Freescale Semiconductor, Inc.
Internal Clock Generator Module (ICG)
I/O Registers
Addr.
Register Name
Bit 7
6
5
4
3
ICGON
1
2
1
Bit 0
Read:
CMF
ICGS
ECGS
Internal Clock Generator
Control Register Write:
(ICGCR) See page 139.
CMIE
CMON
CS
ECGON
$0036
Reset:
Read:
0
0
0
0
0
N2
0
N1
0
N0
Internal Clock Generator
Multiplier Register Write:
(ICGMR) See page 141.
R
N6
N5
N4
N3
$0037
$0038
$0039
$003A
Reset:
Read:
0
0
0
1
0
1
0
1
Internal Clock Generator
Trim Register (ICGTR) Write:
TRIM7
TRIM6
TRIM5
TRIM4
TRIM3
0
TRIM2
0
TRIM1
0
TRIM0
0
See page 142.
Reset:
1
0
0
0
Read:
ICG DCO Divider Control
R
0
R
0
R
0
R
0
DDIV3
U
DDIV2
U
DDIV1
U
DDIV0
U
Register (ICGDVR) Write:
See page 143.
Reset:
Read:
DSTG7
DSTG6
DSTG5
DSTG4
DSTG3
DSTG2
DSTG1
DSTG0
ICG DCO Stage Register
Write:
(ICGDSR) See page 144.
Reset:
Unaffected by reset
= Reserved
= Unimplemented
R
U = Unaffected
Figure 8-10. ICG I/O Register Summary
MC68HC908RFRK2
MOTOROLA
AdvanceInformation
137
Internal Clock Generator Module (ICG)
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