mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 253

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

13.4.4 External Filter Capacitor Pins (CGMXFC1, CGMXFC2)
13.4.5 CGM Clock Output Pins (CGMOUT1, CGMOUT2)
13.5 CGMXFC External Connections
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
The CGMXFC1 and CGMXFC2 pins are required by the loop filter to
filter out phase corrections for each PLL. An external filter network is
connected to each pin. (See
CGMOUT1 and CGMOUT2 are VCO output signals. The output signals
are buffered through logic stages to output pins without degrading the
loop performance.
The external filter network is critical to the stability and reaction time of
the PLL. The configurations shown in
recommended for connection to CGMXFC1 and CGMXFC2.
Clock Generator Module (CGM)
56 kΩ
Figure 13-4. CGMXFC External Connections
2n2F
CGMXFC1
(a)
V
SSA0
150 pF
13.5 CGMXFC External
Figure 13-4
56 kΩ
2n2F
CGMXFC2
Clock Generator Module (CGM)
(b)
V
(a) and (b) are
SSA1
Connections.)
150 pF
Technical Data
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