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#279324 - 10/04/2006 18:24 Unused GPIO lines from the Empeg SA1100 CPU chip
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14496
Loc: Canada
There's a rumour that is oft repeated here, that all of the pins from the Empeg CPU (SA1100) are connected to *something*.

I'm not so sure. In particular, the LCD controller module is probably unused, leaving perhaps as many as 20 signals (or more likely only 10-12 of those) available for other purposes.

This has possibilities..

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#279325 - 10/04/2006 19:21 Re: Unused GPIO lines from the Empeg SA1100 CPU chip [Re: mlord]
JBjorgen
carpal tunnel

Registered: 19/01/2002
Posts: 3584
Loc: Columbus, OH
Hugo's words on this...
and here

I'm not a hardware guy, so I'm not sure what much of that means, but it sounds like at least 8 of them are a no-go. Not sure about the others.
_________________________
~ John

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#279326 - 10/04/2006 20:53 Re: Unused GPIO lines from the Empeg SA1100 CPU chip [Re: JBjorgen]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14496
Loc: Canada
Ahh.. thanks for dredging up those threads. There's still some potential there, just not as much as I'd hoped for.

Cheers

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#279327 - 12/04/2006 07:27 Re: Unused GPIO lines from the Empeg SA1100 CPU chip [Re: mlord]
Shonky
pooh-bah

Registered: 12/01/2002
Posts: 2009
Loc: Brisbane, Australia
I'm interested to know what "possibilities" you had in mind Mark. Care to share?
_________________________
Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)

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#279328 - 12/04/2006 11:13 Re: Unused GPIO lines from the Empeg SA1100 CPU chip [Re: Shonky]
JBjorgen
carpal tunnel

Registered: 19/01/2002
Posts: 3584
Loc: Columbus, OH
Ditto. Do share..
_________________________
~ John

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#279329 - 19/05/2006 13:52 Re: Unused GPIO lines from the Empeg SA1100 CPU chip [Re: JBjorgen]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
On a 2a there's the "ring-o-lights". ISTR this is for a PIC connected to the output (only) of serial port 3, ie the serial on the back of the player.

The right code on the PIC and you've got 11 more outputs. You could put the right sort of header on any commands to prevent normal serial output getting misinterpreted too. Mainly though, you've got somewhere to solder the PIC down

Hugo

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