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Main-Chip Clock Generator for VIA PT800 Chipsets
General Description

The RTM360-108 is a 48-pin package, main-chip frequency generator that meets clock synthesizer/driver specifications of VIA P4X400/PT800 chipset solutions for Intel® P4. The RTM360-108 can be implemented with a Realtek DDR clock buffer, the RTM680-256 (48-pin SSOP, supporting 4 DDR) or the RTM680-229 (28-pin SSOP, supporting 2 DDR). The RTM360-108 provides a standard serial bus for programmable clock functions. Through this interface, spread spectrum technology can be enabled to reduce EMI.

  • CPU frequency ratio supports up to 300MHz (266/200/166/133/100MHz)
  • Power down feature
  • Programmable spread spectrum depth
  • Programmable spread spectrum model
  • Programmable driving strength
  • Programmable skew delay
  • Programmable PLL frequency
  • Programmable loop filter
  • Programmable smooth-divider
  • Programmable current Iref
  • Programmable current Vref
  • Programmable watchdog & smooth reset
  • DOS, Windows 9x/NT/2000/XP apps

RTM360-108 Pin Assignments



RTM360-108 Block Diagram




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