i.MX Processors中的主题 Does EIM support the old Intel Multiplex operation mode

Does EIM support the old Intel Multiplex operation mode

dougbailey — Tue, 24 Jul 2018 16:51:55 GMT

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

Re: Does EIM support the old Intel Multiplex operation mode

igorpadykov — Tue, 24 Jul 2018 23:36:53 GMT

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
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: Does EIM support the old Intel Multiplex operation mode

dougbailey — Wed, 25 Jul 2018 14:13:40 GMT

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