mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 105

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

8.6.1 PLL Control Register (PCTL)
MC68HC908LD64
Freescale Semiconductor
NOTE:
—
Rev. 3.0
Address:
The PLL control register contains the interrupt enable and flag bits, the
on/off switch, and the base clock selector bit.
PLLIE — PLL Interrupt Enable Bit
PLLF — PLL Interrupt Flag Bit
The PLLF bit should not be inadvertently cleared. 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 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 is set also. PLLF
always reads as 0 when the AUTO bit in the PLL bandwidth control
register (PBWC) is clear. The PLLF bit should be cleared by reading
the PLL control register. Reset clears the PLLF bit.
1 = PLL interrupts enabled
0 = PLL interrupts disabled
1 = Change in lock condition
0 = No change in lock condition
$0038
PLLIE
Bit 7
0
Clock Generator Module (CGM)
Figure 8-3. PLL Control Register (PCTL)
= Unimplemented
PLLF
6
0
PLLON
5
1
BCS
4
0
3
1
1
Clock Generator Module (CGM)
2
1
1
CGM I/O Registers
1
1
1
Data Sheet
Bit 0
1
1
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