HT46C47 Holtek Semiconductor, HT46C47 Datasheet - Page 19

• Manufacturer Part Number: HT46C47
• Description: (HT46C46 / HT46C47) Cost-Effective A/D Type 8-Bit MCU
• Manufacturer: Holtek Semiconductor

Rev. 1.00
Bit No.
Bit No.
2~6
0
1
2
3
4
5
6
7
0
1
7
ADCS0
ADCS1
START
EOCB
Label
ACS0
ACS1
ACS2
PCR0
PCR1
PCR2
Label
TEST
Select the A/D converter clock source.
0, 0: f
0, 1: f
1, 0: f
1, 1: Undefined, cannot be used.
Unused bit, read as 0 .
For internal test only.
ACS2, ACS1, ACS0: Select A/D channel
0, 0, 0: AN0
0, 0, 1: AN1
0, 1, 0: AN2
0, 1, 1: AN3
1, X, X: undefined, cannot be used
PCR2, PCR1, PCR0: PB3~PB0 configurations
0, 0, 0: PB3 PB2 PB1 PB0 (The ADC circuit is power off to reduce power consumption.)
0, 0, 1: PB3 PB2 PB1 AN0
0, 1, 0: PB3 PB2 AN1 AN0
0, 1, 1: PB3 AN2 AN1 AN0
1, x, x: AN3 AN2 AN1 AN0
End of A/D conversion flag.
(0: end of A/D conversion)
Start the A/D conversion
0 1 0= Start
0 1= Reset A/D converter and set EOCB to 1
SYS
SYS
SYS
/2
/8
/32
A/D Conversion Timing
ADCR (22H) Register
ACSR (23H) Register
HT46R46/HT46C46/HT46R47/HT46C47
19
Function
Function
December 28, 2004