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C9812 Datasheet(PDF) 4 Page - Cypress Semiconductor

No. de Pieza. C9812
Descripción  Low EMI Clock Generator for Intel 810E Chipset Systems
Descarga  18 Pages
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Fabricante  CYPRESS [Cypress Semiconductor]
Página de inicio  http://www.cypress.com
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C9812 Datasheet(HTML) 4 Page - Cypress Semiconductor

 
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Low EMI Clock Generator for Intel
810E Chipset Systems
Cypress Semiconductor Corporation
525 Los Coches St.
Document#: 38-07053 Rev. **
05/03/01
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
Page 4 of 18
http://www.cypress.com
APPROVED PRODUCT
C9812
Clock Synchronization and Phase Alignment
This device incorporates IOAPIC clock synchronization. With this feature, the IOAPIC clocks are derived from the CPU
clock. The IOAPIC clock lags the CPU clock by the specified 1.5 to 3.5 nSec. Figure 3 shows the relationship between
the CPU and IOAPIC clocks.
Device Clock Phase Relationships
Fig.3
0nS
10nS
20nS
30nS
40nS
66MHz
100MHz
133MHz
CPU CLOCK
SDRAM CLOCK
3V66 CLOCK
PCI CLOCK
100MHz
66MHz
33MHz
CPU CLOCK
CPU CLOCK
1.5~3.5nS
Sync
7.5nS
5nS
5nS
2.5nS
IOAPIC CLOCK 33MHz


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