Przemyslaw Lopaciuk wrote:
> I'm planning to use full RS232 on my board. I connected RB4 as DTR and RA5
> as RTS.
>
> I'm using Sipex211EEA driver and PIC18F8621. Both RA5 and RB4 are
> connected to transmit pins on Sipex.
>
> The problem is that when I want to have 1s as an output on RB4 and RA5  (
> PORTBbits.RB4 = 1 and PORTCbits.RC5 = 1) the output voltage on both pins 
> is
> about 2V and the output on Sipex is about 2V also.
>
> When I'm not using handshaking ( DTR/DST and RTS/CTS) I can send and 
> receive
> data without any problems.
>
> Where could be the reason of that 2V on RA5 and RB4? PIC, Sipex?

Sam, a schematic with the relevant parts shown would be helpful.

Best regards,

Vitaliy 

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