Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What is the best way to have additional serial ports on AVR?

Status
Not open for further replies.
B

binnyr

Junior Member level 3
Joined
Apr 26, 2002
Messages
25
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
217
Hi:
I am currently designing a board around AT90S8515. This microcontroller has one serial port built-in.

I require four(4) additional serial ports on this board! What is the best way to have get this done without too much cpu usage? (software uart is ruled out).

Thanks in advance.
Regards
Binny
 

Hi

Use NS16C550 (UART) or it's derivatives for multiple NS16C550. It has 16 byte FIFO which reduces overhead on microcontroller interrupt rate. It supports upto 110kbits/sec baud rate.
 

Hello,

Maxim is manufacturing SPI/Microwire UARTs MAX3100 and MAX3110(with integrated RS-232 driver/receiver and internal capacitors).
Maybe you can try to use them. I think that Maxim can send you some samples
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top