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參數資料
| 型號： | W83194BR-39B |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | XO, clock |
| 英文描述： | STEP-LESS 3-DIMM CLOCK |
| 中文描述： | 155 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數： | 3/20頁 |
| 文件大小： | 276K |
| 代理商： | W83194BR-39B |
W83194BR-39B
PRELIMINARY
Publication Release Date: June 2000
- 3 - Revision 0.46
& - Internal 120K
pull-down
* - Internal 120k
pull-up
4.1 Crystal I/O
SYMBOL
PIN
4
I/O
IN
FUNCTION
Xin
Crystal input with internal loading capacitors and
feedback resistors.
Crystal output at 14.318MHz nominally.
Xout
5
OUT
4.2 CPU, SDRAM, PCI, IOAPIC Clock Outputs
SYMBOL
PIN
44
43
I/O
OUT
OUT
FUNCTION
CPUCLK_F
CPUCLK1
Free running CPU clock. Not affected by PD#
Low skew (< 250ps) clock outputs for host
frequencies such as CPU, Chipset and Cache.
Powered by VddL2. Low if PD# is low.
RESET# (open drain, 4ms low active pulse when
Watch Dog time out)
High drive buffered output of the crystal, and is
powered by VddL1.
SDRAM clock outputs. Fanout buffer outputs from
BUFFER IN pin.(Controlled by chipset)
RESET#
41
OD
IOAPIC
47
OUT
SDRAM [ 0:12]
17,18,20,21,28
,29,31,32,34,
35,37,38,40
7
OUT
PCICLK_F/
*MODE0
I/O
Free running PCI clock during normal operation.
Latched Input. *Mode0=1, Pin 2 is REF0; *Mode0=0,
Pin2 is PD#
Low skew (< 250ps) PCI clock outputs.
Latched input for FS3 at initial power up for H/W
selecting the output frequency of CPU and PCI
clocks.
Low skew (< 250ps) PCI clock outputs.
PCICLK 0:3 are double strength pins
PCICLK 4 is not.
Inputs to fanout for SDRAM outputs.
PCICLK0^/FS3&
8
I/O
PCICLK [1:3]^
PCICLK 4
10,11,12,13
OUT
BUFFER IN
15
IN
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