HT45R35
Pin Assignment
P B 3
P B 2
P A 3 /P B 3 /T M R 1 /R C 4
1
2
3
4
5
6
7
8
9
1 0
P A 2 /P B 2 /T M R 0 /R C 3
V S S
1
2
3
4
5
6
7
8
C R E F
R R E F
R C O U T /IN
P A 0 /IN T 0 /R C 1
P A 1 /IN T 1 /R C 2
P A 2 /T M R 0 /R C 3
P A 3 /T M R 1 /R C 4
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
O S C 2
O S C 1
V D D
R E S
P A 7 /R C 1 2
P A 6 /R C 1 1
P A 5 /R C 1 0
P A 4 /R C 9
P B 1
P B 0
V S S
C R E F
R R E F
R C O U T /IN
P A 0 /IN T 0 /R C 1
P A 1 /IN T 1 /R C 2
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
P A 4 /P B 4 /R C 9
P A 5 /P B 5 /R C 1 0
P B 6
P B 7
O S C 2
O S C 1
V D D
R E S
P A 7 /R C 1 2
P A 6 /R C 1 1
P B 1
P B 0
V S S
C R E F
R R E F
R C O U T /IN
P A 0 /IN T 0 /R C 1
P A 1 /IN T 1 /R C 2
P A 2 /T M R 0 /R C 3
P A 3 /T M R 1 /R C 4
9
1 0
1 1
1 2
8
7
6
5
4
3
2
1
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
P B 4
P B 5
P B 6
P B 7
O S C 2
O S C 1
V D D
R E S
P A 7 /R C 1 2
P A 6 /R C 1 1
P A 5 /R C 1 0
P A 4 /R C 9
H T 4 5 R 3 5
1 6 D IP -A /N S O P -A
H T 4 5 R 3 5
2 0 D IP -B /S O P -B
H T 4 5 R 3 5
2 4 S K D IP -B /S O P -B /S S O P -B
P B 3
1
2
3
4
5
6
7
8
9
P B 2
P B 1
P B 0
V S S
C R E F
R R E F
R C O U T /IN
P A 0 /IN T 0 /R C 1
P A 1 /IN T 1 /R C 2
P A 2 /T M R 0 /R C 3
P A 3 /T M R 1 /R C 4
R C 5
R C 6
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 0
1 1
1 2
1 3
1 4
1 9
1 8
1 7
1 6
1 5
P B 4
P B 5
P B 6
P B 7
O S C 2
O S C 1
V D D
C
R C O U
P A 0 /IN T 0
P A 1 /IN T 1
R
R E S
P A 7 /R C 1 2
P A 6 /R C 1 1
P A 5 /R C 1 0
P A 4 /R C 9
R C 8
R C 7
P B 0
N C
V S S
R E F
R E F
T /IN
/R C 1
/R C 2
1
2
3
4
5
6
7
8
O S C 2
P B 7
P B 6
P B 5
P B 4
P B 3
P B 2
P B 1
3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5
2 4
2 3
2 2
N C
N C
N C
O S
V D
R E
P A
P A
D
C 1
H T 4 5 R 3 5
3 2 Q F N -A
2 1
2 0
1 9
1 8
1 7
9 1 0 1 1 1 2 1 3 1 4 1 5 1 6
S
7 /R C 1 2
6 /R C 1 1
P A 5
P A 4
R C 8
R C 7
R C 6
R C 5
P A 3
P A 2
/T M R 1 /R C 4
/T M R 0 /R C 3
/R C 1 0
/R C 9
H T 4 5 R 3 5
2 8 S K D IP -A /S O P -A /S S O P -A
Pin Description
Pin Name
I/O
Options
Description
Bidirectional 8-bit I/O port. Each pin can be configured as a wake-up input
via configuration options. Software instructions determine if the pin is a
CMOS output or Schmitt trigger input. Pull-high resistors can be added to
the each pin via a configuration option.
Pins PA0 and PA1 are pin-shared with external interrupt input pins INT0
and INT1, respectively. Configuration options determine the interrupt en-
able/disable and the interrupt low/high trigger type. Pins PA2 is
pin-shared with the external timer input pins TMR.
Each Pin of PA0~PA3 and PA4~PA7 are pin-shared with RC1~RC4 and
RC9~RC12 respectively via configuration options.
RC1~RC4 and RC9~RC12 are capacitor or resistor connection pins.
Bidirectional 8-bit I/O port. Software instructions determine if the pin is a
CMOS output or Schmitt trigger input. Pull-high resistors can be added to
the each pin via a configuration option.
Capacitor or resistor connection pins
Capacitor or resistor connection pin to RC OSC
Oscillation input pin
Reference resistor connection pin
Reference capacitor connection pin
PA0/INT0/RC1
PA1/INT1/RC2
PA2/TMR/RC3
PA3/RC4
PA4/RC9
PA5/RC10
PA6/RC11
PA7/RC12
I/O
Pull-high*
Wake-up
PB0~PB7
RC5~RC8
RCOUT
IN
RREF
CREF
I/O
I
I
I
O
O
Pull-high*
¾
¾
¾
¾
¾
Rev. 1.30
3
May 14, 2010
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
