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WhiteWizzard
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Posted: 20 January 2017 at 11:21am | IP Logged Quote WhiteWizzard

Hi Zonker;

A word of warning regarding the use of E100 'configured' RTCs on the MMX.

On an E100, the RTC 'pins' are effectively facing downwards so that the RTC battery ends up 'sandwiched' between the E100 PCB and the RTC PCB.

On the MMX, the RTC pins are reversed meaning the battery needs to be facing 'upwards' (i.e. not sandwiched between the PCBs).

So both the E100 and MMX 144 can use the same RTC module - but the pins need to be installed either upwards, or downwards, to match the MM PCB accordingly. If not, the RTC memory gets very hot, very quickly!!

Alternatively, leave the pins at right angles (as normally supplied from the Chinese suppliers), then you can plug the RTC into either PCB, however, the RTC will be at right-angles to the MM PCB and hence not very 'low profile'

Hope this all made sense . . . .

WW





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Zonker
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Posted: 20 January 2017 at 11:05pm | IP Logged Quote Zonker

Thank you fine Sir..!

I would have not noticed it, and cooked it..

I took the RA pins out of the E-100 RTD module and fitted up the straight ones...

I will be doing the same for the new MMX PCBA... (did we name this one?)

Is the I2C memory IC wired in..? Code to use it..?

Thanks again WW for your feedback on this..!

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WhiteWizzard
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Posted: 21 January 2017 at 11:49am | IP Logged Quote WhiteWizzard

UPDATE regarding MicroMite eXtreme 144 Modules:

- The PCB factory has finished the fabrication of the MMX144 PCBs

- DHL have picked up the consignment from the factory (1hour before factory shut down for New Year!)

- Estimated delivery date to me in UK is Thursday 26th Jan

I will let you know the minute they arrive . . . .


Zonker: The memory chip on the RTC is addressed/accessed via the same pins as the RTC. I remember there being some code somewhere on TBS to access this memory - but it is something I have not 'played' with personally.

There is an OPTION RTC 15,16 setup command to automatically let MMBASIC talk to the RTC. With this set, I do not know if the memory can then be accessed.

I will communicate with Peter Mather regarding this to clarify . . . . .

WW


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WhiteWizzard
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Posted: 21 January 2017 at 1:35pm | IP Logged Quote WhiteWizzard

@Zonker

Good news about accessing the Memory chip. Here is Peter's response:

Quote:
Option RTC doesn’t affect ordinary use of I2C so Zonker just needs to write some appropriate code to access the memory



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Posted: 22 January 2017 at 6:51am | IP Logged Quote Zonker

Ok.. Thanks Gent's.. Will look into in...

On the E-100 I dint think it was wired in...
I didn't see any tracks going to the smaller connector..
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Posted: 22 January 2017 at 7:01am | IP Logged Quote Grogster

The smaller connector on the RTC module, is just a repeat of some of the connections on the other side of the module, so they are only there for mechanical support of the module, and nothing else. You can use either side, in other words.

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WhiteWizzard
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Posted: 22 January 2017 at 1:14pm | IP Logged Quote WhiteWizzard

MMX144 PCBs have cleared Customs in Hong Kong

ETA is still quoted as 'By End of Day, Thursday 26th January'

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mallorn
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Posted: 14 January 2018 at 6:11pm | IP Logged Quote mallorn

I know it is 1 year after... but ... Is there still a chance for getting 1 or 2 MMX144 PCBs?
I guess there is always a person like me on every forum... ;/

edit: Now I'm in contact with WhiteWizzard and it looks I'm on the way to get my own MMX...

Edited by mallorn on 14 January 2018 at 7:53pm
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