HT46R221 Holtek Semiconductor Inc, HT46R221 Datasheet - Page 18

• Manufacturer Part Number: HT46R221
• Description: 8-Bit A/D Type MCU
• Manufacturer: Holtek Semiconductor Inc

Rev. 1.10
ACS0
ACS1
ACS2
PCR0
PCR1
PCR2
EOC
START
(ADCR)
Label
PCR2
0
0
0
0
1
1
1
1
Bits
0
1
2
3
4
5
6
7
PCR1
0
0
1
1
0
0
1
1
Defines the analog channel select.
Defines the port B configuration select.
If PCR0, PCR1 and PCR2 are all 0, the
ADC circuit is power off to reduce
power consumption
Provides response at the end of the
A/D conversion.
(0= end of A/D conversion)
Starts the A/D conversion. (0 1 0
=start; 0 1
ADCR register
PCR0
0
1
0
1
0
1
0
1
Function
reset A/D converter)
PB7
PB7
PB7
PB7
PB7
PB7
PB7
A7
7
PB6
PB6
PB6
PB6
PB6
PB6
PB6
A/D conversion timing
A6
6
Port B configuration
18
PB5
PB5
PB5
PB5
PB5
PB5
A5
A5
5
ACS2
0
0
0
0
1
1
1
1
PB4
PB4
PB4
PB4
PB4
A4
A4
A4
4
Analog input channel selection
ACS1
0
0
1
1
0
0
1
1
PB3
PB3
PB3
PB3
A3
A3
A3
A3
3
ACS0
HT46R22/HT46C22
0
1
0
1
0
1
0
1
PB2
PB2
PB2
A2
A2
A2
A2
A2
2
Analog Channel
PB1
PB1
A1
A1
A1
A1
A1
A1
1
October 2, 2002
A0
A1
A2
A3
A4
A5
A6
A7
PB0
A0
A0
A0
A0
A0
A0
A0
0