w83194br-39b Winbond Electronics Corp America, w83194br-39b Datasheet - Page 3

• Manufacturer Part Number: w83194br-39b
• Description: Step-less 3-dimm Clock
• Manufacturer: Winbond Electronics Corp America

& - Internal 120K
* - Internal 120k
4.1 Crystal I/O
Xin
Xout
4.2 CPU, SDRAM, PCI, IOAPIC Clock Outputs
CPUCLK_F
CPUCLK1
RESET#
IOAPIC
SDRAM [ 0:12]
PCICLK_F/
*MODE0
PCICLK0^/FS3&
PCICLK [1:3]^
PCICLK 4
BUFFER IN
SYMBOL
SYMBOL
pull-up
pull-down
17,18,20,21,28
,29,31,32,34,
35,37,38,40
10,11,12,13
PIN
PIN
44
43
41
47
15
4
5
7
8
OUT
OUT
OUT
OUT
OUT
OUT
OD
I/O
I/O
I/O
I/O
IN
IN
- 3 -
Crystal input with internal loading capacitors and
feedback resistors.
Crystal output at 14.318MHz nominally.
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)
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.
Publication Release Date: June 2000
FUNCTION
FUNCTION
W83194BR-39B
PRELIMINARY
Revision 0.46