Programmable Devices
CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers
21600 Discussions

Help: IO Pin as clock?

Altera_Forum
Honored Contributor II
1,266 Views

Is it possible to use a ProtoIO pin as a clock driver? The reason I ask is I would like to interface a 40 pin daughter card with an HSMC port using an HSMC to 40 pin debug header but the clocks don't line up. If it is possible, how would I go about assigning this in Quartus? 

 

Thanks.
0 Kudos
2 Replies
Altera_Forum
Honored Contributor II
659 Views

 

--- Quote Start ---  

Is it possible to use a ProtoIO pin as a clock driver? The reason I ask is I would like to interface a 40 pin daughter card with an HSMC port using an HSMC to 40 pin debug header but the clocks don't line up. If it is possible, how would I go about assigning this in Quartus? 

 

Thanks. 

--- Quote End ---  

 

 

Hi, 

 

there is no basic problem to use an FPGA I/O as a ock driver. You have to assign your clock signal to an I/O, which is connected to the HSMC port. You can do that with the Assignment Editor or with the Pin Planer tool in Quartus.
0 Kudos
Altera_Forum
Honored Contributor II
659 Views

Yes, you can use the I/O pin as a clock driver. Take care about using a low output drive strength (I suggest you 4mA) in order to avoid annoying overshoots that may intefere with the adjacent data lines.

0 Kudos
Reply