参数资料
型号: C9815DY
英文描述: Up to 5A ULDO linear regulator
中文描述: CPU系统时钟发生器| SSOP封装| 56PIN |塑料
文件页数: 4/19页
文件大小: 328K
代理商: C9815DY
Low EMI Clock Generator for Intel
133MHz/2DIMM Chipset Systems
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07054 Rev. **
05/03/2001
Page 4 of 19
APPROVED PRODUCT
C9815
IOAPIC 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.
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
SDRAM CLOCK
133MHz
0nS
3.75nS
3.75nS
0nS
0nS
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