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參數資料
| 型號： | W83194AR-We |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | 200MHZ Clock For Whitney Chipset(用于英特爾的WHITNEY型芯片組的頻率為200MHZ時鐘) |
| 中文描述： | 200MHz的時鐘惠特尼芯片組（用于英特爾的惠特尼型芯片組的頻率為200MHz的時鐘） |
| 文件頁數： | 1/16頁 |
| 文件大小： | 270K |
| 代理商： | W83194AR-WE |
W83194AR-W
e
200MHZ CLOCK FOR WHITNEY CHIPSET
Publication Release Date: Nov. 1999
- 1 - Revision 0.50
1.0 GENERAL DESCRIPTION
The W83194AR-We is a Clock Synthesizer for Intel Whitney chipset. W83194AR-We provides all
clocks required for high-speed RISC or CISC microprocessor and also provides 64 different
frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally
selectable with smooth transitions.
The W83194AR-We provides I
2
C serial bus interface to program the registers to enable or disable
each clock outputs and provides 0.5% and 0.75% center type spread spectrum to reduce EMI.
The W83194AR-We accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
High drive PCI and SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30
pF loads. CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads as
maintaining 50
±
5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz provide
better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
2 CPU clocks
9 SDRAM clocks for 2 DIMMs
8 PCI synchronous clocks.
Optional single or mixed supply:
(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddA=VddC=2.5V)
Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns
Smooth frequency switch with selections from 66.8 to 200MHz
I
2
C 2-Wire serial interface and I
2
C read back
0.5% and 0.75% center type spread spectrum
Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
Two 48 MHz pins for USB
24 MHz for super I/O
48-pin SSOP package
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