H) 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.
QPI
The GD25LB32D supports Quad Peripheral Interface (QPI) operations only when the device is switched from
Standard/Dual/Quad SPI mode to QPI mode using the
“Enable the QPI (38H)” command. The QPI mode utilizes all four IO
pins to input the command code. Standard/Dual/Quad SPI mode and QPI mode are exclusive. Only one mode can be
active at any given times.
“Enable the QPI (38H)” and “Disable the QPI (FFH)” commands are used to switch between
these two modes. Upon power-up and after software reset
using “”Reset (99H)” command, the default state of the device is
Standard/Dual/Quad SPI mode.




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