w83193r-01 Winbond Electronics Corp America, w83193r-01 Datasheet - Page 3

• Manufacturer Part Number: w83193r-01
• Description: 83.mhz 3-dimm Clock
• Manufacturer: Winbond Electronics Corp America

5.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
# - Active Low
* - Internal 250k
5.1 Crystal I/O
Xin
Xout
5.2 CPU, SDRAM, PCI Clock Outputs
CPUCLK [ 0:3 ]
IOAPIC
SDRAM [ 0:11]
PCICLK_F/ *FS1
PCICLK 0 / *FS2
PCICLK 1/ *FTS
SYMBOL
SYMBOL
pull-up
17,18,20,21,28
,29,31,32,34,
40,41,43,44
35,37,38
PIN
PIN
47
10
4
5
7
8
OUT
OUT
OUT
I/O
I/O
I/O
I/O
I/O
IN
O
- 3 -
Crystal input with internal loading capacitors and
feedback resistors.
Crystal output at 14.318MHz nominally.
Low skew (< 250ps) clock outputs for host
frequencies such as CPU, Chipset and Cache.
Vddq2 is the supply voltage for these outputs.
High drive buffered output of the crystal, and is
powered by VDDq2.
SDRAM clock outputs which have the same
frequency as CPU clocks.
Latched input for FS1 at initial power up for H/W
selecting the output frequency of CPU, SDRAM and
PCI clocks.
Free running PCI clock during normal operation.
Latched input for FS2 at initial power up for H/W
selecting the output frequency of CPU, SDRAM and
PCI clocks.
PCI clock during normal operation.
Latched input for FTS at initial power up for H/W
selecting the output frequency of CPU, SDRAM and
PCI clocks.
PCI clock during normal operation.
Publication Release Date: May 1998
FUNCTION
FUNCTION
W83193R-01
PRELIMINARY
Revision 0.20