MC68HC08GP32A Datasheet, PDF (25/258 Pages) Freescale Semiconductor, Inc – Microcontrollers

Pin Functions
1.6.5 CGM Power Supply Pins (V_DDA and V_SSA)
V_DDA and V_SSA are the power supply pins for the analog portion of the clock generator module (CGM).
Connect the V_DDA pin to the same voltage potential as V_DD, and the V_SSA pin to the same voltage
potential as V_SS. Decoupling of these pins should be as per the digital supply. See Chapter 4 Clock
Generator Module (CGM)
1.6.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See Chapter 4 Clock Generator Module
(CGM)
1.6.7 ADC Power Supply/Reference Pins (V_DDAD/V_REFH and V_SSAD/V_REFL)
V_DDAD and V_SSAD are the power supply pins for the analog-to-digital converter (ADC). Connect the V_DDAD
pin to the same voltage potential as V_DD, and the V_SSAD pin to the same voltage potential as V_SS.
Decoupling of these pins should be as per the digital supply. See Chapter 3 Analog-to-Digital Converter
(ADC).
V_REFH is the high reference supply for the ADC, and is internally connected to V_DDAD. V_REFL is the low
reference supply for the ADC, and is internally connected to V_SSAD.
1.6.8 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 Chapter 12 Input/Output (I/O) Ports and Chapter 8
Keyboard Interrupt (KBI) Module.
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.
1.6.9 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 Chapter 12 Input/Output (I/O) Ports and Chapter 3 Analog-to-Digital
Converter (ADC).
1.6.10 Port C I/O Pins (PTC6–PTC0)
PTC6–PTC0 are general-purpose, bidirectional I/O port pins. See Chapter 12 Input/Output (I/O) Ports.
PTC5 and PTC6 are only available on 44-pin QFP package.
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 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 Chapter 18 Timer Interface Modules (TIM1 and TIM2),
Chapter 16 Serial Peripheral Interface (SPI) Module, and Chapter 12 Input/Output (I/O) Ports.
MC68HC08GP32A • MC68HC08GP16A Data Sheet, Rev. 1.0
Freescale Semiconductor
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