Datasheet

Pinout and Signal Descriptions
Technical Data MC68HC912DT128A — Rev 4.0
46 Pinout and Signal Descriptions MOTOROLA
3.3.5 V
DDPLL
, V
SSPLL
Provides operating voltage and ground for the Phase-Locked Loop. This
allows the supply voltage to the PLL to be bypassed independently.
NOTE: The VSSPLL pin should always be grounded even if the PLL is not used.
The VDDPLL pin should not be left floating. It is recommended to
connect the VDDPLL pin to ground if the PLL is not used.
3.3.6 XFC
PLL loop filter. Please see Appendix: CGM Practical Aspects for
information on how to calculate PLL loop filter elements. Any current
leakage on this pin must be avoided.
Figure 3-4. PLL Loop FIlter Connections
MCU
XFC
R
0
C
0
C
a
VDDPLL
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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