MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 117

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

8.5.1 PLL Control Register
MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
Address:
The PLL control register (PCTL) contains the interrupt enable and flag
bits, the on/off switch, the base clock selector bit, the prescaler bits, and
the VCO power-of-two range selector bits.
PLLIE — PLL Interrupt Enable Bit
PLLF — PLL Interrupt Flag Bit
Do not inadvertently clear the PLLF bit. Any read or read-modify-write
operation on the PLL control register clears the PLLF bit.
Reset:
Read:
Write:
This read/write bit enables the PLL to generate an interrupt request
when the LOCK bit toggles, setting the PLL flag, PLLF. When the
AUTO bit in the PLL bandwidth control register (PBWC) is clear,
PLLIE cannot be written and reads as logic 0. Reset clears the PLLIE
bit.
This read-only bit is set whenever the LOCK bit toggles. PLLF
generates an interrupt request if the PLLIE bit also is set. PLLF
always reads as logic 0 when the AUTO bit in the PLL bandwidth
control register (PBWC) is clear. Clear the PLLF bit by reading the
PLL control register. Reset clears the PLLF bit.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = PLL interrupts enabled
0 = PLL interrupts disabled
1 = Change in lock condition
0 = No change in lock condition
$0036
PLLIE
Bit 7
0
Go to: www.freescale.com
Figure 8-4. PLL Control Register (PCTL)
= Unimplemented
PLLF
6
0
PLLON
5
1
BCS
4
0
PRE1
3
0
Clock Generator Module (CGM)
PRE0
2
0
VPR1
CGM Registers
1
0
Data Sheet
VPR0
Bit 0
0
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