W83194BR-648 Просмотр технического описания (PDF) - Winbond

Номер в каталоге

Компоненты Описание

Список матч

W83194BR-648

CLOCK GENERATOR FOR SIS P4 SERIES CHIPSET

Winbond 

W83194BR-648

5.3 I2C Control Interface

PIN

PIN NAME TYPE

DESCRIPTION

34

SDATA*

I/O Serial data of I2C 2-wire control interface, Internal 120KΩ pull-up.

35

SDCLK*

IN Serial clock of I2C 2-wire control interface, Internal 120KΩ pull-up.

5.4 Fixed Frequency Outputs

PIN

PIN NAME TYPE

DESCRIPTION

Deciding the reference current for the CPUCLK pairs. The pin

was connected to the precision resistor tied to ground to decide

38

IREF

IN the appropriate current. There are two modes to select different

current via power on trapping the Pin 26 (MULTISEL0). The table

is show as follows.

REF0

OUT 3.3V, 14.318 MHz reference clock output.

2

FS0&

INtd120k

Latched input for FS0 at initial power up for H/W selecting the

output frequency. Internal 120 KΩ pull- down.

REF1

OUT 3.3V, 14.318 MHz reference clock output.

3

FS1&

INtd120k

Latched input for FS1 at initial power up for H/W selecting the

output frequency, Internal 120 KΩ pull- down.

REF2

OUT 3.3V, 14.318 MHz reference clock output.

4

FS2&

INtd120k

Latched input for FS2 at initial power up for H/W selecting the

output frequency. Internal 120 KΩ pull- down.

24_48 MHz OUT 24 MHz or 48 MHz clock output selected by Register.

26

MULTISEL0*

INtp120k

MULTISEL0* at initial power up for H/W selecting the current

multiplier for CPU outputs. Internal 120 KΩ pull-up.

27

48 MHz

OUT 48 MHz output for USB.

5.5 Power Management Pins

PIN

PIN NAME TYPE

DESCRIPTION

PD#*

IN

Power Down pin, low active all clocks are stopped, internal

120KΩ pull up.

33

Power good input signal comes from ACPI with high active. This

VTT_PWGD

IN

3.3V input is level sensitive strobe used to determine FS [4:0] and

MULTISEL0 input are valid and is ready to sample. This pin is

high active.

45

CPU_STOP#*

IN

CPU clock stop control pin, This pin is low active. Internal 120KΩ

pull-up.

12

PCI_STOP#*

IN

PCI clock stop control pin, This pin is low active. Internal 120KΩ

pull-up.

-4-

Share Link: