mc68hc912d60c Freescale Semiconductor, Inc, mc68hc912d60c Datasheet - Page 445

• Manufacturer Part Number: mc68hc912d60c
• Description: Hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

23.7 PLL
MC68HC912D60A — Rev. 3.1
Freescale SemiconductorAppendix: Information on MC68HC912D60A Mask Set Changes
The limp Home clock frequency has been re-alligned to the specification
values to reduce sensitivity to system noise and hence reduce PLL jitter.
Note: It is advisable to verify the XFC filter components and PLL lock
time due to the above changes.
VCO start-up will now be at the minimum frequency whilst the power up
sequence of the current controlled oscillator has been improved.
The XFC pin is now preconditioned to VDDPLL when PLL is deselected
so XFC doesn’t float. This ensures the PLL starts up at low frequency
and ramps up to the desired frequency.
Appendix: Information on MC68HC912D60A Mask Set Changes
Technical Data
PLL
445