參數(shù)資料
型號(hào): M25PE20
廠商: 意法半導(dǎo)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(mén),串行閃存
文件頁(yè)數(shù): 6/37頁(yè)
文件大?。?/td> 198K
代理商: M25PE20
M25PE10, M25PE20
6/37
SPI MODES
These devices can be driven by a microcontroller
with its SPI peripheral running in either of the two
following modes:
CPOL=0, CPHA=0
CPOL=1, CPHA=1
For these two modes, input data is latched in on
the rising edge of Serial Clock (C), and output data
is available from the falling edge of Serial Clock
(C).
The difference between the two modes, as shown
in
Figure 5.
, is the clock polarity when the bus
master is in Standby mode and not transferring da-
ta:
C remains at 0 for (CPOL=0, CPHA=0)
C remains at 1 for (CPOL=1, CPHA=1)
Figure 4. Bus Master and Memory Devices on the SPI Bus
Note: The Top Sector Lock (TSL) signal should be driven, High or Low as appropriate.
Figure 5. SPI Modes Supported
AI10741B
Bus Master
(ST6, ST7, ST9,
ST10, Others)
SPI Memory
Device
SDO
SDI
SCK
C
Q
D
S
SPI Memory
Device
C
Q
D
S
SPI Memory
Device
C
Q
D
S
CS3
CS2
CS1
SPI Interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
TSL RP
TSL RP
TSL RP
AI01438B
C
MSB
CPHA
D
0
1
CPOL
0
1
Q
C
MSB
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