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Altera_Forum's avatar
Altera_Forum
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16 years ago

SRAM 160MHz, impedance matching

Hello, In my board I have one SRAM directly connected to a FPGA Cyclone 2. I am working at 160MHz. But sometimes I have an strange behavior when reading the SRAM. I am sure is something ab...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

How can you determine this without watching the waveforms?

R/

After test and simulate almost all the design, I suspected it was something with the impedances.

So, I played a little bit with the assignation of the pins, and the resultats of the output change.

For example if I change the assignation of the LSB and the MSB bit of the DATA BUS of the SRAM, in the output I can see drastical changes.

DABG