W83195BR-341-TR Nuvoton Technology Corporation of America, W83195BR-341-TR Datasheet - Page 5

• Manufacturer Part Number: W83195BR-341-TR
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83195BR-341-TR

• Lead Free Status / RoHS Status: Not Compliant

W83195BR-341/W83195BG-341
CLOCK GEN. FOR VIA P4/KT SERIES CHIPSET
1. GENERAL DESCRIPTION
The W83195BR-341 is a Clock Synthesizer for Intel P4 Springdale/Prescott series chipset and support
AMD Athlon processors. W83195BR-341 provides all clocks required for high-speed microprocessor
and provides step-less frequency programming and 32 different frequencies of CPU, AGP, and PCI
clocks setting. All clocks are externally selectable with smooth transitions.
2
The W83195BR-341 provides I
C serial bus interface to program the registers to enable or disable
each clock outputs and provides +/-0.25%, +/-0.5% center type and –0.5%, -1.0% down type spread
spectrum or programmable S.S.T. scale to reduce EMI.
The W83195BR-341 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
2. PRODUCT FEATURES
• 1 pairs differential clock for CPU (P4 or Athlon)
• 1 pairs differential clock for Chipset
• 3 AGP clock outputs
• Support two DDR DIMMS or three SDRAM DIMMS
• 7 PCI synchronous clocks, 1 free running
• 1 48MHz clock outputs for USB
• 1 24_48MHz for I/O chip, default 24MHz
• 2 REF 14.318MHz clock outputs
• AGP leads PCICLK from 1.5ns to 3.5ns
2
• I
C 2-Wire serial interface supports block and byte mode read/write
• Step-less frequency programming
• Smooth frequency switch with selections from 66 to 200MHz
• Programmable clock outputs Slew rate control and Skew control
• +/- 0.25% center type spread spectrum in table mode
• Programmable S.S.T. scale to reduce EMI
• Programmable registers to enable/stop each output and select modes
• 56-pin SSOP package
Publication Release Date: March, 2006
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Revision 1.1