Lpc2000

Do you mean attaching this chip to UART0 for RS232 ISP and RS485 for normal operation,  leaving UART1 for full RS232 ? Here comes another diffculty - I will need optical isolation on RS485. But anyway this is a possible solution, thanks !

Still, does anybody know if UART1 modem control circuitry is in any way dependant on UART1 itself ?
It seems to be a separate hardware. 

> take a look at MAX3160E-Interface, I use it in my design with RS232 serial 
> ISP and switch to RS485 afterwards.
> 
> Thomas
>  
> > I'm about to build a system using LPC2138. It's going to be equipped
> > with RS232C and RS485 ports. As I need full RS232 implementation with
> > modem control lines, I will use UART1 for it, and UART0 for RS485 in
> > turn. 
> > 
> > Unfortunately I'd like to use serial ISP programming, which uses
> > UART0, and I don't like an idea of flashing through RS485.