W83194BR-903 Datasheet, PDF (8/26 Pages) Winbond – STEPLESS VIA PT/PM MAIN CLOCK GENERATOR

W83194BR-903
CPU, AGP, and PCI Clock Outputs, continued
PIN
PIN NAME TYPE
9
PCI_F2
OUT
PCI5
OUT
19
PCI_STOP#* IN_tp120k
PCI6
OUT
20
CPU_STOP#* IN_tp120k
13,14,15,16 PCI [1:4]
OUT
DESCRIPTION
3.3V PCI free running clock output.
3.3V PCI clock output. Select by pin 12 MODE^& power up
initial =0.
Active low, Stop all PCI clock output besides the free running
clocks. Select by pin 12 MODE^& power up initial =1.
3.3V PCI clock output. Select by pin 12 MODE^& power up
initial =0.
Active low, Stop all CPU clock outputs. Select by pin 12
MODE^& power up initial =1.
Low skew (< 250ps) PCI clock outputs.
5.3 Fixed Frequency Outputs
PIN
PIN NAME
REF0
1
FS1*
REF1
2
FS0^&
48MHz
21
FS3^&
24_48MHz
22
SEL24_48#^&
36, 35 25MHz_[0:1]
TYPE
OUT
IN_tp120k
OUT
IN_td120k
OUT
IN_td120k
OUT
IN_td120k
OUT
DESCRIPTION
14.318MHz output.
Latched input for FS1 at initial power up for H/W selecting the
output frequency. This is internal 120K pull up.
14.318MHz output.
Latched input for FS0 at initial power up for H/W selecting the
output frequency. This is internal 120K pull down.
48MHz clock output for USB.
Latched input for FS3 at initial power up for H/W selecting the
output frequency. This is internal 120K pull down.
24MHz or 48MHz(default) clock output, In power on reset
period, it is a hardware-latched pin, and it can be R/W by I2C
control after power on reset period. Select by register 5 bit 7.
Latched input for 24MHz or 48MHz select pin. This is internal
120K pull down default 48MHz. In power on reset period, it is a
hardware-latched pin, and it can be R/W by I2C control after
power on reset period. Select by register 5 bit 7.
25MHz 2.5V push pull clock output.
5.4 I2C Control Interface
PIN
PIN NAME TYPE
32
SDATA*
I/OD
31
SCLK*
IN_tp120k
DESCRIPTION
Serial data of I²C 2-wire control interface with internal 120K pull-
up resistor.
Serial clock of I²C 2-wire control interface with internal 120K
pull-up resistor.
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