MC68HC908LJ12 Datasheet, PDF (40/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

General Description
1.6.3 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit. The OSC1 pin contains a schmitt-trigger and a spike filter for
improved EMC performance. See Section 7. Oscillator (OSC).
1.6.4 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. A schmitt-trigger and a spike filter
is associated with this pin so that the device is more robust to EMC
noise.This pin also contains an internal pullup resistor. See Section 9.
System Integration Module (SIM).
1.6.5 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. This pin contains an
internal pullup resistor. See Section 18. External Interrupt (IRQ).
1.6.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See
Section 8. Clock Generator Module (CGM).
1.6.7 ADC Voltage High Reference Pin (V_REFH)
V_REFH is the voltage input pin for the ADC voltage high reference. See
Section 15. Analog-to-Digital Converter (ADC)
1.6.8 ADC Voltage Low Reference Pin (V_REFL)
V_REFL is the voltage input pin for the ADC voltage low reference. See
Section 15. Analog-to-Digital Converter (ADC)
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor
General Description
Technical Data
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