Re: How do I add firmware to a card?

["RedskullDC" <RDC@oz.org>]

"Tristan Mumford" <xtristan.xmumford@xgmail.xcom> wrote in message 
news:459bad73$0$38173$c30e37c6@lon-reader.news.telstra.net...

> Ah nice. I'm surprised I've never seen that project page. Thanks for that. 
> I
> like the writeup too.
>
> Is there anything you haven't interfaced a flash ROM to?

Flash roms are FUN!

> That reminds me. I got some nice ones recently with a separately protected
> bootblock. Problem is it needs a +12v rail to enable writing.

The 28F circuit in the design archive is for 12V flash chips.
Just need 2 x IN914 diodes and a switch.
5v through one diode directly to the programming pin
12v through a switch and the other diode to the programming pin.
Diodes stop the 12V feeding back to the 5V circuit.
You could put an LED (with appropriate series resistor) on the 12v side
to indicate when programming voltage is present.


Try www.futurlec.com.au for your electronic bits. They have a big range
of crystals/oscillators, as well as uController stuff fantastically cheap.
Postage is very reasonable. They are slightly cheaper for AUS purchasers
than the international www.futurlec.com site, but only have a limited range.
Purchased a number of things over the years, never had a drama.

For example, the international site has a great range of new "mini' boards:
SD Card interface $4.90
Stepper motor $8.90

Great value.

Red