Motorola MC68HC908AB32 User Manual

General Description
Pin Functions
MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA General Description 35
1.6.2 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit. See Section 9. Clock Generator Module (CGM).
1.6.3 External Reset Pin (RST
)
A logic 0 on the RST
pin forces the MCU to a known start-up state. RST
is bidirectional, allowing a reset of the entire system. It is driven low when
any internal reset source is asserted. This pin contains an internal pullup
resistor. See Section 8. System Integration Module (SIM).
1.6.4 External Interrupt Pin (IRQ
)
IRQ
is an asynchronous external interrupt pin. This pin contains an
internal pullup resistor. See Section 18. External Interrupt (IRQ).
1.6.5 Analog Power Supply Pin (V
DDA
)
V
DDA
is the power supply pin for the clock generator module (CGM).
1.6.6 Analog Ground Pin (V
SSA
)
The V
SSA
analog ground pin is used only for the ground connections for
the clock generator module (CGM) section of the circuit and should be
decoupled as per the V
SS
digital ground pin. See Section 9. Clock
Generator Module (CGM).
1.6.7 Analog Ground Pin (A
VSS
/VREFL)
The A
VSS
analog ground pin is used only for the ground connections for
the analog to digital convertor (ADC) and should be decoupled as per
the V
SS
digital ground pin.

Motorola MC68HC908AB32 Specifications

General

Brand	Motorola
Model	MC68HC908AB32
Category	Controller
Language	English