How to use wait signal with an Asyncronus mode of i.MX6

[yuuki]

Dear all,

We connect FPGA to EIM of i.MX6.
We want to use a Wait(Ready) signal with an Asyncronus mode, because FPGA uses the Wait signal.

However, the EIM_WAIT signal is used only by a synchronous mode.

We understood as follows.
Is this understanding right?

- To use a wait signal with an Asyncronus mode, it is necessary to use the DTACK mode.
- A Wait signal of FPGA is connected to the EIM_DTACK_B of i.MX6.
- DTACK signal is sampled at rising edge of first ACLK after DTACK assertion.

Best Regards,
Yuuki

[igorpadykov · Accepted solution]

Hi Yuuki

you are right, in asyncronus mode it is necessary to use the DTACK,

in synchronous mode EIM_WAIT signal. Timing diagrams can be found in

sect.22.8.11 DTACK Mode - AXI Single Access IMX6DQRM

Best regards

igor

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