w83195bg-341 Winbond Electronics Corp America, w83195bg-341 Datasheet - Page 9

• Manufacturer Part Number: w83195bg-341
• Description: Winbond Clock Generator For Via P4/kt Series Chipset
• Manufacturer: Winbond Electronics Corp America

5.4
5.5
5.6
44,42,38,36,32
43,41,37,35,31
PIN
25
26
PIN
28
27
PIN
DRAM Buffer
,30
,29
I2C Control Interface
Output Control Pins
45
46
IREF
RESET#
PD#*
PIN NAME
BUF_IN
FBOUT
DDRT[0:5]
SDRAM
[0,2,4,6,8,10]
DDRC[0:5]
SDRAM
[1,3,5,7,9,11]
PIN NAME
SDATA*
PIN NAME
SCLK*
CLOCK GEN. FOR VIA P4/KT SERIES CHIPSET
TYPE
OUT Deciding the reference current for the CPUT/C pairs. The pin was
OD
IN
connected to the precision resistor tied to ground to decide the
appropriate current. The table is show as follows. TABLE 1
Select by register 1 bit 6 L_MODE if L_MODE=1 this pin is System
reset signal when the watchdog is time out. This pin will generate
250mS when the watchdog timer is timeout
Select by register 1 bit 6 L_MODE if L_MODE=0 this pin is Power
Down Function. This is internal 120KΩ pull up.
TYPE
TYPE
OUT Clock outputs.
OUT Clock outputs.
MULTSEL
OUT Feedback clock for chipset. Output voltage depends on
I/OD Serial data of I
(PIN 11)
IN
IN
1
0
Reference input from chipset. 2.5V input for DDR only mode.
3.3V for standard SDRAM mode.
VDDD
SELSD_DD=1, these pins are copies of BUF_IN.
SELSD_DD=0, these pins are copies of BUF_IN.
Voltage depends on the VDDD.
SELSD_DD=1, these pins are complementary copies of
BUF_IN.
SELSD_DD=0, these pins are copies of BUF_IN.
Voltage depends on the VDDD.
resistor 120K.
Serial clock of I
resistor 120K.
Trace/ Term Z
Board Target
50 Ohms
50 Ohms
- 5 -
2
2
C 2-wire control interface with internal pull-up
C 2-wire control interface with internal pull-up
DESCRIPTION
Iref=VDD/(3*Rr)
Reference R,
Iref=2.32mA
R=475 1%
R=221 1%
Iref=5mA
DESCRIPTION
DESCRIPTION
Publication Release Date: March, 2006
Ioh=6*Iref 0.7V @ 50
Ioh=4*Iref 1.0V @ 50
Current
Output
Ioh @ Z
Revision 1.1