ACE25QC160GLDPTH datasheet(8/73 Pages) ACE

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ACE25QC160G

16M BIT SPI NOR FLASH

VER 1.2

SPI Operation

Standard SPI Instructions

The ACE25QC160G 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 Instructions

The ACE25QC160G 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) instructions. These instructions

allow data to be transferred to or from the device at two times the rate of the standard SPI. When using the

Dual SPI instruction the SI and SO pins become bidirectional I/O pins: IO0 and IO1.

Quad SPI Instructions

The ACE25QC160G supports Quad SPI operation when using the “Quad Output Fast Read”(6BH), “Quad

I/O Fast Read” (EBH) ,”Quad I/O word Fast Read”(E7H),”Read Manufacture ID/Device ID Quad I/O”(94H)

and “Quad Page Program”(32H) instructions. These instructions allow data to be transferred to or from the

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

become bidirectional I/O pins: IO0 and IO1, and /WP and

/HOLD pins become IO2 and IO3. Quad SPI instructions require the non-volatile Quad Enable bit (QE) in

Status Register to be set.

QPI Instructions

The ACE25QC160G supports Quad Peripheral Interface (QPI) operations only when the device is switched

from Standard/Dual/Quad SPI mode to QPI mode using the “Enter QPI (38h)” instruction. The typical SPI

protocol requires that the byte-long instruction code being shifted into the device only via DI pin in eight

serial clocks. The QPI mode utilizes all four IO pins to input the instruction code, thus only two serial clocks

are required. This can significantly reduce the SPI instruction overhead and improve system performance

in an XIP environment. Standard/Dual/Quad SPI mode and QPI mode are exclusive. Only one mode can

be active at any given time. “Enter QPI (38h)” and “Exit QPI (FFh)” instructions are used to switch between

these two modes. Upon power-up or after a software reset using “Enable Reset (66h)”and “Reset (99h)”

instruction, the default state of the device is Standard/Dual/Quad SPI mode. To enable QPI mode, the

non-volatile Quad Enable bit (QE) in Status Register-2 is required to be setto 1. When using QPI

instructions, the DI and DO pins become bidirectional IO0 and IO1, and the /WP and /HOLD pins become

IO2 and IO3 respectively.

ACE25QC160GLDPTH Datasheet(PDF) 8 Page - ACE Technology Co., LTD.