248
Chapter 9
Clock Generator
Preliminary User’s Manual U15839EE1V0UM00
9.3.6 SSCG Frequency Modulation Control Register (SCFMC)
This is a 5-bit register that controls the frequency modulation of SSCG in dithering mode and the post
scale factor of the SSCG.
This register can be read or written in 8- or 1-bit units.
Figure 9-7:
SSCG Frequency Modulation Control Register (SCFMC)
Cautions: 1. This register can only be written if the SSCG enable bit SCEN is cleared.
2. After the first initialization of the SCFMC register, no further write access is
allowed until the occurrence of a Reset or the release of a power-save mode hap-
pened. Afterwards a power-save mode has been released, one bit is allowed to be
changed.
7
6
5
4
3
2
1
0
Address
Initial
value
SCFMC
0
SCPS1
SCPS0
SCFMC4
SCFMC3
SCFMC2
SCFMC1
SCFMC0
FFFFF82AH
0AH
Bit name
Function
SCPS1,
SCPS0
Frequency modulation control bits
SCPS1 SCPS0
Post Scale Factor of the SSCG
0
0
f
XX
/3
Note: If SSCG operation is required for the CPU/BCU clock supply, the setting
of the bits SCPS0, SCPS1 = 0x00 is not supported at any time.
Therefore, the setting of these bits must be modified before the SSCG is
enabled.
0
1
f
XX
/4
1
0
f
XX
/6
1
1
f
XX
/8
SCFMC4
to
SCFMC0
Specifies the dithering frequency
The initial setting (0x0A) of these bits must not be changed at any time.
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