GD25LQ256C Datasheet, PDF (24/68 Pages) ELM Electronics – 256M-bit Serial Flash

GD25LQ256CWIGx 1.8V Uniform Sector Dual and Quad Serial Flash
Fast Read (0BH) in QPI mode
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The Fast Read command is also supported in QPI mode. In QPI mode, the number of dummy clocks is
configured by the “Set Read Parameters (C0H)” command to accommodate a wide range application with
different needs for either maximum Fast Read frequency or minimum data access latency. Depending on the
Read Parameter Bits P[5:4] setting, the number of dummy clocks can be configured as either 4/6/8/8.
Figure 10a. Read Data Bytes at Higher Speed Sequence Diagram (QPI)
CS#
SCLK
IO₀
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Command
0BH _{A23-16 A15-8 A7-0} ^Dummy*
IOs switch from
Input to output
20 16 12 8 4 0 4 0 4 0 4 0 4
IO₁
21 17 13 9 5 1 5 1 5 1 5 1 5
IO₂
22 18 14 10 6 2 6 2 6 2 6 2 6
IO₃
23 19 15 11 7 3 7 3 7 3 7 3 7
Byte1 Byte2
*"Set Read Parameters" Command (C0H)
can set the number of dummy clocks
Note: The device default is in 24-bit address mode. For 4-byte mode, the address length becomes 32-bit.
68 - 24
Rev.1.0