W83194BR-645 Datasheet, PDF (5/24 Pages) Winbond – CLOCK GENERATOR FOR SIS 645/650 CHIPSET

W83194BR-645
5. PIN DESCRIPTION
BUFFER TYPE SYMBOL
IN
IN_tp120k
IN_td120k
OUT
OD
I/O
I/OD
#
*
&
DESCRIPTION
Input
Latched input at power up, internal 120 KΩ pull up.
Latched input at power up, internal 120 KΩ pull down.
Output
Open Drain
Bi-directional Pin
Bi-directional Pin, Open Drain.
Active Low
Internal 120 KΩ pull-up
Internal 120 KΩ pull-down
5.1 Crystal I/O
PIN
PIN NAME
6
XIN
7
XOUT
TYPE
IN
OUT
DESCRIPTION
Crystal input with internal loading capacitors (18pF) and
feedback resistors.
Crystal output at 14.318 MHz nominally with internal loading
capacitors (18pF).
5.2 CPU, ZCLK, SDRAM, PCI Clock Outputs
PIN
40, 39,
44, 43
47
14
15
16, 17, 20,
21, 22, 23
PIN NAME
CPUCLKT_0
CPUCLKC_0,
CPUCLKT_1
CPUCLKC_1,
SDRAM
PCICLK_F0
FS3&
PCICLK_F1
FS4&
PCICLK [0:5]
TYPE
OUT
OUT
OUT
IN_td120k
OUT
IN_td120k
OUT
DESCRIPTION
True CPU clock output and Complementary CPU clock output.
This pin will be stopped by CPU_STOP#
SDRAM clock output, which have syn. or asyn. Frequencies
as CPU clocks. The clock phase is the same as CPUCLKT_0
and CPUCLKT_1.
PCI free running clock during normal operation.
Latched input for FS3 at initial power up for H/W selecting the
output frequency. Internal 120KΩ pull-down
PCI free running clock during normal operation.
Latched input for FS4 at initial power up for H/W selecting the
output frequency. Internal 120KΩ pull-down
Low skew (< 500pS) PCI clock outputs.
Publication Release Date: April 13, 2005
-3-
Revision 2.1