600
ADCR—A/D Control Register
H'FF99
A/D Converter
Bit
Initial value
Read/Write
7
TRGS1
0
R/W
6
TRGS0
0
R/W
5
—
1
—
4
—
1
—
3
CKS1
1
R/W
2
CH3
1
R/W
1
—
1
—
0
—
1
—
CH3
Channel Select
Selects the analog input channel(s). Make the input channel
setting when conversion is halted (ADST = 0).
CH2
*
CH1
*
CH0
*
Setting prohibited
Setting prohibited
Setting prohibited
Setting prohibited
AN12
AN13
AN14
AN15
AN0 (Initial value)
AN1
AN2
AN3
AN4
AN5
AN6
AN7
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Setting prohibited
Setting prohibited
Setting prohibited
Setting prohibited
AN12
AN12, AN13
AN12 to AN14
AN12 to AN15
AN0
AN0, AN1
AN0 to AN2
AN0 to AN3
AN4
AN4, AN5
AN4 to AN6
AN4 to AN7
Single Mode
Description
Channel Selection
Scan Mode
Bit 3
Description
Conversion time = 530 states (max.)
Conversion time = 68 states (max.)
Conversion time = 266 states (max.) (Initial value)
Conversion time = 134 states (max.)
A/D conversion start by external trigger is disabled
A/D conversion start by external trigger (TPU) is enabled
A/D conversion start by external trigger (8-bit timer) is enabled
A/D conversion start by external trigger pin (
ADTRG
) is enabled
Clock Select
CKS1
0
1
ADCSR Bit 3
CKS
0
1
0
1
Timer Trigger Select
TRGS1
0
1
TRGS0
0
1
0
1
Description
Note:
*
CH2, CH1, and CH0 are bits in ADCSR.
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