XC68HC705F32 Motorola, XC68HC705F32 Datasheet - Page 34

• Manufacturer Part Number: XC68HC705F32
• Description: MICROCONTROLLER
• Manufacturer: Motorola

2
2.5
There is also an 80-pin version of the MC68HC05F32. As it has fewer pins and fewer modules,
some of the pin descriptions vary. The reduction of the I/O count means that there is no longer a
port H and that port C has only three pins available for use, one of which is shared with the timer
(TCAP3). Port D’s pins were shared with the A/D converter, but this can no longer be used.
2.5.1
The three I/O lines of port C are configured as inputs during reset and each one has an internal
pull-up resistor. Pin PC0 is shared with one of the timer’s input captures (TCAP3).
2.5.2
All eight port D lines are configured as inputs during reset. These pins are open drain outputs
which means that each one requires an external pull-up resistor when it is used as an output.
MOTOROLA
2-10
Alternative pin descriptions for the 80-pin QFP package
PC5, PC4, PC0/TACP3
PD7–PD0
MODES OF OPERATION AND PIN DESCRIPTIONS
MC68HC05F32