M37160M8 Datasheet, PDF (29/131 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

M37160M8/MA/MF-XXXSP/FP,M37160EFSP/FP
Serial I/O Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0
0
Serial I/O mode register (SM) [Address 00EB16]
B
Name
0, 1 Internal synchronous
clock selection bits
(SM0, SM1)
Functions
After reset R W
b1 b0
0 RW
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
2 Synchronous clock
selection bit (SM2)
3 _{Port function}
selection bit (SM3)
4 Fix this bit to “0.”
0: External clock
1: Internal clock
0: P20, P21
1: SCLK, SOUT
0 RW
0 RW
0 RW
5 Transfer direction
selection bit (SM5)
0: LSB first
1: MSB first
0 RW
6 Transfer clock input 0: Input signal from SIN pin
0 RW
pin selection bit (SM6) 1: Input signal from SOUT pin
7 Fix this bit to “0.”
0 RW
Fig. 8.5.3 Serial I/O Mode Register
Rev.1.01 2003.11.13 page 29 of 130