cy28rs680 SpectraLinear Inc, cy28rs680 Datasheet - Page 15

• Manufacturer Part Number: cy28rs680
• Description: Clock Generator For Ati Rs5xx/6xx Chipsets
• Manufacturer: SpectraLinear Inc

Rev 1.0, March 28, 2007
Table 9.)Frequency Table for the SRC Clock PLLPLL
Table 8.)Frequency Table for the ATIG Clock (PCIEX PLL)
The SMBus register only requires changes to N[7:0]
NOTE: N[8] bit is hardwired to a logic "1".
Band
Freq
1
2
3
S.No
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
7
8
9
SEL1
376
380
384
389
393
398
402
407
411
416
420
425
429
434
438
443
447
452
456
460
465
469
474
478
483
487
492
496
501
505
510
N
0
1
X
Fsrc (MHz)
SEL0
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
0
0
1
ATIG o/p (MHz)
111.33 -167
100 -125
166 -256
N-Binary[7:0]
101111000
101111100
110000000
110000101
110001001
110001110
110010010
110010111
110011011
110100000
110100100
110101001
110101101
110110010
110110110
110111011
110111111
111000100
111001000
111001100
111010001
111010101
111011010
111011110
111100011
111100111
111101100
111110000
111110101
111111001
111111110
Range of N
167 -250
200 -250
167 -256
Fref = 14.31818MHz
M = 8 | O = 8
Comments
M | O(out div)
Fref = 240MHz
60 | 6
60 | 8
60 | 4
CY28RS680
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