[51] Using DS89C450 wth modern hardware

[TheSoundMan]

Recently brought some DS89C450's and i'm wondering if anyone can help me begin programming it? preferably USB-serial and in circuit if it's possible. I'm running windows on a modern computer (without parallel or serial port), although I have another linux machine with these ports I may be able to use. I know there's old threads everywhere, but nothing past 2010 and most of them apply to the 420.

Hoping someone has experience? Thanks!!!

 

[horace1]

you can add a RS232 connection to a modern laptop with a USB-RS232 cable, e.g.
https://www.ftdichip.com/Products/Cables/USBRS232.htm

 

[TheSoundMan]

And then how would I wire this into the chip? I'm totally without clue . I know micro's, just not this one and its got me stumped. I've just ordered some MAX232 from maxim which apparently I need. Do you have any idea where to buy the HC/AC 125 pictured?

Link:

www.maximintegrated.com/en/images/appnotes/3262/3262Fig01.gif

 

[TheSoundMan]

I now have a USB serial converter. As per the diagram I attached in my response, do I still require the DS232A and HA/AC125 or can they be omitted when not using traditional serial?

 

[toastedsiopao]

It depends on your usb to serial converter, if what you have is a TTL one, then you do not have to use the DS232 or other RS232 converter.

 

[toastedsiopao]

The HC125 chip is for toggling the run and program mode, you can eliminate it by just grounding/connecting to Vcc the needed pins.