MC908MR16CFUE Datasheet, PDF (58/282 Pages) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

Clock Generator Module (CGM)
OSC2
CRYSTAL OSCILLATOR
OSC1
SIMOSCEN
CGMRDV
CLOCK
SELECT
÷2
CIRCUIT
CGMRCLK
BCS
V_DDA
CGMXFC
V_SS
VRS[7:4]
PHASE
DETECTOR
LOCK
DETECTOR
LOOP
FILTER
VOLTAGE
CONTROLLED
OSCILLATOR
PLL ANALOG
BANDWIDTH
CONTROL
INTERRUPT
CONTROL
CGMXCLK
TO SIM
A
B _S*
CGMOUT
TO SIM
*WHEN S = 1, CGMOUT = B
USER MODE
PTC2
MONITOR MODE
CGMINT
LOCK
AUTO ACQ
MUL[7:4]
PLLIE PLLF
Addr.
$005C
$005D
$005E
CGMVDV
FREQUENCY
DIVIDER
CGMVCLK
Figure 4-1. CGM Block Diagram
Register Name
Bit 7
6
5
4
3
PLL Control Register ^Read: _PLLIE
PLLF
PLLON
BCS
1
(PCTL) Write:
R
R
See page 66. _{Reset: 0}
0
1
0
1
PLL Bandwidth Control Register ^Read: _AUTO ^LOCK
ACQ
XLD
0
(PBWC) Write:
R
R
See page 67. _{Reset: 0}
0
0
0
0
PLL Programming Register ^Read:
(PPG) Write:
See page 68. _Reset:
MUL7
0
R
MUL6 MUL5
1
1
= Reserved
MUL4
0
VRS7
0
Figure 4-2. CGM I/O Register Summary
2
1
R
1
0
R
0
VRS6
1
1
1
R
1
0
R
0
VRS5
1
Bit 0
1
R
1
0
R
0
VRS4
0
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
58
Freescale Semiconductor