w83194br-sd Winbond Electronics Corp America, w83194br-sd Datasheet - Page 7

• Manufacturer Part Number: w83194br-sd
• Description: Winbond Clock Generator For Intel P4 Springdale Series Chipset
• Manufacturer: Winbond Electronics Corp America

5. PIN DESCRIPTION
5.1
5.2
40, 43, 39,
31, 30, 27
BUFFER TYPE SYMBOL
37, 36
PIN
PIN
42
26
Crystal I/O
CPU, SRC, 3V66, PCI Clock Outputs
5
6
8
CLOCK GEN. FOR INTEL P4 SPRINGDALE/PRESCOTT SERIES CHIPSET
IN
IN
OUT
I/OD
OD
I/O
3V66_1, 3V66_2
IN
td120k
tp120k
CPUCLKC [0:1]
CPUCLKT [0:1]
#
&
*
3V66_3/VCH
PCICLK_F0
SRCCLKT,
SRCCLKC
PIN NAME
PIN NAME
VCH_EN
3V66_0,
XOUT
FS2
XIN
&
&
IN
IN
Input
Latch input pin and internal 120KΩ pull down
Latch input pin and internal 120KΩ pull up
Output
Open Drain
Bi-directional Pin
Bi-directional Pin, Open Drain
Active Low
Internal 120kΩ pull-up
Internal 120kΩ pull-down
TYPE
TYPE
OUT
OUT
OUT
OUT
OUT
OUT
IN
td120k
td120k
Crystal input with internal loading capacitors (18pF) and
feedback resistors.
Crystal output at 14.318 MHz nominally with internal
loading capacitors (18pF).
0.7V Current mode differential clock outputs for CPU and
Chipset.
0.7V Current mode differential clock outputs for Chipset,
100 MHz(default) or 200 MHz outputs selected by I2C
register.
66 MHz(default) or 48 MHz outputs selected by hardware
trapping data on 26 pin VCH_EN
3.3V output clocks for the chipset and AGP slot.
PCI clock output.
Latched input for FS2 at initial power up for H/W selecting
the output frequency clocks. This is internal 120KΩ pull
down.
W83194BR-SD/W83194BG-SD
- 3 -
DESCRIPTION
Publication Release Date: March, 22, 2006
DESCRIPTION
DESCRIPTION
&
selecting.
Revision 1.2