W83194BR-903_06 Datasheet, PDF (9/26 Pages) Winbond – STEPLESS VIA PT/PM MAIN CLOCK GENERATOR

W83194BR-903/W83194BG-903
5.5 Power Management Pins
PIN
PIN NAME
TYPE
DESCRIPTION
33
VTT_PWRGD
IN Power good input signal is power on trapping with HIGH
active. This 3.3V input is level sensitive strobe used to
determine FS [4:0]. This pin is HIGH active.
PD#*
IN_tp120k Power Down Function. This is power down pin, low active
(PD#).
Internal 120K pull up
46 IREF
OUT 　 Deciding the reference current for the CPUCLK pairs.
The pin was connected to the precision resistor tied to
ground to decide the appropriate current.
30
RESET#
OD System reset signal when the watchdog is time out. This pin
will generate 250ms low phase when the watchdog timer is
timeout.
5.6 IREF selects Function
BOARD TARGET
TRACE/TERM Z
REFERENCE R, IREF =
ADD/(3*RR)
50 Ω
50 Ω
Rr =221 1%
IREF = 5.00mA
Rr =475 1%
IREF = 2.32mA
5.7 Power Pins
PIN
3
10,17
27
40
24
34
48
6,11,18,23,28,
37,43,47
PIN NAME
VDDREF
VDDPCI
VDDAGP
VDDCPU
VDD48
VDD2.5
VDDA
GND
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
OUTPUT
CURRENT
Ioh=4*IREF
Ioh=6*IREF
VOH @ Z
1.0V @ 50
0.7V @ 50
DESCRIPTION
3.3V power supply for REF.
3.3V power supply for PCI.
3.3V power supply for AGP.
3.3V power supply for CPU.
3.3 power supply for 48MHz.
2.5V power supply for 25MHz.
3.3V power for Analog power
Ground pin
Publication Release Date: May 2006
-5-
Revision 1.0