mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 25

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1.5.5 CGM Power Supply Pins (V
V
Decoupling of these pins should be as per the digital supply. See
(CGM).
1.5.6 External Filter Capacitor Pin (V
CGMXFC is an external filter capacitor connection for the CGM. See
(CGM).
1.5.7 ADC Power Supply/Reference Pins (V
V
are the reference voltage pins for the ADC. V
the V
V
to the same voltage potential as V
1.5.8 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 9 Keyboard Interrupt 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.
1.5.9 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
Converter
1.5.10 Port C I/O Pins (PTC6–PTC0)
PTC6 and PTC5 are general-purpose, bidirectional I/O port pins. PTC4–PTC0 are general-purpose,
bidirectional I/O port pins that contain higher current sink/source capability. See
Ports
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.
1.5.11 Port D I/O Pins (PTD7/T2CH1–PTD0/SS)
PTD7–PTD0 are special-function, bidirectional I/O port pins. PTD3–PTD0 can be programmed to be
serial peripheral interface (SPI) pins, while PTD7–PTD4 can be individually programmed to be timer
interface module (TIM1 and TIM2) pins. See
Peripheral Interface (SPI)
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.
Freescale Semiconductor
DDA
DDAD
REFL
DDAD
and V
(PORTS).
is the low reference supply for the ADC, and by default the V
and V
/V
(ADC).
SSA
REFH
SSAD
are the power supply pins for the analog portion of the clock generator module (CGM).
pin should be externally filtered and connected to the same voltage potential as V
are the power supply pins to the analog-to-digital converter (ADC). V
Module, and
Chapter 12 Input/Output Ports (PORTS)
SS
MC68HC908GR16 Data Sheet, Rev. 5.0
. See
(KBI).
DDA
Chapter 12 Input/Output Ports
Chapter 3 Analog-to-Digital Converter
CGMXFC
and V
REFH
Chapter 18 Timer Interface Module
is the high reference supply for the ADC, and by default
SSA
DDAD
)
Chapter 12 Input/Output Ports (PORTS)
)
/V
REFH
and V
Chapter 4 Clock Generator Module
SSAD
Chapter 4 Clock Generator Module
and
(PORTS).
SSAD
/V
REFL
Chapter 3 Analog-to-Digital
/V
pin should be connected
Chapter 12 Input/Output
(TIM),
REFL
(ADC).
)
Chapter 16 Serial
REFH
Pin Functions
and V
and
REFL
DD
25
.