HT46R068B/HT46R069B
Enhanced A/D Type 8-bit OTP MCU
● ADCR Register
Bit
Name
R/W
7
START
R/W
0
6
EOCB
R
5
—
—
0
4
—
—
0
3
ACS3
R/W
0
2
ACSꢃ
R/W
0
1
ACS1
R/W
0
0
ACS0
R/W
0
POR
1
Bit 7
START: Start the A/D conversion
0→1→0: start
0→1: reset the A/D converter and set EOCB to "1"
This bit is used to initiate an A/D conversion process. The bit is normally low but
if set high and then cleared low again, the A/D converter will initiate a conversion
process. When the bit is set high the A/D converter will be reset.
Bit 6
EOCB: End of A/D conversion flag
0: A/D conversion ended
1: A/D conversion in progress
This read only flag is used to indicate when an A/D conversion process has
completed. When the conversion process is running the bit will be high.
Bit 5, Bit 4
unimplemented, read as "0"
Bit 3~0
ACS3, ACS2, ACS1, ACS0: Select A/D channel
0000: AN0
0001: AN1
0010: AN2
0011: AN3
0100: AN4
0101: AN5
0110: AN6
0111: AN7
1000: AN8
1001: AN9
1010: AN10
1011: AN11
1100: AN12
1101: AN13
1110: AN14
1111: AN15
These are the A/D channel select control bits. As there is only one internal hardware A/D converter
each of the eight A/D inputs must be routed to the internal converter using these bits.
Rev. 1.00
ꢄ3
�anꢀaꢁꢂ ꢃꢄꢅ ꢃ011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
