In my concept, The bit of start must be low, then come 8 bits of data.
Finally, it comes the bit of stop that it must be high.


                            High
  High
________________                                             ______
-------------------------> |                                            |
           ----------->
                                     | Start    -  -- - - - - - - - - - -
|Stop
                                     |______- - - - - - - - - - - - -|
                                        Low             Data

I wait that this information will be of your profit. Excuse my English.

Solon Caceres Moreno
Ingeniero de Sistemas UIS
Bucaramanga, Colombia
e-mail: solca@usa.net
              cdmb@multinet.com.co





At 05:36 PM 12/03/1998 -0600, you wrote:
>Hello,
>        I am a little confused about the bit time for RS232.
>My understanding is that the period is 104 microseconds and
>it looks like this:
>
>________             ________               ___________>
>              |            |             |              |
>              | 104us  |  104us   |  104us   | ......>  Repeat 10
>times ( 1 Start, 8 data, 1 stop)
>              I_______I             I________I
>           Start bit         bit1         bit 2 .........>
>
>I may have the polarity of the start bit wrong, I'm not sure if it
>goes low or high.
>
>
>James & Ili
>Irving, TX. 75038
>
>