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General Description
1.6.8 ADC Voltage Reference Pin (VREFH)
1.6.9 Analog Supply Pin (V
1.6.10 External Filter Capacitor Pin (CGMXFC)
1.6.11 Port A Input/Output (I/O) Pins (PTA7–PTA0)
1.6.12 Port B I/O Pins (PTB7/ATD7–PTB0/ATD0)
1.6.13 Port C I/O Pins (PTC5–PTC0)
Technical Data
36
VREFH is the power supply for setting the reference voltage VREFH.
Connect this pin to a voltage such that 1.5V < VREFH ≤ V
)
DDAREF
The V
analog supply pin is used only for the supply connections
DDAREF
for the analog-to-digital convertor (ADC).
CGMXFC is an external filter capacitor connection for the CGM. See
Section 9. Clock Generator Module
PTA7–PTA0 are general-purpose bidirectional I/O port pins. See
Section 17. Input/Output (I/O)
PTB7–PTB0 are special function, bidirectional port pins. PTB7–PTB0
are shared with the analog to digital convertor (ADC) input pins
ATD7–ATD0. See
Section 14. Analog-to-Digital Converter (ADC)
Section 17. Input/Output (I/O)
PTC5–PTC0 are general-purpose bidirectional I/O port pins. PTC2 is a
special function port pin that is shared with the system clock output pin,
MCLK. See
Section 17. Input/Output (I/O)
General Description
(CGM).
Ports.
Ports.
Ports.
MC68HC908AB32
.
DDAREF
and
Rev. 1.0
—
MOTOROLA
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