FM25W256 - 256Kb SPI F-RAM
SCK
MOSI
MISO
SO SI SCK
FM25W256
SO SI SCK
FM25W256
SPI
Microcontroller
CS
HOLD
CS
HOLD
SS1
SS2
HOLD1
HOLD2
MOSI: Master Out Slave In
MISO: Master In Slave Out
SS : Slave Select
Figure 2. System Configuration with SPI port
P1.0
P1.1
Microcontroller
SO SI SCK
FM25W256
CS
HOLD
P1.2
Figure 3. System Configuration without SPI port
SPI Mode 0: CPOL=0, CPHA=0
7
6
5
4
3
2
1
0
SPI Mode 3: CPOL=1, CPHA=1
7
6
5
4
3
2
1
0
Figure 4. SPI Modes 0 & 3
Rev. 1.3
Feb. 2011
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