HT45FM03B
Pad Description
Pad Name
PA0/OPVINP
PA1/CVINP
PA2/CVINN
PA3/COUT
PA4/INT0A
PA5/INT0B
PA6/INT0C
PA7/INT1
PB0/AN0
PB1/AN1
PB2/AN2/OPOUT
PB3/AN3/OPVINN
PB4/AN4/INT0A
PB5/AN5/INT0B
PB6/AN6/INT0C
PB7/AN7/TMR0/TMR1
PC0/PWM0H
PC1/PWM0L
PC2/PWM1H
PC3/PWM1L
PC4/PWM2H
PC5/PWM2L
I/O
Option
Description
Bidirectional 8-bit input/output port. Each pin can be configured as
wake-up input by configuration option. Software instructions determine
if the pin is a CMOS output or Schmitt Trigger input. Configuration op-
tions determine if the pins have pull-high resistors. Pins PA4~PA6 are
pin-shared with INT0A, INT0B and INT0C, the function being selected
via configuration options. PA7 is pin-shared with the external interrupt
pin INT1. PA1, PA2 and PA3 are pin-shared with comparator pins
CVINP, CVINN and COUT. PA0 is shared with OPVINP.
Bidirectional 8-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Configuration op-
tions determine if the pins have pull-high resistors. PB is pin-shared
with the A/D inputs. Pins PB4~PB6 are also pin-shared with INT0A,
INT0B and INT0C, the function being selected via configuration op-
tions. Pins PB2 and PB3 are also pin pin-shared with operational am-
plifier pins OPOUT and OPVINN. Pin PB7 is also pin-shared with timer
input pins TMR0 and TMR1.
Bidirectional 6-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Configuration op-
tions determine if the pins have pull-high resistors. PC is pin shared
with the Pulse Width Modulation complimentary output pairs,
PWM0H~PWM2H and PWM0L~PWM2L.
Bidirectional 1-line I/O. Software instructions determine if the pin is a
CMOS output or Schmitt Trigger input. A configuration option deter-
mines if pin PD0 has a pull-high resistor. Pin PD0 is shared with the
PFD output.
Bidirectional 1-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Pin PD1 does not
have a pull-high option. Pin PD1 is pin-shared with the reset input pin
RES. RES is a Schmitt Trigger reset input. Active low.
Bidirectional 2-line I/O. Software instructions determine if the pins are
CMOS outputs or Schmitt Trigger inputs. Pin PD2~PD3 do not have
pull-high options. Configuration options determine if the pins are to be
used as oscillator pins or I/O pins. Configuration options also deter-
mine which oscillator mode is selected. The three oscillator modes are:
1. Internal RC OSC: both pins configured as I/Os.
2. External crystal OSC: both pins configured as OSC1/OSC2.
3. External RC OSC+PD3: PD2 is configured as OSC1 pin, PD3 con-
figured as an I/O.
If the internal RC OSC is selected, the frequency will be fixed at either
12MHz, 16MHz or 20MHz, dependent upon which configuration option
is chosen.
Negative power supply, ground
Ground connection for A/D converter. The VSS and AVSS are the
same pin at 28 pin package.
Positive power supply
Power supply connection for A/D converter. The VDD and AVDD are
the same pin at 28 pin package.
I/O
Pull-high
Wake-up
INT0A
INT0B
INT0C
I/O
Pull-high
INT0A
INT0B
INT0C
I/O
Pull-high
PD0/PFD
I/O
Pull-high
PFD
PD1/RES
I/O
PD1 or
RES
PD2/OSC1
PD3/OSC2
I/O
1.Int. RC
OSC
2.Crystal
OSC
3.Ext. RC
OSC
VSS
AVSS
VDD
AVDD
¾
¾
¾
¾
¾
¾
¾
¾
Rev. 1.00
3
December 16, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
