mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 41

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

3.3.5 V
3.3.6 XFC
3.3.7 V
MC68HC912DG128 — Rev 3.0
MOTOROLA
DDPLL
FP
NOTE:
, V
SSPLL
Provides operating voltage and ground for the Phase-Locked Loop. This
allows the supply voltage to the PLL to be bypassed independently.
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.
PLL loop filter. Please see
information on how to calculate PLL loop filter elements. Any current
leakage on this pin must be avoided.
If VDDPLL is connected to VSS (this is normal case), then the XFC pin
should either be left floating or connected to VSS (never to VDD). If
VDDPLL is tied to VDD but the PLL is switched off (PLLON bit cleared),
then the XFC pin should be connected preferably to VDDPLL (i.e. ready
for VCO minimum frequency).
Flash EEPROM program/erase voltage and supply voltage during
normal operation.
Freescale Semiconductor, Inc.
For More Information On This Product,
Pinout and Signal Descriptions
Go to: www.freescale.com
Figure 3-3. PLL Loop FIlter Connections
MCU
Appendix: CGM Practical Aspects
XFC
C
VDDPLL
R
0
0
Pinout and Signal Descriptions
C
p
Power Supply Pins
Technical Data
for
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