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PDF W83194BR-KX Data sheet ( Hoja de datos )
| Número de pieza | W83194BR-KX | |
| Descripción | STEP-LESS 3-DIMM K7 CLOCK | |
| Fabricantes | Winbond | |
| Logotipo |  |
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W83194BR-KX
STEP-LESS 3-DIMM K7 CLOCK
1.0 GENERAL DESCRIPTION
The W83194BR-KX is a Clock Synthesizer which provides all clocks required for AMD K7.
W83194BR-KX provides 64 CPU/PCI frequencies which are selectable with smooth transitions by
hardware or software. W83194BR-KX also provides 13 SDRAM clocks controlled by the none-delay
buffer_in pin.
The W83194BR-KX provides step-less frequency programming by controlling the VCO freq. and the
programmable PCI clock output divisor ratio. A watchdog timer is quipped and when time out, the
RESET# pin will output 4ms pulse signal.
The W83194BR-KX accepts a 14.318 MHz reference crystal as its input. Spread spectrum built in at
±0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock outputs and frequency
selection through I2C interface. The device meets the Pentium power-up stabilization, which requires
CPU and PCI clocks be stable within 2 ms after power-up. Using dual function pin for the slots (ISA,
PCI, CPU, DIMM) is not recommend.
2.0 PRODUCT FEATURES
• Supports AMD CPU with I2C.
• 3 CPU clocks (one free-running chipset clock controlled by I2C)
• 13 SDRAM clocks for 3 DIMMs
• 6 PCI synchronous clocks
• One IOAPIC clock for multiprocessor support
• Optional single or mixed supply:
(Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 =
3.3V, VddL1 = VdqL2 = 2.5V)
• < 250ps skew among CPU and SDRAM clocks
• < 250ps skew among PCI clocks
• < 5ns propagation delay SDRAM from buffer input
• Skew from CPU (earlier) to PCI clock 1 to 4ns, center 2.6ns.
• Smooth frequency switch with selections from 66 MHz to 200 MHz CPU
• Stepless frequency programming by controlling the VCO freq. and the clock output divisor ratio
• Programmable skew and driving strength for CPU and SDRAM clock outputs
• I2C 2-Wire serial interface and I2C read back
• ±0.25% or ±0.5% spread spectrum function to reduce EMI
• Programmable registers to enable/stop each output and select modes
• MODE pin for power Management and RESET# out when system hang
• One 48 MHz for USB & one 24 MHz for super I/O
• 48-pin SSOP package
Publication Release Date: May 2000
- 1 - Revision 0.42
1 page  
W83194BR-KX
5.0 FREQUENCY SELECTION
5.1 H/W Setting Frequency Table
FS4 FS3 FS2 FS1
0 00 0
0 00 0
0 00 1
0 00 1
0 01 0
0 01 0
0 01 1
0 01 1
0 10 0
0 10 0
0 10 1
0 10 1
0 11 0
0 11 0
0 11 1
0 11 1
1 00 0
1 00 0
1 00 1
1 00 1
1 01 0
1 01 0
1 01 1
1 01 1
1 10 0
1 10 0
1 10 1
1 10 1
1 11 0
1 11 0
1 11 1
1 11 1
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU (MHz)
166.00
160.00
155.00
150.00
145.00
140.00
136.00
130.00
127.00
124.00
120.00
118.00
116.00
115.00
114.00
113.00
112.00
111.00
110.00
109.00
108.00
107.00
106.00
104.00
102.00
133.60
133.90
133.30
95.00
100.30
100.90
100.60
PRELIMINARY
PCI (MHz)
41.60
40.00
38.70
37.50
36.20
35.00
34.00
32.50
31.70
31.00
40.00
39.30
38.60
38.30
38.00
37.60
37.30
37.00
36.60
36.30
36.00
35.60
35.30
34.60
34.00
33.40
33.40
33.30
31.70
33.30
33.40
33.30
Publication Release Date: May 2000
- 5 - Revision 0.42
5 Page 
8.0 ORDERING INFORMATION
Part Number
W83194BR-KX
Package Type
48 PIN SSOP
W83194BR-KX
PRELIMINARY
Production Flow
Commercial, 0°C to +70°C
9.0 HOW TO READ THE TOP MARKING
W83194BR-KX
28051234
814GAB
1st line: Winbond logo and the type number: W83194BR-KX
2nd line: Tracking code 2 8051234
2: wafers manufactured in Winbond FAB 2
8051234: wafer production series lot number
3rd line: Tracking code 814 G A B
814: packages made in '98, week 14
G: assembly house ID; A means ASE, S means SPIL, G means GR
A: Internal use ID
B: IC revision
All the trade marks of products and companies mentioned in this data sheet belong to
their respective owners.
- 11 -
Publication Release Date: May 2000
Revision 0.42
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet W83194BR-KX.PDF ] | |
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