HT48R50A-1/HT48C50-1
Pin Assignment
P B 5
P B 4
P A 3
P A 2
P A 1
P A 0
P B 3
P B 2
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
P B 1 /B Z
P B 0 /B Z
P B 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
P B 4
P A 3
P A 2
P A 1
P A 0
P B 3
P B 2
P B 1 /B Z
P B 0 /B Z
V S S
P G 0 /IN T
P C 0 /T M R 0
P C 1
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
P B 6
P B 7
P A 4
P A 5
P A 6
P A 7
O S C 2 /P G 2
O S C 1 /P G 1
V D D
R E S
P C 5 /T M R 1
P C 4
P C 3
P C 2
N C
N C
N C
N C
P D 7
P D 6
P D 5
P D 4
V S S
P G 0 /IN T
T M R 0
P C 0
P C 1
P C 2
7
6
5
4
3
2
1
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
P B 6
P B 7
P A 4
P A 5
P A 6
P A 7
N C
N C
N C
N C
O S C 2 /P G 2
O S C 1 /P G 1
V D D
R E S
T M R 1
P D 3
P D 2
P D 1
P D 0
P C 7
P C 6
P C 5
P C 4
P C 3
H T 4 8 R 5 0 A -1 /H T 4 8 C 5 0 -1 -A
2 8 S K D IP -A /S O P -A
H T 4 8 R 5 0 A -1 /H T 4 8 C 5 0 -1 -A
4 8 S S O P -A
Pin Description
Pin Name
I/O
Options
Pull-high*
Wake-up
CMOS/Schmitt
trigger Input
Description
Bidirectional 8-bit input/output port. Each bit can be configured as a
wake-up input by options. Software instructions determine the CMOS out-
put or Schmitt trigger or CMOS input with pull-high resistor (determined by
pull-high option).
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output or Schmitt trigger input with pull-high resistor (determined by
pull-high option).
The PB0 and PB1 are pin-shared with the BZ and BZ, respectively. Once
the PB0 and PB1 are selected as buzzer driving outputs, the output signals
come from an internal PFD generator (shared with Timer/Event Counter 0).
Bidirectional I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tion).
Negative power supply, ground
Bidirectional I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tion). This external interrupt input is pin-shared with PG0. The external in-
terrupt input is activated on a high to low transition.
Timer/Event Counter 0 Schmitt trigger input (without pull-high resistor)
Bidirectional I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tion).
Timer/Event Counter 1 Schmitt trigger input (without pull-high resistor)
PA0~PA7
I/O
PB0/BZ
PB1/BZ
PB2~PB7
I/O
Pull-high*
I/O or BZ/BZ
PD0~PD7
VSS
I/O
¾
Pull-high*
¾
PG0/INT
I/O
Pull-high*
TMR0
PC0~PC7
TMR1
I
I/O
I
¾
Pull-high*
¾
Rev. 2.01
3
January 9, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
