Description
The ACE25C400G (4M-bit) Serial flash supports the standard Serial Peripheral Interface (SPI), and supports the Dual/Quad SPI: Serial Clock, Chip Select, Serial Data I/O0 (SI),I/O1 (SO), I/O2 (WP#), and I/O3 (HOLD#). The Dual I/O data is transferred with speed of 240Mbits/s and the Quad I/O & Quad output data is transferred with speed of 432Mbits/s.

FEATUREs
● 4M-bit Serial Flash
   -512K-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
   -108MHz for fast read with load
   -Dual I/O Data transfer up to 216Mbits/s
   -Quad I/O Data transfer up to 432Mbits/s
● Software/Hardware Write Protection
   -Write protect all/portion of memory via software
   -Enable/Disable protection with WP# Pin
   -Top or Bottom, Sector or Block selection
● Minimum 100,000 Program/Erase Cycles
● Program/Erase Speed
   -Page Program time: 0.7ms typical
   -Sector Erase time: 100ms typical
   -Block Erase time: 0.3/0.5s typical
   -Chip Erase time: 4s typical
● Flexible Architecture
   -Sector of 4K-byte
   -Block of 32/64k-byte
● Low Power Consumption
   -20mA maximum active current
   -5uA maximum power down current
● Advanced security Features(1)
   -3*256-Byte Security Registers With OTP Lock
● Voltage, Temperature Range
   -Full voltage range: 2.7~3.6V
   -40℃ to 85℃ operating range