MC68HC908KX8 Datasheet, PDF (129/310 Pages) Motorola, Inc – Microcontrollers

Internal Clock Generator Module (ICG)
Input/Output (I/O) Registers
7.8 Input/Output (I/O) Registers
The ICG contains five registers, summarized in Figure 7-10. These
registers are:
1. ICG control register (ICGCR)
2. ICG multiplier register (ICGMR)
3. ICG trim register (ICGTR)
4. ICG DCO divider control register (ICGDVR)
5. ICG DCO stage control register (ICGDSR)
Several of the bits in these registers have interaction where the state of
one bit may force another bit to a particular state or prevent another bit
from being set or cleared. A summary of this interaction is shown in
Table 7-4.
Addr.
Register Name
Bit 7
6
5
$0036
ICG Control Register ^Read:
(ICGCR) Write:
See page 131. _Reset:
CMIE
0
CMF
CMON
0*
0
0
*See 7.8.1 ICG Control Register for method of clearing the CMF bit.
$0037
ICG Multiply Register ^Read:
(ICGMR) Write:
See page 133. _{Reset: 0}
N6
N5
0
0
$0038
ICG Trim Register ^Read:
(ICGTR) Write:
See page 134. _Reset:
TRIM7
1
TRIM6
0
TRIM5
0
ICG Divider Control ^Read:
$0039
Register (ICGDVR) Write:
See page 134. _{Reset: 0}
0
0
$003A
ICG DCO Stage Control ^Read:
Register (ICGDSR) Write:
See page 135. _Reset:
DSTG7
R
U
DSTG6
R
U
DSTG5
R
U
= Unimplemented
4
3
2
1
Bit 0
ICGS
ECGS
CS ICGON
ECGON
0
1
0
0
0
N4
N3
N2
N1
N0
1
0
1
0
1
TRIM4 TRIM3 TRIM2 TRIM1 TRIM0
0
0
0
0
0
DDIV3 DDIV2 DDIV1 DDIV0
0
U
U
U
U
DSTG4 DSTG3 DSTG2 DSTG1 DSTG0
R
R
R
R
R
U
U
U
U
U
R = Reserved
U = Unaffected
Figure 7-10. ICG Module I/O Register Summary
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
Internal Clock Generator Module (ICG)
Technical Data
129