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參數資料
| 型號： | W25X40BLSNIG |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 4M X 1 FLASH 2.7V PROM, PDSO8 |
| 封裝： | 0.150 INCH, GREEN, PLASTIC, SOIC-8 |
| 文件頁數： | 19/53頁 |
| 文件大?。?/td> | 2041K |
| 代理商： | W25X40BLSNIG |
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W25X10BL/20BL/40BL
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9.2.12
Continuous Read Mode Bits (M7-0)
The “Continuous Read Mode” bits are used in conjunction with the “Fast Read Dual I/O” instruction to
provide the highest random Flash memory access rate with minimum SPI instruction overhead, thus
allow true XIP (execute in place) to be performed on serial flash devices.
M7-0 need to be set by the Dual I/O Read instruction. M5-4 are used to control whether the 8-bit SPI
instruction code BBh is needed or not for the next command. When M5-4 = (1,0), the next command
will be treated same as the current Dual I/O Read command without needing the 8-bit instruction code;
when M5-4 do not equal to (1,0), the device returns to normal SPI mode, all commands can be
accepted. M7-6 and M3-0 are reserved bits for future use, either 0 or 1 values can be used.
9.2.13
Continuous Read Mode Reset (FFFFh)
Continuous Read Mode Reset instruction can be used to set M4 = 1, thus the device will release the
Continuous Read Mode and return to normal SPI operation, as shown in figure 13.
1
0
2
/CS
Mode 0
Mode 3
4
6
8
10
12
Mode 0
Mode 3
CLK
IO0
IO
Mode Bit Reset
for Dual I/O
Don’t Care
FFFFh
/CS
Mode 0
Mode 3
CLK
IO0
IO
Don’t Care
1
3
5
7
9
11
13
14
15
Figure 13. Continuous Read Mode Reset for Fast Read Dual I/O
Since W25X10BL/20BL/40BL does not have a hardware Reset pin, so if the controller resets while
W25X10BL/20BL/40BL
are
set
to
Continuous
Mode
Read,
the W25X10BL/20BL/40BL
will
not recognize any initial standard SPI instructions from the controller. To address this possibility, it is
recommended to issue a Continuous Read Mode Reset instruction as the first instruction after a
system Reset. Doing so will release the device from the Continuous Read Mode and allow Standard
SPI instructions to be recognized.
To reset “Continuous Read Mode” during Dual I/O operation, sixteen clocks are needed to shift in
instruction “FFFFh”.
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相關代理商/技術參數 |
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|---|---|
| W25X40BLSSIG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M-BIT, 2M-BIT AND 4M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI |
| W25X40BLSVIG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:2.5V 4M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI |
| W25X40BLUXIG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:2.5V 4M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI |
| W25X40BLZPIG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M-BIT, 2M-BIT AND 4M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI |
| W25X40BV | 制造商:WINBOND 制造商全稱:Winbond 功能描述:1M-BIT, 2M-BIT AND 4M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI |
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