hi I need to know whether a usb to db-9 converter can be connected with a serial port programmer for programming at89s52..?
can be connected with a serial port programmer yes, if it will work is another issue. there has been many posts that programmers, especially 'programmers' did not work with converters.
Erik
You mean USB to RS232?
"a serial port programmer"
You would need to ask the particular programmer's manufacturer:
* if they just use "plain" RS232 as intended, it should work;
* if they've tried to play clever tricks by bit-banging on the control lines, then it's unlikely to work.
thank you Neil for your valuable reply.. i was trying to build a rs232(db-9 version) based programmer(which could be easily connected to computers serial port) and almost got succeeded , but so as to connect the programmer to my laptop, can i use a usb->rs232 converter so that i need not buy a usb based programmer ..
Nowadays, wouldn't it make more sense to have a USB-based programmer?!
Having built the programmer you perhaps have more insight into this than most. So what exactly can you tell us about the design/construction of your device, and the software/settings you are using to drive it?
Exactly - and so you should be able to answer my earlier questions yourself:
Does it use the RS232 purely for communication, or does it rely upon some clever bit-banging on the control lines?