FM25040A
SCK
MOSI
MISO
SO SI
SCK
SO SI SCK
FM25040A
SPI
FM25040A
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
SO SI SCK
FM25040A
Microcontroller
CS HOLD
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. 3.0
May 2006
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