w83195bg-912 Winbond Electronics Corp America, w83195bg-912 Datasheet - Page 5

• Manufacturer Part Number: w83195bg-912
• Description: Clock For Via Chipsets
• Manufacturer: Winbond Electronics Corp America

W83195BG-912
CLOCK GEN. FOR VIA P4/KT SERIES CHIPSET
1. GENERAL DESCRIPTION
The W83195BG-912 is a Clock Synthesizer for Intel P4 Springdale/Prescott series chipset and
supports AMD Athlon processors.
W83195BG-912 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 W83195BG-912 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 W83195BG-912 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
• 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: Mar. 2006
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Revision 0.6