參數(shù)資料
型號: HD40A4669
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 54/142頁
文件大小: 894K
代理商: HD40A4669
HD404669 Series
54
Bit
Initial value
Read/Write
Bit name
3
0
W
SM1A3
2
0
W
SM1A2
0
0
W
SM1A0
1
0
W
SM1A1
Serial mode register 1A (SM1A: $005)
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
ratio
÷
2048
÷
512
÷
128
÷
32
÷
8
÷
2
Prescaler
division
SM1A2
SM
SM1A1
SM1A3
0
1
R4
1
/
SCK
1
mode selection
SCK
1
R4
1
SCK
1
Figure 35 Serial Mode Register 1A (SM1A)
0
1
×
×
: Don't care
0
1
COMP
0
COMP
1
Not Used
Analog input pin selection
Comparator operation selection
Compare enable register (CER: $018)
0
1
Normal operation (digital input mode): RD
0
/COMP
0
and RD
1
/COMP
1
pins function as R
port pins
Comparator operation (analog input mode): RD
0
/COMP
0
and RD
1
/COMP
1
pins function
as comparator pins
Bit
Initial value
Read/Write
Bit name
3
0
W
CER3
2
Not Used
0
0
W
CER0
1
0
W
CER1
CER3
CER1
CER0
Figure 36 Compare Enable Register (CER)
相關(guān)PDF資料
PDF描述
HD404668 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
HD404669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
HD407A4669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
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