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MC9S08AW60CPUE Datasheet, PDF (137/324 Pages) Freescale Semiconductor, Inc – MC9S08AW60 Features | |||
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8.3.2 ICG Control Register 2 (ICGC2)
Chapter 8 Internal Clock Generator (S08ICGV4)
7
6
5
4
3
2
1
0
R
LOLRE
W
MFD
LOCRE
RFD
Reset
0
0
0
0
0
0
0
0
Figure 8-7. ICG Control Register 2 (ICGC2)
Table 8-2. ICGC2 Register Field Descriptions
Field
7
LOLRE
6:4
MFD
3
LOCRE
2:0
RFD
Description
Loss of Lock Reset Enable â The LOLRE bit determines what type of request is made by the ICG following a
loss of lock indication. The LOLRE bit only has an effect when LOLS is set.
0 Generate an interrupt request on loss of lock.
1 Generate a reset request on loss of lock.
Multiplication Factor â The MFD bits control the programmable multiplication factor in the FLL loop. The value
speciï¬ed by the MFD bits establishes the multiplication factor (N) applied to the reference frequency. Writes to
the MFD bits will not take effect if a previous write is not complete. Select a low enough value for N such that
fICGDCLK does not exceed its maximum speciï¬ed value.
000 Multiplication factor = 4
001 Multiplication factor = 6
010 Multiplication factor = 8
011 Multiplication factor = 10
100 Multiplication factor = 12
101 Multiplication factor = 14
110 Multiplication factor = 16
111 Multiplication factor = 18
Loss of Clock Reset Enable â The LOCRE bit determines how the system manages a loss of clock condition.
0 Generate an interrupt request on loss of clock.
1 Generate a reset request on loss of clock.
Reduced Frequency Divider â The RFD bits control the value of the divider following the clock select circuitry.
The value speciï¬ed by the RFD bits establishes the division factor (R) applied to the selected output clock source.
Writes to the RFD bits will not take effect if a previous write is not complete.
000 Division factor = 1
001 Division factor = 2
010 Division factor = 4
011 Division factor = 8
100 Division factor = 16
101 Division factor = 32
110 Division factor = 64
111 Division factor = 128
MC9S08AW60 Data Sheet, Rev 2
Freescale Semiconductor
137
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