MC68HC908GP20 Datasheet, PDF (39/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

1.6.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. This pin contains an
internal pullup resistor. See Section 12. External Interrupt (IRQ).
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). Decoupling of these pins should be as
per the digital supply. See Section 7. Clock Generator Module
(CGMC).
1.6.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See
Section 7. Clock Generator Module (CGMC).
1.6.7 Analog Power Supply Pins (V_DDAD and V_SSAD)
V_DDAD and V_SSAD are the power supply pins for the analog-to-digital
converter. Decoupling of these pins should be as per the digital supply.
See Section 5. Analog-to-Digital Converter (ADC).
1.6.8 ADC Voltage Reference High Pin (V_REFH)
V_REFH is the high reference supply for the ADC. Connect the V_REFH pin
to the same voltage potential as V_DDAD. See Section 5. Analog-to-
Digital Converter (ADC).
1.6.9 ADC Voltage Reference Low Pin (V_REFL)
V_REFL is the low reference supply for the ADC. Connect the V_REFL pin to
the same voltage potential as V_SSAD. See Section 5. Analog-to-Digital
Converter (ADC).
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
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