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

W83194BR-903
5.5 Power Management Pins
PIN
PIN NAME
TYPE
DESCRIPTION
Power good input signal is power on trapping with HIGH active.
VTT_PWRGD IN This 3.3V input is level sensitive strobe used to determine FS
33
[4:0]. This pin is HIGH active.
PD#*
Power Down Function. This is power down pin, low active (PD#).
IN_{tp120k Internal 120K pull up}
Deciding the reference current for the CPUCLK pairs. The pin
46
IREF
OUT 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
50 Ω
50 Ω
REFERENCE R,
IREF = ADD/(3*RR)
Rr = 221 1%
IREF = 5.00mA
Rr = 475 1%
IREF = 2.32mA
OUTPUT
CURRENT
Ioh = 4*IREF
Ioh = 6*IREF
5.7 Power Pins
PIN
PIN NAME
3
VDDREF
10,17
VDDPCI
27
VDDAGP
40
VDDCPU
24
VDD48
34
VDD2.5
48
VDDA
6, 11, 18, 23,
28, 37, 43, 47
GND
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
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
VOH @ Z
1.0V @ 50
0.7V @ 50
Publication Release Date: April 13, 2005
-5-
Revision 1.1