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HT46C23 Datasheet(PDF) 18 Page - Holtek Semiconductor Inc

Part # HT46C23
Description  A/D Type 8-Bit MCU
PDF  48 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46C23 Datasheet(HTML) 18 Page - Holtek Semiconductor Inc

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HT46R23/HT46C23
Rev. 1.60
18
May 3, 2004
Label
(ACSR)
Bits
Function
ADCS0
ADCS1
0
1
Selects the A/D converter clock source
00= system clock/2
01= system clock/8
10= system clock/32
11= undefined
¾
2~6 Unused bit, read as
²0²
TEST
7
For test mode used only
ACSR Register
Label
(ADCR)
Bits
Function
ACS0
ACS1
ACS2
0
1
2
Defines the analog channel select.
PCR0
PCR1
PCR2
3
4
5
Defines the port B configuration select.
If PCR0, PCR1 and PCR2 are all zero,
the ADC circuit is power off to reduce
power consumption
EOCB
6
Provides response at the end of the
A/D conversion.
(0= end of A/D conversion)
START
7
Starts the A/D conversion. (0
®1®0=
start; 0
®1= reset A/D converter)
ADCR Register
ACS2
ACS1
ACS0
Analog Channel
00
0
A0
00
1
A1
01
0
A2
01
1
A3
10
0
A4
10
1
A5
11
0
A6
11
1
A7
Analog Input Channel Selection
When the A/D conversion is completed, the A/D inter-
rupt request flag is set. The EOCB bit is set to
²1² when
the START bit is set from
²0² to ²1².
Register
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
ADRL
D1
D0
¾
¾¾¾¾¾
ADRH
D9
D8
D7
D6
D5
D4
D3
D2
Note:
D0~D9 is A/D conversion result data bit
LSB~MSB.
PCR2
PCR1
PCR0
7
6
5
4
3
2
1
0
0
0
0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
0
0
1
PB7
PB6
PB5
PB4
PB3
PB2
PB1
A0
0
1
0
PB7
PB6
PB5
PB4
PB3
PB2
A1
A0
0
1
1
PB7
PB6
PB5
PB4
PB3
A2
A1
A0
1
0
0
PB7
PB6
PB5
PB4
A3
A2
A1
A0
1
0
1
PB7
PB6
PB5
A4
A3
A2
A1
A0
1
1
0
PB7
PB6
A5
A4
A3
A2
A1
A0
1
1
1
A7A6A5
A4
A3
A2
A1A0
Port B Configuration



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