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參數(shù)資料
| 型號(hào)： | W25Q80BWZPIP |
| 廠(chǎng)商： | WINBOND ELECTRONICS CORP |
| 元件分類(lèi)： | PROM |
| 英文描述： | 8M X 1 SPI BUS SERIAL EEPROM, PDSO8 |
| 封裝： | 6 X 5 MM, GREEN , PLASTIC, WSON-8 |
| 文件頁(yè)數(shù)： | 30/71頁(yè) |
| 文件大?。?/td> | 0K |
| 代理商： | W25Q80BWZPIP |
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W25Q80BW
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8.2.18 Set Burst with Wrap (77h)
The Set Burst with Wrap (77h) instruction is used in conjunction with “Fast Read Quad I/O” and “Word
Read Quad I/O” instructions to access a fixed length of 8/16/32/64-byte section within a 256-byte page.
Certain applications can benefit from this feature and improve the overall system code execution
performance.
Similar to a Quad I/O instruction, the Set Burst with Wrap instruction is initiated by driving the /CS pin low
and then shifting the instruction code “77h” followed by 24 dummy bits and 8 “Wrap Bits”, W7-0. The
instruction sequence is shown in figure 17. Wrap bit W7 and the lower nibble W3-0 are not used.
W6, W5
W4 = 0
W4 =1 (DEFAULT)
Wrap Around
Wrap Length
Wrap Around
Wrap Length
0 0
Yes
8-byte
No
N/A
0 1
Yes
16-byte
No
N/A
1 0
Yes
32-byte
No
N/A
1 1
Yes
64-byte
No
N/A
Once W6-4 is set by a Set Burst with Wrap instruction, all the following “Fast Read Quad I/O” and “Word
Read Quad I/O” instructions will use the W6-4 setting to access the 8/16/32/64-byte section within any
page. To exit the “Wrap Around” function and return to normal read operation, another Set Burst with
Wrap instruction should be issued to set W4 = 1. The default value of W4 upon power on is 1. In the case
of a system Reset while W4 = 0, it is recommended that the controller issues a Set Burst with Wrap
instruction to reset W4 = 1 prior to any normal Read instructions since W25Q80BW does not have a
hardware Reset Pin.
Figure 17. Set Burst with Wrap Instruction Sequence
01
23
4
5
67
89
10
11
12
13
14
15
Mode 3
Mode 0
/CS
CLK
IO0
IO1
IO2
IO3
Instruction (77h)
don’t care don’t care don’t care
wrap bit
X
w6
w5
w4
X
01
23
4
5
67
89
10
11
12
13
14
15
Mode 3
Mode 0
/CS
CLK
IO0
IO1
IO2
IO3
Instruction (77h)
don’t care don’t care don’t care
wrap bit
X
w6
w5
w4
X
w6
w5
w4
X
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PDF描述 |
|---|---|
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| W33D2011 | LIQUID CRYSTAL DISPLAY DRIVER, PQFP64 |
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參數(shù)描述 |
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