Does EIM support the old Intel Multiplex operation mode

[dougbailey]

I have a device that I would like to connect to my iMX6-DL via a parallel interface using the EIM module. This device is rather old and supports 10 MHz interfaces using "Motorola", "Intel", or "Intel Multiplexed" pin schema.

To reduce pin count, I would like to use the "Intel Multiplexed" mode. I see that the EIM supports multiplexed address/data but do not see anything like ALE functionality in the EIM description. (The EIM_LBA is active low and I do not see it deasserting before CS assertion.)

Does anyone know if the EIM can support this functionality? If so, is there a data sheet that describes the timing of this interface?

Regards, 

Doug Bailey 

[igorpadykov]

Hi Dough

EIM_LBA timings are configured with RADVA and RADVN fields of the EIM_CSxRCR1 register,

RCSA and RCSN configures CS timings.

Best regards
igor
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[dougbailey · Accepted solution]

So other than the polarity of the LBA signal i.e. it asserts low when address is valid while the ALE signal on an Intel Muxed interface asserts high, I should be able to configure the RADVA, RADVN, RCSA, and RCSN value to output a waveform for a read.  Similarly, the WADVA, WADVN, WCSA, and WCSN can be configured for a write. 

Thanks for the information. 

Regards, 

Doug