Tool/software:
Hi,
We have interfaced EMIF_WAIT of the Controller to the Asynchronous Memory Device, which generates WAIT signal for Read Access.
We configured Asynchronous configuration register (CE4CFG) & AWCC Register.
The observation is that, the Chip Select (CS4), is not getting extended according to EMIF_WAIT input.
How to extend the Read cycle depending on the EMIF_ WAIT input
Regards,
KPL
Hi KPL,
The EMIF_WAIT signal will only extend the strobe period in the communication:
It is an input signal, and it extends the strobe period as long as the EMIF_WAIT signal asserted.
To perform this, we have to do two configurations:
1. To enable the EMIF_WAIT functionality we should set the EW bit in the CE2CFG register.
2. We should choose the polarity of the EMIF_WAIT using the WP0 bit in the AWCC register:
For example, if your configuration is, EW=1 and WP0 = 0 then we should apply a low pulse on the EMIF_WAIT input to extend the strobe period:
I mean as long as the EMIF_WAIT input is low the strobe period keeps on get extend and once the WP0=1 then strobe period extending will get stop and the communication will get happen normally.
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Thanks & regards,
Jagadish.
