234
CHAPTER 13 A/D CONVERTER
User’s Manual U12697EJ3V0UM
Figure 13-2. Format of A/D Converter Mode Register (ADM)
Address: 0FF80H After reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
ADM
ADCS
TRG
FR2
FR1
FR0
EGA1
EGA0
ADCE
ADCS
A/D conversion control
0
Conversion stop
1
Conversion enable
TRG
Software start/hardware start selection
0
Software start
1
Hardware start
FR2
FR1
FR0
A/D conversion time selection
Number of clocks
@f
XX
= 12.5 MHz
@f
XX
= 6.25 MHz
0
0
0
144/f
XX
Setting prohibited
23.0
µ
s
0
0
1
120/f
XX
Setting prohibited
19.2
µ
s
0
1
0
96/f
XX
Setting prohibited
15.4
µ
s
1
0
0
288/f
XX
23.0
µ
s
46.1
µ
s
1
0
1
240/f
XX
19.2
µ
s
38.4
µ
s
1
1
0
192/f
XX
15.4
µ
s
30.7
µ
s
Other than above
–
Setting prohibited
EGA1
EGA0
External trigger signal valid edge selection
0
0
No edge detection
0
1
Detection of falling edge
1
0
Detection of rising edge
1
1
Detection of both falling and rising edges
ADCE
Reference voltage circuit control
0
Circuit stopped
Note
1
Circuit operating
Note
The reference voltage circuit operates when ADCS is 1
Содержание mPD784225 Series
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