HT48R70A-1_07 HOLTEK [Holtek Semiconductor Inc], HT48R70A-1_07 Datasheet - Page 3

• Manufacturer Part Number: HT48R70A-1_07
• Description: I/O Type 8-Bit MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Pin Assignment
Pin Description
Rev. 2.10
PA0~PA7
PB0/BZ
PB1/BZ
PB2~PB7
VSS
INT
TMR0
TMR1
PC0~PC7
RES
VDD
Pin Name
I/O
I/O
I/O
I/O
I
I
I
I
CMOS or Schmitt
I/O or BZ/BZ
Pull-high*
Pull-high*
Pull-high*
Wake-up
Options
Input
Bidirectional 8-bit input/output ports
Each bit can be configured as a wake-up input by options. Software instruc-
tions determine the CMOS output or Schmitt trigger or CMOS input with or with-
out pull high resistor (by options).
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
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).
Negative power supply, ground
External interrupt Schmitt trigger without pull high resistor
Edge trigger is activated during high to low transition.
Schmitt trigger input for Timer/Event Counter 0
Schmitt trigger input for Timer/Event Counter 1
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Schmitt trigger reset input, active low
Positive power supply
3
Description
HT48R70A-1/HT48C70-1
August 7, 2007