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MC68HC08AZ60A Datasheet, PDF (151/480 Pages) Motorola, Inc – Microcontrollers
SIMOSCEN
Clock Generator Module (CGM)
I/O Signals
CGMXCLK
RS*
RB
X1
C1
C2
VDD
CF
CBYP
*RS can be 0 (shorted) when used with higher-frequency crystals. Refer to manufacturer’s data.
Figure 9-3. CGM External Connections
9.5 I/O Signals
The following paragraphs describe the CGM input/output (I/O) signals.
9.5.1 Crystal Amplifier Input Pin (OSC1)
The OSC1 pin is an input to the crystal oscillator amplifier.
9.5.2 Crystal Amplifier Output Pin (OSC2)
The OSC2 pin is the output of the crystal oscillator inverting amplifier.
9.5.3 External Filter Capacitor Pin (CGMXFC)
The CGMXFC pin is required by the loop filter to filter out phase
corrections. A small external capacitor is connected to this pin.
NOTE:
To prevent noise problems, CF should be placed as close to the
CGMXFC pin as possible with minimum routing distances and no routing
of other signals across the CF connection.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Clock Generator Module (CGM)
Advance Information
151