AT25QL321 datasheet(48/79 Pages) DIALOG

номер детали	AT25QL321

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

PDF	79 Pages

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AT25QL321

DS-25QL321–131C–5/2017

Figure 7-54. Burst Read with Wrap instruction (QPI Mode, 104MHz)

7.33 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, “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. and for details Table 7.1,

Table 7-3, Table 7-4, and Table 7-5. The “Wrap Length” is set by W6-5 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 4.

Dummy

Clocks

Maximum

Read Freq.

80MHz

104MHz*

P1, P0

Wrap Length

0 0

8-byte

0 1

16-byte

1 0

32-byte

1 1

64-byte

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