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W83194BR-323 데이터시트 PDF




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W83194BR-323 데이터시트, 핀배열, 회로
W83194BR-323/W83194BG-323
STEPLESS CLOCK FOR INTEL
BROOKDALE CHIPSET
www.DataSheet4U.com
Date: 03/22/2006
Revision: 2.1




W83194BR-323 pdf, 반도체, 판매, 대치품
W83194BR-323W83194BG-323
STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET
1. GENERAL DESCRIPTION
The W83194BR-323 is a Clock Synthesizer for Intel Brook dale 845 chipset. W83194BR-323
provides all clocks required for high-speed microprocessor and provides step-less frequency
programming and 32 different frequencies of CPU, PCI, and 3V66 clocks setting. All clocks are
externally selectable with smooth transitions.
The W83194BR-323 provides I2C serial bus interface to program the registers to enable or disable
each clock outputs and provides -0.5% and +/-0.25% center type spread spectrum or programmable
S.S.T. scale to reduce EMI.
The W83194BR-323 also has watchdog timer and reset output pin to support auto-reset when
systems hanging caused by improper frequency setting.
The W83194BR-323 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
High drive PCI CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. The
fixed frequency outputs as REF and 48 MHz provide better than 0.5V /ns slew rate.
2. PRODUCT FEATURES
3 Differential pairs of CPU clock outputs
4 3V66 clock outputs
10 PCI synchronous clocks
24_48Mhz clock output for super I/O.
48 MHz clock output for USB.
Skew form CPU to PCI clock 1 to 4 ns, center 2.6 ns
Smooth frequency switch with selections from 66.8 to 200MHz
Step-less frequency programming
I2C 2-Wire serial interface and support byte read/write and block read/write.
-0.5% and +/- 0.25% center type spread spectrum
Programmable S.S.T. scale to reduce EMI
Programmable registers to enable/stop each output and select modes
Watch Dog Timer and RESET# output pins
48-pin SSOP package
Publication Release Date: March 2006
- 1 - Revision 2.1

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W83194BR-323 전자부품, 판매, 대치품
W83194BR-323W83194BG-323
STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET
CPU, 3V66, and PCI Clock Outputs, continued
PIN
PIN NAME
TYPE
DESCRIPTION
42 PD#
6 PCICLK_F0
*FS2
7 PCICLK_F1
*FS3
IN Power Down Function. This is power down pin, low active
(PD#).
Internal 120K pull up
OUT 3.3V free running PCI clock output.
INtp120k Latched input for FS2 at initial power up for H/W selecting
the output frequency, This is internal 120K pull up.
OUT 3.3V free running PCI clock output.
INtp120k Latched input for FS3 at initial power up for H/W selecting
the output frequency, This is internal 120K pull up.
8 PCICLK_F2
&SEL24_48
10 PCICLK0
OUT 3.3V free running PCI clock outputs.
INtd120k Latched input for 24MHz or 48MHz select pin. This is internal
120K pull down default 24MHz.
OUT Low skew (< 250ps) PCI clock outputs.
*FS4
11, 12, 14, PCICLK [1:6]
15, 16, 17
INtP120k Latched input for FS4 at initial power up for H/W selecting
the output frequency, This is internal 120K pull up.
OUT Low skew (< 250ps) PCI clock outputs.
5.3 I2C Control Interface
PIN Pin Name
25 SDATA*
26 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.
5.4 Fixed Frequency Outputs
PIN
PIN NAME
TYPE
DESCRIPTION
48 REF0
OUT 14.318NHz output.
MULTSEL0*
INtp120k Latched input for MULTSEL0 at initial power up, internal
120K pull up
1 REF1
OUT 14.318NHz output.
MULTSEL1*
22 48MHz
*FS0
23 24_48MHz
*FS1
INtp120k Latched input for MULTSEL1 at initial power up, internal
120K pull up
OUT 48MHz clock output for USB.
INtp120k Latched input for FS0 at initial power up for H/W selecting
the output frequency. This is internal 120K pull up.
OUT 24(default) or 48MHz 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 16 bit 7.
INtp120k Latched input for FS1 at initial power up for H/W selecting
the output frequency. This is internal 120K pull up.
-4-

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