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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: 4/16頁
文件大小: 270K
代理商: W83194AR-WE
W83194AR-We
PRELIMINARY
Publication Release Date: Nov. 1999
- 4 - Revision 0.50
4.3 I
2
C Control Interface
SYMBOL
PIN
I/O
FUNCTION
*SDATA
25
I/O
Serial data of I
2
C 2-wire control interface with internal
pull-up resistor.
Serial clock of I
2
C 2-wire control interface with
internal pull-up resistor.
*SDCLK
28
IN
4.4 Fixed Frequency Outputs
SYMBOL
PIN
3
I/O
I/O
FUNCTION
REFX2 / *FS3
14.318MHz reference clock. This REF output is the
stronger buffer for ISA bus loads.
Latched input for FS3 at initial power up for H/W
selecting the output frequency of CPU, SDRAM and
PCI clocks (Default=1).
24MHz or 48MHz output clock.
Latched input for SIO_SEL at initial power up for the
output frequency of 24MHz(HIGH) and 48MHz(LOW)
clocks.
48MHz output for USB during normal operation.
48MHz / Latched input for FS4 at initial power up
for H/W selecting the output frequency of CPU,
SDRAM and PCI clocks (Default=0).
*SIO_SEL/24_48MHz
23
I/O
48MHz_0
48MHz_1/ FS4#
21
22
O
I/O
4.5 Power Pins
SYMBOL
PIN
48
24
6
16
2
42,34
27
FUNCTION
VddL
Vdd48
Vdd3
VddP
VddR
VddS
VddA
Vss
Power supply for CPU & IOAPIC, 2.5V or 3.3V.
Power supply for 48MHz output,3.3V.
Power supply for 3V_66 output, 3.3V.
Power supply for PCICLK, 3.3V.
Power supply for REFX2, 3.3V.
Power supply for SDRAM[0:8], nominal 3.3V.
Power for I2C CLK and DATA.
Circuit Ground.
5,9,13,20,26,30,38,
43
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