mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 107
mc68hc708mp16
Manufacturer Part Number
mc68hc708mp16
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC708MP16.pdf
(398 pages)
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8.4.2 Phase-Locked Loop Circuit (PLL)
8.4.2.1 PLL Circuits
MC68HC708MP16
Freescale Semiconductor
Addr.
$FE0B
$FE0C
$FE0D
PLL Programming Register
PLL Bandwidth Control
PLL Control Register
Name
Register (PBWC)
—
Rev. 3.1
(PCTL)
(PPG)
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 the following circuits:
•
•
•
•
•
Figure 8-2. CGM I/O Register Summary
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read: MUL7
Write:
Voltage-controlled oscillator (VCO)
Modulo VCO frequency divider
Phase detector
Loop filter
Lock detector
Clock Generator Module (CGM)
PLLIE
AUTO
Bit 7
0
0
0
= Unimplemented
LOCK
MUL6
PLLF
6
0
0
1
PLLON
MUL5
ACQ
5
1
0
1
MUL4
BCS
XLD
4
0
0
0
VRS7
3
1
1
0
0
0
Clock Generator Module (CGM)
VRS6
2
1
1
0
0
1
VRS5
Technical Data
1
1
1
0
0
1
Bit 0
VRS4
1
1
0
0
0
107
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