Print Page - P89V51RD2 and RTS/DTR

Title: P89V51RD2 and RTS/DTR
Post by: Jan Waclawek on June 05, 2006, 04:22:46 AM

Hello all,

Is the behaviour of handshake signals (RTS, DTR) defined in FlashMagic when device is set to P89V51RD2 (i.e. the Advanced options->Hardware config is blank)?
I observed that after clicking on "Start" (and the "Reset device etc." windows comes up), RTS gets asserted, but can I rely on this (e.g. for "parasitic" supply from RS232)?

Thanks,

Jan Waclawek

Title: Re: P89V51RD2 and RTS/DTR
Post by: Andy Ayre on June 05, 2006, 07:53:04 AM

Flash Magic won't do anything special with the signals, which means the default Windows behaviour applies. This means that when the COM port is opened DTR and RTS should be asserted.

Some PCs have reversed polarity for DTR and RTS for some reason, so watch out for that.

Title: Re: P89V51RD2 and RTS/DTR
Post by: Jan Waclawek on June 05, 2006, 08:02:25 AM

Thanks.

Jan Waclawek

Flash Magic Forum

In-System Programming Support => P89V51Rx2/P89LV51Rx2 => Topic started by: Jan Waclawek on June 05, 2006, 04:22:46 AM