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參數(shù)資料
| 型號： | CY28347ZC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Universal Single-chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| 中文描述： | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 封裝： | 6 X 14 MM, TSSOP-56 |
| 文件頁數(shù)： | 8/22頁 |
| 文件大小： | 188K |
| 代理商： | CY28347ZC |
CY28347
Document #: 38-07352 Rev. *C
Page 8 of 22
Dial-a-Frequency Feature
SMBus Dial-a-frequency feature is available in this device via
Byte7 and Byte9.
P is a PLL constant that depends on the frequency selection
prior to accessing the Dial-a-Frequency feature.
Spread Spectrum Clock Generation (SSCG)
Spread Spectrum is enabled/disabled via SMBus register Byte
1, Bit 6.
Byte 8: Silicon Signature Register (all bits are Read-only)
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
0
1
0
0
0
Name
Description
Revision_ID3
Revision_ID2
Revision_ID1
Revision_ID0
Vender_ID3
Vender_ID2
Vender_ID1
Vender_ID0
Revision ID bit [3]
Revision ID bit [2]
Revision ID bit [1]
Revision ID bit [0]
Cypress
’
s Vendor ID bit [3]
Cypress
’
s VendorID bit [2]
Cypress
’
s Vendor ID bit [1]
Cypress
’
s Vendor ID bit [0]
Byte9: Dial-A-Frequency Control Register R
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
0
0
0
0
0
Name
Description
Reserved
These bits are for programming the PLL
’
s internal R register. This access allows
the user to modify the CPU frequency at very high resolution (accuracy). All other
synchronous clocks (clocks that are generated from the same PLL, such as PCI)
remain at their existing ratios relative to the CPU clock.
R5, MSB
R4
R3
R2
R1
R0
DAF_ENB
R and N register mux selection. 0=R and N values come from the ROM. 1=data is
load from DAF (I2C) registers.
FS(4:0)
P
XXXXX
96016000
Table 9. Spread Spectrum Table
Mode
SST1
SST0
% Spread
0
0
0
–
1.5%
0
0
1
–
1.0%
0
1
0
–
0.7%
0
1
1
–
0.5%
1
0
0
±0.75%
1
0
1
±0.5%
1
1
0
±0.35%
1
1
1
±0.25%
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY28347ZCT | Universal Single-chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28347OC | Universal Single-chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28347OCT | Universal Single-chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28349B | FTG for Intel Pentium 4 CPU and Chipsets |
| CY28349BOC | FTG for Intel Pentium 4 CPU and Chipsets |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28347ZCT | 制造商:Rochester Electronics LLC 功能描述:FTG FOR VIA P4 CHIPSET - Tape and Reel |
| CY28349 | 制造商:SPECTRALINEAR 制造商全稱:SPECTRALINEAR 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
| CY28349B | 制造商:SPECTRALINEAR 制造商全稱:SPECTRALINEAR 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
| CY28349B_05 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
| CY28349BOC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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