Rainbow Electronics W90N745CDG User Manual
Page 54
W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
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49
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Revision
A2
PLL Control Register 1（PLLCON1）
W90N745 provides extra PLL to provide 12.288/16.934 MHz clock source to Audio Controller. It uses the
same 15MHz crystal clock input source with system PLL mentioned above.
REGISTER ADDRESS
R/W
DESCRIPTION
RESET
VALUE
PLLCON1 0xFFF0_0010 R/W
PLL Control Register 1
0x0001_0000
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED PWDEN1
15
14
13
12
11
10
9
8
FBDV1
7
6
5
4
3
2
1
0
FBDV1 OTDV1
INDV1
BITS
DESCRIPTION
[31:17] RESERVED
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[16] PWDEN1
PLL1 power down enable
0 = PLL1 is in normal mode
1 = PLL1 is in power down mode (default)
[15:7] FBDV1
PLL1 VCO output clock feedback divider
Feedback Divider divides the output clock from VCO of PLL1.
[6:5] OTDV1
PLL1 output clock divider
OTDV1 [6:5]
Divided by
0 0
1
0 1
2
1 0
2
1 1
4
[4:0]
INDV1
PLL1 input clock divider
Input divider divides the input reference clock into the PLL1.