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Differences between i.MX251 and i.MX257

Question asked by Shigehisa Yamamoto on Oct 10, 2017
Latest reply on Oct 16, 2017 by Shigehisa Yamamoto

Hi all,

 

I am attempting to develop device drivers and middleware using i.MX251.

I have developed software (device drivers, middleware and application) with i.MX257.

I would like to port the existing software (using i.MX257) into i.MX251.

I have read the below MX25 datasheet and reference manual to find the differences between i.MX251 and i.MX257 as shown below.

 

- IMX25AEC Rev. 10, 06/2013

- IMX25CEC Rev. 10, 07/2013

- IMX25RM Rev. 2 01/2011

 

I got the following diff with the datasheet.

 

----------------------+------------+-------------

                            i.MX251  |  i.MX257

----------------------+------------+-------------

PATA/CE-ATA   |    -          |     yes

----------------------+------------+-------------

LCD Controller   |    -          |     yes

----------------------+------------+-------------

Touchscreen      |    -          |     yes

----------------------+------------+-------------

CSI                     |    -          |     yes

----------------------+------------+-------------

Security              |     yes     |    -

----------------------+------------+-------------

 

It seems that no functional difference between i.MX251 and i.MX257 except above.  And memory map, boot sequence and internal registers configurations of i.MX251 seems to be same as i.MX257.

 

So I think I can re-use the existing software (device drivers and middleware) which were developed for i.MX257 into i.MX251.  But not sure!

 

Then could you please advise to my questions below?

 

  1. Is my understanding correct on the difference between i.MX251 and i.MX257? i.e. the only difference between i.MX251 and i.MX257 are the table I wrote above?
  2. Excepting hardware functional difference, can I use the existing software (device drivers and middleware) which were developed for i.MX257 into i.MX251 without changing?
  3. How and where can I get the comparison table between i.MX251 and i.MX257?

 

I would appreciate it if you could answer to my questions.

 

Thank you,

 

Shigehisa Yamamoto

FAE

eSOL Co., Ltd.

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