SCK
MOSI
MISO
SO SI
SCK
SO SI SCK
FM25CL04
SPI
FM25CL04
Microcontroller
CS
HOLD
CS
HOLD
SS1
SS2
HOLD1
HOLD2
MOSI : Master Out Slave In
MISO : Master In Slave Out
SS : Slave Select
D
E
Figure 2. System Configuration with SPI port
D
P1.0
S
N
SO SI SCK
ME
FM25CL04
P1.1
N
Microcontroller
G
I
S
M
CS
HOLD
P1.2
E
O
D
C
Figure 3. System Configuration without SPI port
E
SPI Mode 0: CPOL=0, CPHA=0
W
R
E
T
N
O
R
7
6
5
4
3
2
1
0
N
O
SPI Mode 3: CPOL=1, CPHA=1
F
7
6
5
4
3
2
1
0
Figure 4. SPI Modes 0 & 3
Rev. 3.1
May 2005
Page 4 of 12