To Buffer or Not to Buffer (TF536)... That is the question.

[terriblefire]

Would rather solder 2 ics and 2 caps instread of ordering a separate pcb and populate it, however will be happy to any decision.
Best regards,

-8 Bit Dreams

Its 4 extra ICs, 4 caps, a transistor and 5 resistors to do it properly.

You need to buffer A2-A4, IOR, IOW, IDECS1, IDECS0 as outputs and IDEWAIT and IDEINT as inputs.

Have a look at the A4000 sheets. plus keep in mind that the CPLDs are 3.3v and the signals needed to be put up to 5V.

Its probably worth ensuring that all these are buffered on your board too.

[arkadiusz.makarenko]

Personally I can't see reason for it.

[terriblefire]

Ok i may have a compromise...

compromise.JPG

Based on a look at what @8 Bit Dreams had posted i was inspired to try this on for size.. its possible.

Basically the board comes with 3 missing IC's by default and 6 0 0hm resistor networks. If you want the buffer remove the networks and add the IC's... otherwise you can do nothing and have everything as it is now.

This seems to me to be the best compromise?

[8 Bit Dreams]

Mr. Leary, You are pcb's Banksy, because this is an artwork :idea: :idea: :idea: :arrow:

[Danoo]

Built in options, engineering ethos raise your hand :thumbup:

Just out of curiosity TF, roughly how many hours does it take to route one of these boards in Eagle (eg. from idea to first revision).

Considering a PCB production unit as an elective next semester. Altium is the design application, I have found that this app has one hell of a learning curve.

Was just wondering what sort of man hours are involved once you have some experience under the belt :?:

[8 Bit Dreams]

From sketch to working board :?:
Steve done TF328 in a weekend :!:
Those was the day's... :P

[terriblefire]

Ok..

Ten ordered with the dual buffered/unbuffered option and partial assembly.

[PaulJ_2.0]

Nice one, that's a very elegant solution.

Would it be forward of me to reserve one for testing?

[terriblefire]

I'll start a new thread. I'm going to build one myself first this time.

[Danoo]

From sketch to working board :?:
Steve done TF328 in a weekend :!:
Those was the day's... :P

Thanks for the info,
Wow :shock: that is a short amount of hours to accomplish a working prototype , How much sleep was traded to achieve that outcome?