Chapter 8 a/d converter – NEC PD78214 User Manual
Page 258
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Chapter 8 A/D Converter
8
Fig. 8-3 A/D Converter Mode Register (ADM) Format
Note F
CLK
: System clock frequency
7
6
5
4
3
2
1
0
TRG
0
FR
CS
ADM
ANI2
ANI1
ANI0
MS
FR
ANI2
ANI1
ANI0
MS
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Specifies A/D conversion mode
Scan
mode
0
1
TRG
0
1
Select
mode
Scans AN0 input
Scans AN0 and AN1 inputs
Scans AN0 to AN2 inputs
Scans AN0 to AN3 inputs
Scans AN0 to AN4 inputs
Scans AN0 to AN5 inputs
Scans AN0 to AN6 inputs
Scans AN0 to AN7 inputs
Selects AN0 input
Selects AN1 input
Selects AN2 input
Selects AN3 input
Selects AN4 input
Selects AN5 input
Selects AN6 input
Selects AN7 input
Controls conversion speed
180/f
CLK
Note
120/f
CLK
Note
f
CLK
> 4 MHz
f
CLK
£ 4 MHz
Controls external terminal trigger
Disables external trigger
Enables external trigger
CS
0
1
Controls A/D conversion
Stops A/D conversion
Starts A/D conversion