MC908AB32CFUE Datasheet, PDF (35/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
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.
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
General Description
Technical Data
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