M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
Serial I/O Mode Register
b7b6 b5b4b3 b2b1b0
0
0
Serial I/O mode register (SM) [Address 00EB16
]
After reset
B
Functions
Name
R W
R W
0
b1 b0
0, 1
Internal synchronous
clock selection bits
(SM0, SM1)
0 0: f(XIN)/8 or f(XCIN)/8
0 1: f(XIN)/16 or f(XCIN)/16
1 0: f(XIN)/32 or f(XCIN)/32
1 1: f(XIN)/64 or f(XCIN)/64
0
0
R W
R W
2
3
0: External clock
1: Internal clock
Synchronous clock
selection bit (SM2)
0: P20, P21
Port function
1: SCLK, SOUT
selection bit (SM3)
0
0
R W
R W
Fix this bit to “0.”
4
5
6
7
0: LSB first
1: MSB first
Transfer direction
selection bit (SM5)
0: Input signal from SIN pin
1: Input signal from SOUT pin
Transfer clock input
pin selection bit (SM6)
0
0
R W
R W
Fix this bit to “0.”
Fig. 8.5.3 Serial I/O Mode Register
Rev.1.00 2003.11.25 page 28 of 128
RENESAS [ RENESAS TECHNOLOGY CORP ]
