ht48c50-1 Holtek Semiconductor Inc., ht48c50-1 Datasheet - Page 3

• Manufacturer Part Number: ht48c50-1
• Description: Ht48r50a-1/ht48c50-1 -- I/o Type 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Assignment
Pin Description
Rev. 2.00
PA0~PA7
PB0/BZ
PB1/BZ
PB2~PB7
PD0~PD7
VSS
PG0/INT
TMR0
PC0~PC7
TMR1
Pin Name
I/O
I/O
I/O
I/O
I/O
I/O
I
I
CMOS/Schmitt
I/O or BZ/BZ
trigger Input
Pull-high*
Pull-high*
Pull-high*
Pull-high*
Wake-up
Pull-high*
Options
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)
3
Description
HT48R50A-1/HT48C50-1
March 8, 2006