参数资料
型号: M37161MF-XXXSP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
封装: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件页数: 51/129页
文件大小: 1092K
代理商: M37161MF-XXXSP
Rev.1.00
2003.11.25
page 28 of 128
M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
Fig. 8.5.3 Serial I/O Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
Serial I/O mode register (SM) [Address 00EB16]
B
Name
Functions
After reset RW
Serial I/O Mode Register
0, 1 Internal synchronous
clock selection bits
(SM0, SM1)
b1 b0
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
5
Transfer direction
selection bit (SM5)
0
0: P20, P21
1: SCLK, SOUT
0: External clock
1: Internal clock
0: LSB first
1: MSB first
6
Fix this bit to “0.”
0
Transfer clock input
pin selection bit (SM6)
0: Input signal from SIN pin
1: Input signal from SOUT pin
RW
R W
RW
0
7
Fix this bit to “0.”
0R W
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