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Share UART of 8051 with different module

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This topic has 4 replies, 3 voices, and was last updated 8 years, 4 months ago by Ashutosh Bhatt.

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September 15, 2014 at 7:45 am #4895

Shailesh Kukna
Participant

Can we share UART pins (Tx & Rx) directly with different module as shown in figure?

Or we have to use a latch or other mux/demux?

Which IC is used for this purpose?

September 16, 2014 at 9:02 am #12191

AJISH ALFRED
Participant

I’ve seen this kind of task successfully done using Analog switch IC, like 74VHC4066

September 16, 2014 at 5:50 pm #12196

Ashutosh Bhatt
Participant

why you want to use 8051 only?

switch to AVR. it has 2 UARTs. for PC communication it has USB support.

September 17, 2014 at 4:15 am #12198

Shailesh Kukna
Participant

Yes I knew that AVR has 2 UART but it it is challengeable job for me & others also.

September 19, 2014 at 7:04 pm #12205

Ashutosh Bhatt
Participant

the application you are implementing will be much more easier with AVR.

8051 has limited resources as compared to AVR
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