The 89EBPES4T4 Evaluation Board (also referred to as EB4T4) provides an evaluation platform for the PES4T4 switch and the PES3T3 switch. It is also a cost effective way to add a PCIe downstream port (x1) to an existing system with a limited number of PCIe downstream ports. The EB4T4 evaluation board is designed to function as an add-on card to be plugged into a x1 PCIe slot available on a motherboard hosting an appropriate root complex, microprocessor(s), and three downstream ports. The EB4T4 is a vehicle to test and evaluate the functionality of the PES4T4 chip. Customers can use this board to get a head start on software development prior to the arrival of their own hardware. The EB4T4 is also used by Renesas to reproduce system-level hardware or software issues reported by customers.



  • PES4T4 PCIe 4 port switch
  • Upstream, Downstream Port
  • Numerous user selectable configurations set using onboard jumpers and DIP-switches
  • Vaux Support
  • SMBUS Master Interface connected to the Serial EEPROMs through I/O expander
  • “Attention” button for each downstream port to initiate a hot swap event on each port
  • Four pin connector for optional external power supply
  • Push button for Warm Reset
  • Several LEDs to display status, reset, power, “Attention”, etc.
  • One 10-pin JTAG connector (pitch 2.54 mm x 2.54 mm)


  • Installation programs
  • GUI based application for Windows and Linux



Type Title Date
Manual - Hardware PDF 2.11 MB
Manual - Development Tools PDF 2.56 MB
2 items

Design & Development

Software & Tools

Software Downloads

Type Title Date
Software & Tools - Software Log in to Download ZIP 104.57 MB
Software & Tools - Software Log in to Download ZIP 54.45 MB
Software & Tools - Software Log in to Download ZIP 48.85 MB
3 items