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參數(shù)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(shù)： | 26/51頁 |
| 文件大?。?/td> | 398K |
| 代理商： | M25P40 |
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Instructions
M25P40
26/51
6.7
Read Data Bytes at Higher Speed (FAST_READ)
The device is first selected by driving Chip Select (S) Low. The instruction code for the Read
Data Bytes at Higher Speed (FAST_READ) instruction is followed by a 3-byte address (A23-
A0) and a dummy byte, each bit being latched-in during the rising edge of Serial Clock (C).
Then the memory contents, at that address, is shifted out on Serial Data Output (Q), each
bit being shifted out, at a maximum frequency f
C
, during the falling edge of Serial Clock (C).
The instruction sequence is shown in
Figure 13
.
The first byte addressed can be at any location. The address is automatically incremented
to the next higher address after each byte of data is shifted out. The whole memory can,
therefore, be read with a single Read Data Bytes at Higher Speed (FAST_READ)
instruction. When the highest address is reached, the address counter rolls over to
000000h, allowing the read sequence to be continued indefinitely.
The Read Data Bytes at Higher Speed (FAST_READ) instruction is terminated by driving
Chip Select (S) High. Chip Select (S) can be driven High at any time during data output. Any
Read Data Bytes at Higher Speed (FAST_READ) instruction, while an Erase, Program or
Write cycle is in progress, is rejected without having any effects on the cycle that is in
progress.
Figure 13.
Read Data Bytes at Higher Speed (FAST_READ)
Instruction Sequence
and Data-Out Sequence
1.
Address bits A23 to A19 are Don’t Care.
C
D
AI04006
S
Q
23
2
1
3
4
5
6
7
8
9 10
28 29 30 31
22 21
3
2
1
0
High Impedance
Instruction
24 BIT ADDRESS
0
C
D
S
Q
32 33 34
36 37 38 39 40 41 42 43 44 45 46
7
6
5
4
3
2
0
1
DATA OUT 1
Dummy Byte
MSB
7
6
5
4
3
2
1
0
DATA OUT 2
MSB
MSB
7
47
7
6
5
4
3
2
0
1
35
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相關代理商/技術參數(shù) |
參數(shù)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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