Power, Reset, and Clock Management
8.1.12.2.31 CM_SSC_MODFREQDIV_DPLL_PER Register (offset = 78h) [reset = 0h]
CM_SSC_MODFREQDIV_DPLL_PER is shown in
and described in
Control the Modulation Frequency (Fm) for Spread Spectrum Clocking technique by defining it as a ratio
of DPLL_REFCLK/4 Fm = [DPLL_REFCLK/4]/MODFREQDIV MODFREQDIV =
MODFREQDIV_MANTISSA * 2^MODFREQDIV_EXPONENT [warm reset insensitive]
Figure 8-114. CM_SSC_MODFREQDIV_DPLL_PER Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
R-0h
15
14
13
12
11
10
9
8
Reserved
MODFREQDIV_EXPONENT
R-0h
R/W-0h
7
6
5
4
3
2
1
0
Reserved
MODFREQDIV_MANTISSA
R-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 8-122. CM_SSC_MODFREQDIV_DPLL_PER Register Field Descriptions
Bit
Field
Type
Reset
Description
31-11
Reserved
R
0h
10-8
MODFREQDIV_EXPONE
R/W
0h
Set the Exponent component of MODFREQDIV factor
NT
7
Reserved
R
0h
6-0
MODFREQDIV_MANTISS R/W
0h
Set the Mantissa component of MODFREQDIV factor
A
646
Power, Reset, and Clock Management (PRCM)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated