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參數資料
| 型號： | M25P40 |
| 廠商： | 意法半導體 |
| 元件分類： | DRAM |
| 英文描述： | 4 Mbit Uniform Sector, Serial Flash Memory |
| 中文描述： | 4兆位統(tǒng)一部門，串行閃存 |
| 文件頁數： | 13/51頁 |
| 文件大?。?/td> | 398K |
| 代理商： | M25P40 |
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M25P40
Operating features
13/51
Table 2.
4.7
Hold Condition
The Hold (HOLD) signal is used to pause any serial communications with the device without
resetting the clocking sequence. However, taking this signal Low does not terminate any
Write Status Register, Program or Erase cycle that is currently in progress.
To enter the Hold condition, the device must be selected, with Chip Select (S) Low.
The Hold condition starts on the falling edge of the Hold (HOLD) signal, provided that this
coincides with Serial Clock (C) being Low (as shown in
Figure 5
).
The Hold condition ends on the rising edge of the Hold (HOLD) signal, provided that this
coincides with Serial Clock (C) being Low.
If the falling edge does not coincide with Serial Clock (C) being Low, the Hold condition
starts after Serial Clock (C) next goes Low. Similarly, if the rising edge does not coincide
with Serial Clock (C) being Low, the Hold condition ends after Serial Clock (C) next goes
Low. (This is shown in
Figure 5
).
During the Hold condition, the Serial Data Output (Q) is high impedance, and Serial Data
Input (D) and Serial Clock (C) are Don’t Care.
Normally, the device is kept selected, with Chip Select (S) driven Low, for the whole duration
of the Hold condition. This is to ensure that the state of the internal logic remains unchanged
from the moment of entering the Hold condition.
If Chip Select (S) goes High while the device is in the Hold condition, this has the effect of
resetting the internal logic of the device. To restart communication with the device, it is
necessary to drive Hold (HOLD) High, and then to drive Chip Select (S) Low. This prevents
the device from going back to the Hold condition.
Protected Area Sizes
Status Register
Content
Memory Content
BP2
Bit
BP1
Bit
BP0
Bit
Protected Area
Unprotected Area
0
0
0
none
All sectors
(1)
(eight sectors: 0 to 7)
1.
The device is ready to accept a Bulk Erase instruction if, and only if, all Block Protect (BP2, BP1, BP0) are
0.
0
0
1
Upper eighth (Sector 7)
Lower seven-eighths (seven sectors: 0 to
6)
0
1
0
Upper quarter (two sectors: 6 and 7) Lower three-quarters (six sectors: 0 to 5)
0
1
1
Upper half (four sectors: 4 to 7)
Lower half (four sectors: 0 to 3)
1
0
0
All sectors (eight sectors: 0 to 7)
none
1
0
1
All sectors (eight sectors: 0 to 7)
none
1
1
0
All sectors (eight sectors: 0 to 7)
none
1
1
1
All sectors (eight sectors: 0 to 7)
none
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相關代理商/技術參數 |
參數描述 |
|---|---|
| M25P40_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit, low voltage, serial Flash memory with 50 MHz SPI bus interface |
| M25P40_12 | 制造商:MICRON 制造商全稱:Micron Technology 功能描述:Micron M25P40 Serial Flash Embedded Memory |
| M25P40-VMB3TPB | 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE - Tape and Reel |
| M25P40-VMB3TPB TR | 制造商:Micron Technology Inc 功能描述:IC FLASH 4MBIT 75MHZ 8UFDFPN |
| M25P40-VMB6TPB | 制造商:Micron Technology Inc 功能描述:4MBIT SPI NOR FLASH 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE FLASH - Cut TR (SOS) 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE FLASH - Tape and Reel 制造商:Micron Technology Inc 功能描述:NOR Flash Serial-SPI 2.5V/3.3V 4Mbit 512K x 8bit 8ns 8-Pin UFDFPN EP T/R |
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