參數(shù)資料
型號(hào): HD40A4639R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位單片機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 54/133頁
文件大?。?/td> 803K
代理商: HD40A4639R
HD404639R Series
54
Bit
Initial value
Read/Write
Bit name
3
0
W
SM2A3
2
0
W
SM2A2
0
0
W
SM2A0
1
0
W
SM2A1
Serial mode register 2A (SM2A: $01B)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Output
Output
Output
Output
Output
Output
Output
Input
Prescaler
Prescaler
Prescaler
Prescaler
Prescaler
Prescaler
System clock
External clock
÷
2048
÷
512
÷
128
÷
32
÷
8
÷
2
Prescaler
ratio
SM2A2
SM
SM2A1
SM2A3
0
1
R5
1
/
SCK
2
mode selection
SCK
2
R5
1
SCK
2
Figure 35 Serial Mode Register 2A (SM2A)
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