MC68HC708MP16 Datasheet, PDF (114/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Clock Generator Module (CGM)
SIMOSCEN
OSC1
R_B
X₁
C₁
CGMXCLK
OSC2
R_S^*
V_SS
C₂
CGMXFC
C_F
V_DDA
V_DD
C_BYP
*R_S can be zero (shorted) when used with higher-frequency crystals. Refer to manufacturer’s data.
Figure 8-3. CGM External Connections
8.5 I/O Signals
The following paragraphs describe the CGM I/O signals.
8.5.1 Crystal Amplifier Input Pin (OSC1)
The OSC1 pin is an input to the crystal oscillator amplifier.
8.5.2 Crystal Amplifier Output Pin (OSC2)
The OSC2 pin is the output of the crystal oscillator inverting amplifier.
8.5.3 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.
Technical Data
114
Clock Generator Module (CGM)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor