ACE25AA320GFMTH datasheet(44/67 Pages) ACE

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ACE25AA320G

Serial NOR Flash Memory

3.0V Multi I/O with 4KB, 32KB & 64KB Sector/Block Erase

VER 1.2

Set Read Parameters (C0H)

In QPI mode the “Set Read Parameters (C0H)” command can be used to configure the number of dummy

clocks for “Fast Read (0BH)”, “Quad I/O Fast Read (EBH)” and “Burst Read with Wrap (0CH)” command,

and to configure the number of bytes of “Wrap Length” for the “Burst Read with Wrap (0CH)” command.

The “Wrap Length” is set by W5-6 bit in the “Set Burst with Wrap (77H)” command. This setting will

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

P5-P4

Dummy Clocks

Maximum Read Freq.

P1-P0

Wrap Length

0 0

80MHz

0 0

8-byte

0 1

80MHz

0 1

16-byte

1 0

96MHz

1 0

32-byte

1 1

108MHz

1 1

64-byte

Burst Read with Wrap (0CH)

The “Burst Read with Wrap (0CH)” command provides an alternative way to perform the read operation

with “Wrap Around” in QPI mode. This command is similar to the “Fast Read (0BH)” command in QPI

mode, except the addressing of the read operation will “Wrap Around” to the beginning boundary of the

“Wrap Around” once the ending boundary is reached. The “Wrap Length” and the number of dummy

clocks can be configured by the “Set Read Parameters (C0H)” command. When the dummy cycle is

configured to 4, addr[0] input must be 0.

Figure29. Set Read Parameters Command Sequence Diagram

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