GD25Q20 - Dual and Quad SPI Flash
The GD25Q40/20/10/512 (4M-bit) SPI flash supports the standard Serial Peripheral Interface (SPI), and a high performance Dual/Quad output as well as Dual/Quad SPI: Serial Clock, Chip Select, Serial Data I/O0 (SI), I/O1 (SO), I/O2 (WP#), and I/O3 (HOLD#).
SPI clock frequencies of up to 120MHz are
GD25Q20 Features
* 4M/2M/1M/512K-bit Serial Flash -512/256/128/64K-byte -256 bytes per programmable page
* Standard, Dual, Quad SPI -Standard SPI: SCLK, CS#, SI, SO, WP#, HOLD# -Dual SPI:SCLK, CS#, IO0, IO1, WP#, HOLD# -Quad SPI:SCLK, CS#, IO0, IO1, IO2, IO3
* High Speed Clock Frequency -120MHz for fast
