Datasheet

Clocks and Reset Generator (CRG)
External Pin Descriptions
MC9S12DP256 — Revision 1.1
Clocks and Reset Generator (CRG)
Figure 42 Common Crystal Connections
Figure 43 External Oscillator Connections
Reset (RESET) RESET is an active low bidirectional control signal that acts as an input
to initialize the MCU to a known start-up state. It also acts as an
open-drain output to indicate that an internal failure has been detected
in either the crystal monitor or COP watchdog circuit. The MCU goes into
reset asynchronously and comes out of reset synchronously. This allows
the part to reach a proper reset state even if the clocks have failed, while
allowing synchronized operation when starting out of reset. See System
Reset Generator.
MCU
C
EXTAL
XTAL
Crystal or
VSSPLL
ceramic resonator
C
MCU
EXTAL
XTAL
CMOS-COMPATIBLE
EXTERNAL OSCILLATOR
NC
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