AVR Microcontroller

Finally I got the problem with the limited resource of 8-bit microprocessor. One of my experiment needs the computing power between 8-bit and 32-bit cpu. For 8-bit applications I used MCS51 and AVR. Whereas the 32-bit applications, I used embbeded PC running linux. So I chose the cheap 32-bit cpu from Motorola, the 68HC000. The chip is quite old but there are many chip makers still produce it...

The circuit based on AT90S2313 AVR microcontroller from atmel, programmed with telecard.hex and telecard.eep . The converter from + - 12V of RS232 to TTL and from TTL to + - 12V is MAX232. When you build the circuit ( i think its very simple ), connect the reader with RS232 port of the PC, run the Hyper terminal software ( start programs - accessories communications Hyper terminal ) and set the baud rate to 19200 bps 8 none 1. Power on the reader, insert the telecard and press the switch to read the contain of the card. If you use a telecard base, usually this base its include a switch that is pressed when you insert the card. You can use this switch, to make the reading of the card, automatic...