MC68HC908GP20 Datasheet, PDF (40/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

1.6.10 Port A Input/Output (I/O) Pins (PTA7/KBD7–PTA0/KBD0)
PTA7–PTA0 are general-purpose, bidirectional I/O port pins. Any or all
of the port A pins can be programmed to serve as keyboard interrupt
pins. See Section 16. Input/Output (I/O) Ports and Section 13.
Keyboard Interrupt Module (KBI).
These port pins also have selectable pullups when configured for input
mode. The pullups are disengaged when configured for output mode.
The pullups are selectable on an individual port bit basis.
1.6.11 Port B I/O Pins (PTB7/AD7–PTB0/AD0)
PTB7–PTB0 are general-purpose, bidirectional I/O port pins that can
also be used for analog-to-digital converter (ADC) inputs. See Section
16. Input/Output (I/O) Ports and Section 5. Analog-to-Digital
Converter (ADC).
1.6.12 Port C I/O Pins (PTC6–PTC0)
PTC6–PTC0 are general-purpose, bidirectional I/O port pins. See
Section 16. Input/Output (I/O) Ports. PTC5 and PTC6 are only
available on 44-pin QFP packages.
These port pins also have selectable pullups when configured for input
mode. The pullups are disengaged when configured for output mode.
The pullups are selectable on an individual port bit basis.
1.6.13 Port D I/O Pins (PTD7/T2CH1–PTD0/SS)
PTD7–PTD0 are special-function, bidirectional I/O port pins.
PTD0–PTD3 can be programmed to be serial peripheral interface (SPI)
pins, while PTD4–PTD7 can be individually programmed to be timer
interface module (TIM1 and TIM2) pins. See Section 22. Timer
Interface Module (TIM), Section 20. Serial Peripheral Interface
Module (SPI), and Section 16. Input/Output (I/O) Ports. PTD6 and
PTD7 are only available on 44-pin QFP packages.
Advance Information
40
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor