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Issues on Clockless UART

S

Shashi

Jan 1, 1970
0
Hi,
I'm doing a project in clockless uart..as u know that the primary
function of uart is parallel to serial conversion while transmitting
and serial to paralel conversion while receiving..I was wondering if
someone could tell me as how can i do a parallel to serial conversion
and vice versa without using a clock.

Thank You
SHASHI
 
A

Al Borowski

Jan 1, 1970
0
Shashi said:
Hi,
I'm doing a project in clockless uart..as u know that the primary
function of uart is parallel to serial conversion while transmitting
and serial to paralel conversion while receiving..I was wondering if
someone could tell me as how can i do a parallel to serial conversion
and vice versa without using a clock.

I think you are talking about an asynch connection. EG there are data
lines, but no clock lines.

There's not much magic. Both devices have their own clocks. Check out
http://www.beyondlogic.org

Al
 
D

dont know

Jan 1, 1970
0
Shashi said:
Hi,
I'm doing a project in clockless uart..as u know that the primary
function of uart is parallel to serial conversion while transmitting
and serial to paralel conversion while receiving..I was wondering if
someone could tell me as how can i do a parallel to serial conversion
and vice versa without using a clock.

Thank You
SHASHI

that is called asynchronous mode, the most common one.
Is this a stand alone uart or is the uart part of a micro?
You have to set bit per word, 7 or 8bits, stop bits per char, 1 or 2
and the baudrate.
baudrate must be within +/- error allowd in uart.
This baudrate is derived from your CPU clock or onboard clock
and should be a multiple of common baudrates, i.e. 11.095MhZ for
1200, 2400, 4800, 9600, 19200 baud etc
 
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