
General Description
Pin Functions
MC68HC705C8A
—
Rev. 3
Technical Data
MOTOROLA
General Description
33
1.7.7 Output Compare Pin (TCMP)
The TCMP pin is the output compare pin for the on-chip
capture/compare timer. See
Section 8. Capture/Compare Timer
.
1.7.8 Port A I/O Pins (PA7
–
PA0)
These eight I/O lines comprise port A, a general-purpose, bidirectional
I/O port. The pins are programmable as either inputs or outputs under
software control of the data direction registers. See
7.3 Port A
.
1.7.9 Port B I/O Pins (PB7
–
PB0)
These eight I/O pins comprise port B, a general-purpose, bidirectional
I/O port. The pins are programmable as either inputs or outputs under
software control of the data direction registers. Port B pins also can be
configured to function as external interrupts. See
7.4 Port B
.
1.7.10 Port C I/O Pins (PC7
–
PC0)
These eight I/O pins comprise port C, a general-purpose, bidirectional
I/O port. The pins are programmable as either inputs or outputs under
software control of the data direction registers. PC7 has a high current
sink and source capability. See
7.5 Port C
.
1.7.11 Port D I/O Pins (PD7 and PD5
–
PD0)
These seven lines comprise port D, a fixed input port. All special
functions that are enabled (SPI and SCI) affect this port. See
7.6 Port D
.