Hi,

Can anyone please suggest me a low cost 8 bit microcontroller with the following features?

1. Minimum 20 General Purpose I/O lines
2. 3.3V supply.
3. One Serial Channel.

My goal is to set up a parallel interface for printer. This microcontroller is just to receive the parallel data through the centronics parallel connector and to send it serially to the main controller, which will do the further processing.

Manu

 

Couldn't you just use a parallel in/serial out shift register?

 

It can not be done that simply.
Parallel communication between printer and PC is accomplished with a number of control signals including Strobe, Busy, Ack, etc. Printer should respond to the signals from PC appropriately.

 

Almost any micro with enough IO would be up to such task. Do you have access to a programmer of some sort. Or do you plan to get one. As this will decide which brand of controller you can use

 

Why do you want to control a printer through a parallel interface? All printers today use a USB interface.

 

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en027152

This chip has plenty of I/O, 3.3v logic levels, and a parallel master port that might be able to take care of the printer connectivity.

 

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en027152

This chip has plenty of I/O, 3.3v logic levels, and a parallel master port that might be able to take care of the printer connectivity.

A better way to go.

http://www.microchip.com/maps/main.aspx

Search for the exact one to suit your needs.

 

Hi friends,

Thank you very much for helping me

Manu.