
General Description
MC68HC908AZ32A Data Sheet, Rev. 2
24
Freescale Semiconductor
1.4.6 Analog Ground Pin (VSSA)
VSSA is the ground connection for the analog portion of the Clock Generator Module (CGM). See
1.4.7 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the Clock Generator Module (CGM). See
1.4.8 ADC Analog Power Supply Pin (VDDAREF)
VDDAREF is the power supply pin for the analog portion of the Analog-to-Digital Converter (ADC). See
1.4.9 ADC Analog Ground Pin (AVSS/VREFL)
The AVSS/VREFL pin provides both the analog ground connection and the reference low voltage for the
1.4.10 ADC Reference High Voltage Pin (VREFH)
VREFH provides the reference high voltage for the Analog-to-Digital Converter (ADC). See Chapter 21 1.4.11 Port A Input/Output (I/O) Pins (PTA7–PTA0)
1.4.12 Port B I/O Pins (PTB7/ATD7–PTB0/ATD0)
Port B is an 8-bit special function port that shares all eight pins with the Analog-to-Digital Converter (ADC).
1.4.13 Port C I/O Pins (PTC5–PTC0)
PTC5–PTC3 and PTC1–PTC0 are general-purpose bidirectional I/O port pins. PTC2/MCLK is a special
function port that shares its pin with the system clock which has a frequency equivalent to the system
1.4.14 Port D I/O Pins (PTD7–PTD0/ATD8)
Port D is an 8-bit special-function port that shares seven of its pins with the Analog-to-Digital Converter
module (ADC-15), one of its pins with the Timer Interface Module A (TIMA), and one more of its pins with
1.4.15 Port E I/O Pins (PTE7/SPSCK–PTE0/TxD)
Port E is an 8-bit special function port that shares two of its pins with the Timer Interface Module A (TIMA),
four of its pins with the Serial Peripheral Interface module (SPI), and two of its pins with the Serial