Hi Everybody,
I've a DS89C450 uC, but i'm not able to program at it. I found some circuits, but all use serial interfacing. And i don't have a serial port Smile Do you know a way around this? I know I can buy a usb to serial convertor, but since usb has 2 I/O en the uC uses only Tx/Rx i'm sure there is a way connecting it directly to my usb port.
Thanks!!
Festhead
"since usb has 2 I/O en the uC uses only Tx/Rx i'm sure there is a way connecting it directly to my usb port."
That is not only incorrect in practice, it is also an entirely flawed argument!
No, you cannot just use the USB port; you must use a USB-to-UART converter
Thank you for clearing that up! So if i want to connect this device through usb I can just use the MAX3100? Is there a better chip for this? Because this one needs lots of components :)
An airplane normally has wheels. But that doesn't mean that an airplane can be run on the railway tracks.
Don't just assume that communication using the same number of signals and the same voltage levels are compatible.
No.
If you want something that you can "just use", then you need to buy a ready-made adaptor.
For connecting direct to the micro, you can buy modules and cables that give a logic-level (3V or 5V) output - you don't have to go via RS232.
eg, see apple.clickandbuild.com/.../ftdichip
If you want to make your own, then you are going to have to spend time studying the documentation for the chip(s), understanding it, and then designing it in