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HD151TS206SS датащи(PDF) 16 Page - Renesas Technology Corp

номер детали HD151TS206SS
подробное описание детали  Mother Board Clock Generator for Intel P4 Chipset (Springdale)
PDF  34 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD151TS206SS датащи(HTML) 16 Page - Renesas Technology Corp

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HD151TS206SS
Rev.1.00, Apr.28.2003, page 16 of 34
I
2C Controlled Register Bit Map (cont.)
How to set VCO2 frequency to 666 MHz.
0001
011
0
ON
Write
Byte17
6
0110
0110
Byte18
6
6
max 720
min 200
How to read actual frequency of VCO2 and CPU clock
0110
1000
Byte20
8
6
0110
0110
Byte17[4] = 1
Actual VCO2 freq. read back.
Byte19
6
6
Note:
Case of VCO2 = 666.8 MHz.
Other clock frequency are able to read using the same way as shown at upper.
Byte19, Byte20 = Read back of VCO2 actual frequency.
Byte21, Byte22 = Read back of CPU actual frequency.
Byte19 Control Register
Bit
Description
Contents
Type
Default
Note
7
VCO2 Frequency Read
Bit15
R0
6
VCO2 Frequency Read
Bit14
R0
5
VCO2 Frequency Read
Bit13
R0
4
VCO2 Frequency Read
Bit12
Calculation result of VCO2 frequency.
100 MHz digit
0000 = 0, 0001 = 1 …. 1001 = 9
R0
3
VCO2 Frequency Read
Bit11
R0
2
VCO2 Frequency Read
Bit10
R0
1
VCO2 Frequency Read Bit9
R
0
0
VCO2 Frequency Read Bit8
Calculation result of VCO2 frequency.
10 MHz digit
0000 = 0, 0001 = 1 …. 1001 = 9
R0



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