MC68HC908MR8 Datasheet, PDF (35/372 Pages) Motorola, Inc – Microcontrollers

General Description
Pin Assignments
1.5.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. See Section 16. External
Interrupt (IRQ).
1.5.5 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) and the analog-to-digital converter
(ADC). Decoupling of these pins should be per the digital supply. See
Section 8. Clock Generator Module (CGM) and Section 18.
Analog-to-Digital Converter (ADC).
1.5.6 ADC Reference Voltage Input Pin (V_REFH)
V_REFH is the power supply input for setting the reference voltage. See
Section 18. Analog-to-Digital Converter (ADC).
1.5.7 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See
Section 8. Clock Generator Module (CGM).
1.5.8 Port A Input/Output (I/O) Pins (PTA6/ATD6–PTA0/ATD0)
Port A is a 7-bit special function port, sharing all of its pins with the
analog-to-digital converter (ADC). On the 32-pin QFP package, all seven
bits (PTA6/ATD6–PTA0/ATD0) of the port are available. On the 28-pin
package, four bits (PTA3/ATD3–PTA0/ATD0) are available.
PTA3–PTA0 have high current source and sink capability. See
Section 14. Input/Output (I/O) Ports.
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
General Description
Technical Data
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