W83193R-02 Datasheet, PDF (3/18 Pages) Winbond – 83.3 MHZ 3-DIMM CLOCK

Preliminary W83193R-02/-04/-04A
5.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
# - Active Low
* - Internal 250kΩ pull-up
5.1 Crystal I/O
SYMBOL
PIN
Xin
4
Xout
5
I/O
FUNCTION
IN Crystal input with internal loading capacitors and
feedback resistors.
OUT Crystal output at 14.318 MHz nominally.
5.2 CPU, SDRAM, PCI Clock Outputs
SYMBOL
CPUCLK [ 0:3 ]
IOAPIC
SDRAM [ 0:11]
PCICLK_F/ *FS1
PIN
40, 41, 43, 44
47
17, 18, 20, 21,
28, 29, 31, 32,
34, 35, 37, 38
7
PCICLK 0 / *FS2
8
PCICLK [ 1:4 ]
10, 11, 12, 13
PCICLK5/ PCI_STOP#
15
I/O
FUNCTION
OUT Low skew (< 250 pS) clock outputs for host
frequencies such as CPU, Chipset and Cache.
VDDq2 is the supply voltage for these outputs.
OUT High drive buffered output of the crystal, and is
powered by VDDq2.
O SDRAM clock outputs which have the same
frequency as CPU clocks.
I/O 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.
I/O 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.
OUT Low skew (< 250 pS) PCI clock outputs.
I/O Internal 250 KΩ pull-up.
If MODE = 1 (default), then this pin is a PCI5 clock
output. If MODE = 0 , then this pin is PCI_STOP #
and used in power management mode for
synchronously stopping the all PCI clocks.
Publication Release Date: April 1999
-3-
Revision A1