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LPC3250 EMC interface with Spartan-6 FPGA

Question asked by Vijay N on May 26, 2019
Latest reply on May 27, 2019 by Bernhard Fink

Hi,

 

I'm using LPC3250 to communicate with my FPGA through EMC interface.

When doing a read operation my data is read as a constant value (in my case specifically 0x0008).

I brought out the EMC pins on board and used a scope to tap the signals, I see that the EMC signals (Figure (1)) are meeting the specified timing requirements as mentioned in the datasheet. But the data latched by the controller is 8 instead of 205.

                                                                                 Figure (1).

Following are the EMC configuration details for the above observation.

WAITOEN = 0x2

WAITRD = 0xA

Bus Width = 16 bits

CS Polarilty = Active low

HCLK = 104MHz

 

I have tried with increasing and decreasing the wait states but nothing seems to work.

Am I missing something here?

 

Please help.

 

Thanks,

Vijay

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