HT45R35V Holtek Semiconductor Inc., HT45R35V Datasheet - Page 21

• Manufacturer Part Number: HT45R35V
• Description: C/r To F Type 8-bit Otp Mcu
• Manufacturer: Holtek Semiconductor Inc.

Analog Switch
There are 12 analog switch lines in the device for RC1~RC12, and three corresponding Analog Switch Control regis-
ters, which are ASCR0, ASCR1 and ASCR2.
If the configuration options select PA0~PA3 to be normal I/O pins, then the corresponding bit 0~bit3 bits in the ASCR0
register will be unimplemented and will be read as zero.
If the configuration options select PA4~PA7 to be normal I/O pins, then the corresponding bit 0~bit3 bits in the ASCR1
register will be unimplemented and will be read as zero.
Rev. 1.00
Bit No.
Bit No.
4~7
0
1
2
3
4
5
6
7
0
1
2
3
AS10ON
AS11ON
AS12ON
AS1ON
AS2ON
AS3ON
AS4ON
AS5ON
AS6ON
AS7ON
AS8ON
AS9ON
Label
Label
Defines RC1 analog switch is on or off. AS1ON=
0=Analog switch 1 on, and RC1 is disconnected to pull-low
1=Analog switch 1 off, and RC1 is connected to pull-low or not according ASPLON0 register
Defines RC2 analog switch is on or off. AS2ON=
0=Analog switch 2 on, and RC2 is disconnected to pull-low
1=Analog switch 2 off, and RC2 is connected to pull-low or not according ASPLON0 register
Defines RC3 analog switch is on or off. AS3ON=
0=Analog switch 3 on, and RC3 is disconnected to pull-low
1=Analog switch 3 off, and RC3 is connected to pull-low or not according ASPLON1 register
Defines RC4 analog switch is on or off. AS4ON=
0=Analog switch 4 on, and RC4 is disconnected to pull-low
1=Analog switch 4 off, and RC4 is connected to pull-low or not according ASPLON1 register
Defines RC5 analog switch is on or off. AS5ON=
0=Analog switch 5 on, and RC5 is disconnected to pull-low
1=Analog switch 5 off, and RC5 is connected to pull-low or not according ASPLON2 register
Defines RC6 analog switch is on or off. AS6ON=
0=Analog switch 6 on, and RC6 is disconnected to pull-low
1=Analog switch 6 off, and RC6 is connected to pull-low or not according ASPLON2 register
Defines RC7 analog switch is on or off. AS7ON=
0=Analog switch 7 on, and RC7 is disconnected to pull-low
1=Analog switch 7 off, and RC7 is connected to pull-low or not according ASPLON3 register
Defines RC8 analog switch is on or off. AS8ON=
0=Analog switch 8 on, and RC8 is disconnected to pull-low
1=Analog switch 8 off, and RC8 is connected to pull-low or not according ASPLON3 register
Defines RC9 analog switch is on or off. AS9ON=
0=Analog switch 9 on, and RC9 is disconnected to pull-low
1=Analog switch 9 off, and RC9 is connected to pull-low or not according ASPLON4 register
Defines RC10 analog switch is on or off. AS10ON=
0=Analog switch 10 on, and RC10 is disconnected to pull-low
1=Analog switch 10 off, and RC10 is connected to pull-low or not according ASPLON4 register
Defines RC11 analog switch is on or off. AS11ON=
0=Analog switch 11 on, and RC11 is disconnected to pull-low
1=Analog switch 11 off, and RC11 is connected to pull-low or not according ASPLON5 register
Defines RC12 analog switch is on or off. AS12ON=
0=Analog switch 12 on, and RC12 is disconnected to pull-low
1=Analog switch 12 off, and RC12 is connected to pull-low or not according ASPLON5 register
Unused bit, read as 0
ASCR0 (1AH) Register
ASCR1 (1BH) Register
21
Function
Function
January 15, 2009
HT45R35V