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From: arslan on 20 Jun 2008 00:10
I am currently working on developing a 8031 based microcontroller system. I
am using 8031 x2, 28c256 and 6264. I am having some trouble making the ckt
can any body provide me with a ckt.
From: JSprocket on 20 Jun 2008 03:30
arslan wrote:
> I am currently working on developing a 8031 based microcontroller system. I
> am using 8031 x2, 28c256 and 6264. I am having some trouble making the ckt
> can any body provide me with a ckt.

Remember that the 8031 is sibling to the 805x, so anything for the 8x51
or 2 will do:
http://www.pjrc.com/tech/8051/board4/schematic.html

There's nothing to it really. Latch the lower address byte on ALE using
a 74x373, decode the addresses with a 74x138 or two, and Robert is truly
your parent's sibling.

JS
From: MK on 20 Jun 2008 03:37

"arslan" <arsl_khalid(a)yahoo.com> wrote in message
news:N8CdnT7xWMxQsMbVnZ2dnUVZ_v7inZ2d(a)giganews.com...
>I am currently working on developing a 8031 based microcontroller system. I
> am using 8031 x2, 28c256 and 6264. I am having some trouble making the ckt
> can any body provide me with a ckt.

It might help if you explained to the group what it is you are trying to
make. Looking at your recent posts you seem to have a project in mind.

The parts you are using are very old (and I think most would describe as
obsolete).

If you really want to stay with 8031 type architecture look at Silabs range
of processors (www.silabs.com). They are much faster (than straight 8031)
and come with flash and RAM on chip as well as a good coice of peripherals.
They have proper on chip debug at a low cost as well.

If you are more open on the processor choice look at STM32 range from ST
(www.st.com) where you can have a nice modern 32bit ARM based processor with
on chip RAM, FLASH, fast ADC,DMA, DACs and debug.
Cheap or free dev tools (or flashy expensive ones if you like).


Michael Kellett

www.mkesc.co.uk




From: Jim Granville on 20 Jun 2008 04:58
arslan wrote:

> I am currently working on developing a 8031 based microcontroller
> system. I am using 8031 x2, 28c256 and 6264. I am having some trouble making the
> ckt can any body provide me with a ckt.

Missing a HCT373 ?

As others have mentioned, why bother ?
What you describe above, has NO In System programming, and NO
In system Debug (but yes, it will run 80C51 code).

So, why not get a system that scores 3/3, not 1/3 ?

Go to www.silabs.com/toolstock, and for under $20, you get a
PCB with ADC/DAC, and OnChip debug, and all pre-mounted
They now have a couple of dozen variants. You can go for raw MHz,
or higher resolutions ADC/DAC, or 5V operation.
The C8051F410 series is a good mainstream, 'better ADC' type '
of device.

-jg

From: Rich Webb on 20 Jun 2008 07:56
On Thu, 19 Jun 2008 23:10:53 -0500, "arslan" <arsl_khalid(a)yahoo.com>
wrote:

>I am currently working on developing a 8031 based microcontroller system. I
>am using 8031 x2, 28c256 and 6264. I am having some trouble making the ckt
>can any body provide me with a ckt.

There are some useful tutorials and example projects that you could
adapt over at http://www.8052.com.

--
Rich Webb Norfolk, VA
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