Porting from MOD5272 to MOD5270

[pbreed]

My error on the 5272 you can use D0..D15 as only D16..D31 are used by the system.
You can not use the databus on a 5270...

[ephogy]

Can you give me a page number from the manual you are referring to with the port c question?

Trying to revive an older thread, I suppose, but I couldn't easily locate anything else on this;

We're currently interested in migrating from the MOD5272 to the MOD54415-100IR board, and like DBrunermer, we too are using the 16-bits of port C on the MOD5272 (pin 15, 16, 18, 23, 17, 19, 20, 24, 13, 12, 11, 9, 10, 7, 6, 8) as a WORD input. -- Page 6 of the MOD5272 datasheet
however, on the datasheet for the MOD5441X datasheet, the GPIO lines listed are spread across several ports and/or do not have GPIO lines listed (PH4, PH3, PH6, PE1, PH7, PE3, PH5, PE2, ADC7, ADC6, ADC5, ADC3, ADC4, ADC1, ADC0, ADC2) -- Page 7 of the MOD5441X datasheet

If I have to read several ports and merge the results into a 16-bit value this is probably OK as a result of the increased processor rate (but not desirable), but if the ADC channels can't be GPIO inputs, I suspect I'll have issues, as we read ~10KB/second via this port C.

All the other GPIO lines we are using look like they are available in a similar fashion

Thanks,
Keith

[DBrunermer]

Hi Keith,

Not to answer for NetBurner, but I don't think the ADC pins are duplexed with Port pins. When I look at page 2-5 in the MCF5441X Reference Manual V4, it looks like some of them are duplexed with a DAC, but none are duplexed with GPIO. I take it you can't make a hardware change, like a latching buffer?

- Dan B.

[ephogy]

Hi Keith,

Not to answer for NetBurner, but I don't think the ADC pins are duplexed with Port pins. When I look at page 2-5 in the MCF5441X Reference Manual V4, it looks like some of them are duplexed with a DAC, but none are duplexed with GPIO. I take it you can't make a hardware change, like a latching buffer?

- Dan B.

Thanks for the info. There's always the option of making a hardware change, but it's also always nice if this is not a requirement. We might be able to make a little breakout board to deal with the hardware incompatibilities.

Cheers