参数资料
型号: M37224M3-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, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件页数: 16/83页
文件大小: 901K
代理商: M37224M3-XXXSP
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
23
b7 b6 b5 b4 b3 b2 b1 b0
Serial I/O mode register (SM) [Address 00DC16]
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)/4
0
1: f(XIN)/16
1
0: f(XIN)/32
1
1: f(XIN)/64
2
Synchronous clock
selection bit (SM2)
3
Serial I/O port
selection bit (SM3)
4
5
Transfer direction
selection bit (SM5)
7
0
0: P20, P21 functions
as port
1: SCLK, SOUT
0: External clock
1: Internal clock
0: LSB first
1: MSB first
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
6
Fix this bit to “0.”
0
Serial input pin
selection bit (SM6)
0: Input signal from S IN pin
1: Input signal from S OUT pin
RW
R—
Fig. 20. Serial I/O Mode Register
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