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LS1021A IFC_TA

Question asked by HENRY BAUSLEY on Feb 12, 2016
Latest reply on Feb 24, 2016 by ufedor

We now have a prototype LS1021 board running and I have one unsolved problem.

I am using IFC_CS1 to access our FPGA and everything works except the transfer acknowledge (IFC_RB1_B).

I have verified that the signal is going low for two IFC_CLK cycles but the access does not stop until it times out.

I have change the timeout time to verify that this is what is happening.

If I disable the transfer acknowledge the timing works as described in the manual.

The IFC_CS1 is in the normal GPCM operation mode.

The one thing in the manual that concerns me is that IFC_RB1_B is a dual function pin with SPI1_SIN as the other option.

There is nothing in the manual that tells what controls this pins function.

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