w83194br-pt Winbond Electronics Corp America, w83194br-pt Datasheet - Page 7

• Manufacturer Part Number: w83194br-pt
• Description: Stepless Via Pt Main Clock Generator
• Manufacturer: Winbond Electronics Corp America

5.3 I
5.4 Fixed Frequency Outputs
5.5 Power Management Pins
PIN
PIN
PIN
29
28
33
32
31
37
30
22
1
7
8
2
C Control Interface
SEL24_48
24_48MHz
VTT_PWR
PIN NAME
PIN NAME
PIN NAME
RESET#
SDATA*
Ratio_1
Ratio_0
48MHz
SCLK*
PD#*
FS3*
FS2*
IREF
GD#
REF
&
IN
IN
IN
TYPE
TYPE
TYPE
OUT
OUT
OUT
OUT
OUT
OUT
I/OD
OD
IN
td120k
tp120k
tp120k
IN
IN
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.
14.318MHz output.
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 15 bit 7.
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 up.
24 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 15 bit 7.
Latched input for FS2 at initial power up for H/W selecting the output
frequency. This is internal 120K pull up.
Power good input signal comes from ACPI with LOW active. This 3.3V
input is level sensitive strobe used to determine FS [4:0] and
MULTISEL input are valid and is ready to sample. This pin is LOW
active.
Gear ratio output to chipset. This output can replace CPU BSEL
signal.
Gear ratio output to chipset. This output can replace CPU BSEL
signal.
Deciding the reference current for the CPUCLK pairs. The pin was
connected to the precision resistor tied to ground to decide the
appropriate current. There are several modes to select different
current via power on trapping the Pin 12 (MULTISEL0). The table is
show as follows.
System reset signal when the watchdog is time out. This pin will
generate 250ms low phase when the watchdog timer is timeout.
Power Down Function. This is power down pin, low active (PD#).
Internal 120K pull up
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DESCRIPTION
DESCRIPTION
DESCRIPTION
W83194BR-PT