AT25SL321 datasheet(55/82 Pages) DIALOG

Il numero della parte	AT25SL321

Spiegazioni elettronici	32-Mbit, 1.7 V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support

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AT25SL321

DS-25SL321–112H–2020-10

8.34 Set Read Parameters (C0h)

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

frequency or minimum data access latency, the Set Read Parameters (C0h) instruction can be used to configure

the number of dummy clocks for the Fast Read (0Bh), Fast Read Quad I/O (EBh), and Burst Read with Wrap

(0Ch) instructions, and also 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. See the corresponding instruction. The

encoding for the number of dummy clocks and wrap length are shown in the following tables. The default ‘Wrap

Length’ after a power up or a Reset instruction is 8 bytes, the default number of dummy clocks is 4.

Figure 8-55. Set Read Parameters instruction (QPI Mode)

Table 8-7.

Dummy Clock Encoding

P5, P4

Dummy

Clocks

Maximum

Read Frequency

80 MHz

104 MHz

Table 8-8.

Wrap Length Encoding

P1, P0

Wrap Length

8-bytes

16-bytes

32-bytes

64-bytes

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