Freescale Semiconductor, Inc.
General Description
1.5.2 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit. See Section 10. Clock Generator Module (CGM).
1.5.3 External Reset Pin (RST)
A logic 0 on the RST pin forces the MCU to a known startup state. RST
is bidirectional, allowing a reset of the entire system. It is driven low when
any internal reset source is asserted. See Section 9. System
Integration Module (SIM) for more information.
1.5.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. See Section 16. External
Interrupt Module (IRQ).
1.5.5 Analog Power Supply Pin (VDDA
)
VDDA is the power supply pin for the analog portion of the chip. This pin
will supply both the clock generator module (CGM) and the
analog-to-digital converter (ADC). See Section 10. Clock Generator
Module (CGM), and Section 23. Analog-to-Digital Converter
(ADC-15).
1.5.6 Analog Ground Pin (VSSA
)
The VSSA analog ground pin is used only for the ground connections for
the analog sections of the circuit and should be decoupled as per the
VSS digital ground pin. The analog sections consist of a clock generator
module (CGM) and an analog-to-digital converter (ADC). See
Section 10. Clock Generator Module (CGM) and Section 23.
Analog-to-Digital Converter (ADC-15).
Technical Data
MC68HC908AS60 — Rev. 1.0
General Description
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