Re: Serial programmers?

From: Roger Johansson (no-email_at_no.invalid)
Date: 03/27/05 

Date: 27 Mar 2005 07:24:22 +0200

"Lessie" <lessie__@hotmail.com> wrote:

> I was just wondering how serial programmers work, i.e.
> we need two lines, one for clock, and one for data.
> Which serial line is used to send the clock to the
> device? I assume the data uses RD/TD

The serial programming interfaces I have seen do not use the serial port
on the computer. They use the parallell port.

Look at this serial programming interface for atmel microprocessors;

http://www.speedy-bl.com/avr-prog-e.htm

The hardware consists of a few wires, more than 2 though, from the
parallell port to the microprocessor.

To me "a serial programmer" means that it uses serial technology into the
device, but it doesn't mean that a standard serial interface as in serial
ports are used. 

-- 
Roger J.