Bit No; Label Function - Holtek HT46RU67 Manual

Bit No.

Label
Selects the A/D converter clock source
00=system clock/2
0 ADCS0
01=system clock/8
1 ADCS1
10=system clock/32
11=undefined
¾ Unused bit, read as ²0²
2~6
7 TEST For test mode used only
Bit No. Label
ACS2, ACS1, ACS0: Select A/D channel
0, 0, 0: AN0
0, 0, 1: AN1
0 ACS0 0, 1, 0: AN2
1 ACS1 0, 1, 1: AN3
2 ACS2 1, 0, 0: AN4
1, 0, 1: AN5
1, 1, 0: AN6
1, 1, 1: AN7
3 PCR0
Defines the Port B configuration select. If PCR0, PCR1 and PCR2 are all zero, the ADC circuit is
4 PCR1
powered off to reduce power consumption.
5 PCR2
Indicates end of A/D conversion. (0 = end of A/D conversion)
Each time bits 3~5 change state the A/D should be initialised by issuing a START signal, other-
6 EOCB
wise the EOCB flag may have an undefined condition. See ²Important note for A/D initialisation².
START Starts the A/D conversion. (0®1®0= start; 0®1= Reset A/D converter and set EOCB to ²1²)
7
PCR2 PCR1 PCR0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Register Bit7
ADRL D3
ADRH D11
Note: D0~D11 is A/D conversion result data bit LSB~MSB.
Rev. 1.30
ACSR (27H) Register
ADCR (26H) Register
7 6 5
PB7 PB6 PB5
PB7 PB6 PB5
PB7 PB6 PB5
PB7 PB6 PB5
PB7 PB6 PB5
PB7 PB6 PB5
PB7 PB6 AN5
AN7 AN6 AN5
Port B Configuration
Bit6 Bit5 Bit4
D2 D1 D0
D10 D9 D8
ADRL (24H), ADRH (25H) Register
29
HT46RU67/HT46CU67
Function
Function
4 3 2
PB4 PB3 PB2
PB4 PB3 PB2
PB4 PB3 PB2
PB4 PB3 AN2
PB4 AN3 AN2
AN4 AN3 AN2
AN4 AN3 AN2
AN4 AN3 AN2
Bit3 Bit2
¾ ¾
D7 D6
1 0
PB1 PB0
PB1 AN0
AN1 AN0
AN1 AN0
AN1 AN0
AN1 AN0
AN1 AN0
AN1 AN0
Bit1 Bit0
¾ ¾
D5 D4
June 10, 2014