FTDI Community

General Category => Discussion - Hardware => Topic started by: timrprobocom on February 02, 2022, 05:59:30 PM

Title: FT600 SIWU_N Pullup
Post by: timrprobocom 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.

Title: Re: FT600 SIWU_N Pullup
Post by: FTDI Community on February 04, 2022, 04:39:34 PM

Hello,

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:

https://ftdichip.com/technical-support/ (https://ftdichip.com/technical-support/)

Best Regards,
FTDI Community