sync or async ?

Thread Starter

Anthony Quah

Joined Dec 1, 2007
80
Guys,

need some advice to confirm if below statement require to write sync or async assembly language program...For you information, i am doing a multifunction calculator...using M68HC11 microcontroller with assembly language to interface...

"This value must then be continuously transmitted serially and it should be able to be viewed on the
calculators display at the user’s discretion. The calculator’s serial communication’s will operate at
9600 BAUD with 8 data bits 1 start bit, 1 stop bit and no parity."

Thanks,
ANthony
 

Thread Starter

Anthony Quah

Joined Dec 1, 2007
80
I also suspect it was a asynchronous...i just go thru

Microcontroller Technology ( 68HC11 and 68HC12 ) by Peter Spasov Fifth Edition
Chapter 8 - did say about it..

- cause u need a low signal to send to Rx ( Receiver ) to tell it , u going to trasmit data...

Thanks guy..for the help
 

Papabravo

Joined Feb 24, 2006
21,157
I do not think that the 68HC11 is capable of syncronous serial communication in the sense of Bisync, SDLC, or HDLC. The SCI peripheral is async ONLY and the SPI peripheral is only syncronous within a character.
 
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