The true transmission level RS - 232 supplies them an integrated circuit
known as maxim-232, the one which is connected to the lines TX and RX
defined in the PIC.

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



At 06:21 PM 12/03/1998 -0700, you wrote:
>True RS-232 inverts the data: a low is +10V, a high is -10V.  The start bit
>should be a low (+10V).  Usually, +5V and 0V will work, but not always
>
>----------
>> From: James & Ili <jandi@MPSI.NET>
>> To: PICLIST@MITVMA.MIT.EDU
>> Subject: Bit time for 9600 baud
>> Date: Thursday, March 12, 1998 4:36 PM
>>
>> 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
>
>
SOLON CACERES MORENO
INGENIERO DE SISTEMAS UIS
Bucaramanga, Colombia
e-mail: cdmb@multinet.com.co
        solca@usa.net