mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 125
mc68hc908sr12
Manufacturer Part Number
mc68hc908sr12
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908SR12.pdf
(404 pages)
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8.4.9 CGM External Connections
8.5 I/O Signals
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
In its typical configuration, the CGM requires up to four external
components.
Figure 8-3
Care should be taken with PCB routing in order to minimize signal cross
talk and noise. (See
routing information, filter network and its effects on PLL performance.)
The following paragraphs describe the CGM I/O signals.
•
•
Note: Filter network in box can be replaced with a 0.47µF capacitor, but will degrade stability.
Bypass capacitor, C
Filter network
Clock Generator Module (CGM)
shows the external components for the PLL:
MCU
Figure 8-3. CGM External Connections
0.033 µF
8.9 Acquisition/Lock Time Specifications
10 kΩ
BYP
CGMXFC
0.01 µF
Clock Generator Module (CGM)
V
SSA
V
DDA
C
0.1 µF
BYP
V
DD
Data Sheet
I/O Signals
for
125
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