參數(shù)資料
型號(hào)： W25Q32DWZPIP
廠商： WINBOND ELECTRONICS CORP
元件分類： PROM
英文描述： 256K X 16 SPI BUS SERIAL EEPROM, 7.5 ns, PDSO8
封裝： 6 X 5 MM, GREEN, WSON-8
文件頁(yè)數(shù)： 60/82頁(yè)
文件大小： 1155K
代理商： W25Q32DWZPIP
W25Q32DW
Publication Release Date: January 18, 2011
- 63 -
Preliminary - Revision C
10.2.38 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 Table 10.2.2-10.2.4 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 should be set again, prior
to any 0Bh, EBh or 0Ch instructions.
P5 – P4
DUMMY
CLOCKS
MAXIMUM READ
FREQ.
MAXIMUM
READ FREQ.
(A[1:0]=0,0)
P1 – P0
WRAP
LENGTH
0
2
30MHz
0
8-byte
0
1
4
50MHz
80MHz
0
1
16-byte
1
0
6
80MHz
104MHz
1
0
32-byte
1
8
104MHz
1
64-byte
/CS
CLK
Mode 0
Mode 3
0
1
IO
0
IO
1
IO
2
IO
3
C0h
2
3
Read
Parameters
P4
P0
P5
P1
P6
P2
P7
P3
Instruction
Mode 0
Mode 3
Figure 37. Set Read Parameters Instruction (QPI Mode only)
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