Skip to main content
Renesas Electronics Corporation - June is Pride Month, a month to raise awareness of the rights and the culture of the LGBTQ+ community

Features

  • 1 - Differential pair open drain CPU clocks at 2.7V
  • 1 - Differential pair push-pull CPU clocks at 2.5V
  • 11 - PCI including 1 free running and 1 early at 3.3V
  • 1 - 48MHz, at 3.3V fixed
  • 1 - 24/48MHz at 3.3V
  • 3 - REF at 3.3V, 14.318MHz
  • Programmable output frequency
  • Programmable output rise/fall time
  • Programmable slew and skew control for CPUCLK, PCICLK, AGP, REF, 48MHz, and 24_48MHz
  • Real-time system reset output
  • Spread spectrum for EMI control typically by 7dB to 8dB, with programmable spread percentage
  • Watchdog timer technology to reset the system if over-clocking causes malfunction
  • Uses an external 14.318MHz crystal

Description

The 94228 is a main clock synthesizer chip for AMD-K7 based systems with VIA style chipset. This provides all clocks required for such a system. The 94228 employs serial programming I2C interface as a vehicle for changing output functions, changing output frequency, configuring output strength, configuring output-to-output skew, changing spread spectrum amount, changing group divider ratio, and disabling/enabling individual clocks. This device also has propriety watchdog timer technology which will reset the frequency to a safe setting if the system becomes unstable from over-clocking.

Part NumberStatusSamplesStockPackageLead Count (#)Temp. GradePb (Lead) FreeCarrier Type
94228BFLFTObsoleteN/AOut of StockSSOP48#CYesReel

Support Communities

  1. TCP Client Sample (SDK 3.2.2.0)

    Hello, I'm trying to run the TCP client sample and connect my device to a TCP server but it's not working (i used this guide : DA16200 FreeRTOS Example Application Guide "UM-WI-055" ) :  I defined the TCP server IP address, and i've set the port number (10192 ...

    Apr 30, 2022
Support Communities

Support Communities

Get quick technical support online from Renesas Engineering Community technical staff.
Browse Articles

Knowledge Base

Browse our knowledge base for helpful articles, FAQs, and other useful resources.
Submit a Ticket

Submit a Ticket

Need to ask a technical question or share confidential information?