参数资料
| 型号： | W25Q40BWSNIG |
| 厂商： | Winbond Electronics |
| 文件页数： | 37/73页 |
| 文件大小： | 0K |
| 描述： | IC FLASH SPI 4MBIT 8SOIC |
| 标准包装： | 100 |
| 系列： | SpiFlash® |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | FLASH |
| 存储容量： | 4M (512K x 8) |
| 速度： | 80MHz |
| 接口： | SPI 串行 |
| 电源电压： | 1.65 V ~ 1.95 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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W25Q40BW
8.2.19
Continuous Read Mode Bits (M7-0)
The “Continuous Read Mode” bits are used in conjunction with “Fast Read Dual I/O”, “Fast Read Quad
I/O”, “Word Read Quad I/O” and “Octal Word Read Quad I/O” instructions 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/Quad I/O Read instructions. M5-4 are used to control whether the 8-bit
SPI instruction code (BBh, EBh, E7h or E3h) is needed or not for the next command. When M5-4 = (1,0),
the next command will be treated same as the current Dual/Quad 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.
8.2.20
Continuous Read Mode Reset (FFh or 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 18.
Mode Bit Reset
/CS
Mode Bit Reset
for Quad I/O
for Dual I/O
Mode 3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Mode 3
CLK
IO 0
IO 1
IO 2
IO 3
Mode 0
FFh
Don ’ t Care
Don ’ t Care
Don ’ t Care
FFh
Mode 0
Figure 18. Continuous Read Mode Reset for Fast Read Dual/Quad I/O
Since W25Q40BW does not have a hardware Reset pin, so if the controller resets while W25Q40BW is
set to Continuous Mode Read, the W25Q40BW 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 Quad I/O operation, only eight clocks are needed. The
instruction is “FFh”. To reset “Continuous Read Mode” during Dual I/O operation, sixteen clocks are
needed to shift in instruction “FFFFh”.
Publication Release Date: October 11, 2013
- 37 -
Revision F
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W25Q40BWSNIG TR | 制造商:Winbond Electronics Corp 功能描述:IC FLASH 4MBIT 80MHZ 8SOIC |
| W25Q40BWSNIP | 制造商:WINBOND 制造商全称:Winbond 功能描述:1.8V 4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
| W25Q40BWSSIG | 功能描述:IC FLASH SPI 4MBIT 8SOIC RoHS:是 类别:集成电路 (IC) >> 存储器 系列:SpiFlash® 标准包装:2,000 系列:- 格式 - 存储器:RAM 存储器类型:SRAM - 异步 存储容量:256K (32K x 8) 速度:15ns 接口:并联 电源电压:3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:28-TSSOP（0.465"，11.8mm 宽） 供应商设备封装:28-TSOP 包装:带卷 (TR) 其它名称:71V256SA15PZGI8 |
| W25Q40BWSSIG TR | 制造商:Winbond Electronics Corp 功能描述:IC FLASH 4MBIT 80MHZ 8SOIC |
| W25Q40BWUXIG | 制造商:WINBOND 制造商全称:Winbond 功能描述:1.8V 4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
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