ACE25QC160GLDPTH datasheet(61/73 Pages) ACE

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ACE25QC160G

16M BIT SPI NOR FLASH

VER 1.2

Set Read Parameters (C0H)

In QPI mode, to accommodate a wide range of applications with different needs for either maximum

read

frequency

minimum

data

access

latency,

“Set

Read

Parameters

(C0h)” instruction can be

used to configure the number of dummy clocks for “Fast Read (0Bh)”, “Fast Read Quad I/O (EBh)” & “Burst

Read with Wrap (0Ch)” instructions, and to configure the number of bytes of “Wrap Length” for the “Burst

Read with Wrap (0Ch)” instruction.

In Standard SPI mode, the “Set Read Parameters (C0h)” instruction is not accepted. The dummy clocks for

various Fast Read instructions in Standard/Dual/Quad SPI mode are fixed, please refer to the Instruction

Table 2 for details. The “Wrap Length” is set by W5-4 bit in the “Set Burst with Wrap (77h)” instruction. This

setting will remain unchanged when the device is switched from Standard SPI mode to QPI mode.

The default “Wrap Length” after a power up or a Reset instruction is 8 bytes, the default number of dummy

clocks is 2. The number of dummy clocks is only programmable for “Fast Read (0Bh)”, “Fast Read Quad

I/O (EBh)” & “Burst Read with Wrap (0Ch)” instructions in the QPI mode. Whenever the device is switched

from SPI mode to QPI mode, the number of dummy clocks and “Wrap Length” should be set again, prior to

any 0Bh, EBh or 0Ch instructions.

DUMMY

CLOCKS

MAXIMUM

READ FREQ.

MAXIMUM

READ FREQ.

(A[1:0]=0,0)

55MHz

80MHz

55MHz

80MHz

108MHz

WRAP LENGTH

8-byte

Figure41. Set Read Parameters Instruction (QPI Mode only)

ACE25QC160GLDPTH Datasheet(PDF) 61 Page - ACE Technology Co., LTD.

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