MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 139

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

8.4.2 Phase-Locked Loop Circuit (PLL)
8.4.2.1 Circuits
68HC908AZ32A — Rev 0.0
MOTOROLA
PLL Programming Register (PPG)
PLL Bandwidth Control Register
PLL Control Register (PCTL)
Register Name
(PBWC)
The PLL is a frequency generator that can operate in either acquisition
mode or tracking mode, depending on the accuracy of the output
frequency. The PLL can change between acquisition and tracking
modes either automatically or manually.
The PLL consists of these circuits:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Table 8-1. I/O Register Address Summary
Register
Address
Freescale Semiconductor, Inc.
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For More Information On This Product,
Figure 8-2. I/O Register Summary
Voltage-controlled oscillator (VCO)
Modulo VCO frequency divider
Phase detector
Loop filter
Lock detector
PLLIE
AUTO
MUL7
Bit 7
0
0
0
Clock Generator Module (CGM)
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$001C
PCTL
= Unimplemented
LOCK
MUL6
PLLF
6
0
0
1
PLLON
MUL5
ACQ
5
1
0
1
PBWC
$001D
MUL4
BCS
XLD
4
0
0
0
$001E
PPG
VRS7
3
1
1
0
0
0
Clock Generator Module (CGM)
VRS6
2
1
1
0
0
1
Functional Description
Advance Information
VRS5
1
1
1
0
0
1
Bit 0
VRS4
1
1
0
0
0
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