W83194BR-911 データシートの表示（PDF） - Winbond
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W83194BR-911 Datasheet PDF : 25 Pages
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W83194BR-911, W83194BG-911
STEPLESS CLOCK FOR VIA PT/PM CHIPSET
CPU, AGP, and PCI Clock Outputs, continued
PIN
PIN NAME
TYPE
DESCRIPTION
14,15,16,17 PCI [1:4]
OUT Low skew (< 250ps) PCI clock outputs.
PCI5
20
PCI_STOP#*
OUT 3.3V PCI clock output.
INtp120k
Active low, Stop all PCI clock output besides the free running
clocks.
PCI6
OUT 3.3V PCI clock output.
21
CPU_STOP#* INtp120k Active low, Stop all CPU clock outputs.
5.3 Fixed Frequency Outputs
PIN
PIN NAME
1
REF0
TYPE
OUT
14.318MHz output.
DESCRIPTION
FS1*
2
REF1
FS0&
3
REF2
23 48MHz
FS3&
24 24_48MHz
SEL24_48#&
37,36 25MHz_[0:1]
INtp120k
OUT
Latched input for FS1 at initial power up for H/W selecting
the output frequency. This is internal 120K pull up.
14.318MHz output.
INtd120k Latched input for FS0 at initial power up for H/W selecting
the output frequency. This is internal 120K pull down.
OUT 14.318MHz output.
OUT 48MHz clock output for USB.
INtd120k
OUT
INtd120k
OUT
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
33 SDATA*
32 SCLK*
TYPE
I/OD
IN
DESCRIPTION
Serial data of I2C 2-wire control interface with internal pull-up
resistor.
Serial clock of I2C 2-wire control interface with internal pull-
up resistor.
-4-
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