FTDI Community

Please login or register.

Login with username, password and session length.
Advanced Search  


Welcome to the FTDI Community!

Please read our Welcome Note

Technical Support enquires
please contact the team
@ FTDI Support

New Bridgetek Community is now open

Please note that we have created the Bridgetek Community to discuss all Bridgetek products e.g. EVE, MCU.

Please follow this link and create a new user account to get started.

Bridgetek Community

Author Topic: FT600 SIWU_N Pullup  (Read 966 times)


  • Newbie
  • *
  • Posts: 3
    • View Profile
FT600 SIWU_N Pullup
« on: February 02, 2022, 05:59:30 PM »

We're doing a design with the FT600 where we are streaming 100MB/sec.

The data sheet shows that the SIWU_N pin needs to have a pullup.  However, the schematic for your FT600 eval board leaves that pin floating.  Based on that schematic, our designer left the pin floating.  What is the effect of that?  How large of a pullup should it have?

Tim Roberts
Providenza & Boekelheide, Inc.

FTDI Community

  • Administrator
  • Hero Member
  • *****
  • Posts: 775
    • View Profile
Re: FT600 SIWU_N Pullup
« Reply #1 on: February 04, 2022, 04:39:34 PM »


There are no internal pullups or pulldowns on databus FIFO, RD,WR,OE and SIWU.

This is classed as an I/O pin as per the datasheet so should be pulled up to VCCIO.

I can see that the datasheet instructs to pull this pin up but our evaluation modules don't have such a pullup.

If you can please send an email to your local support office we will be able to contact our R&D team to find out more details about this:


Best Regards,
FTDI Community