Messages

Hi,

It seems from the manual that the RTS signal comming from the COM port is not used when programming P89V51.
Am I correct?

Thank you

Hi all,

I guess this topic will pop all the time until Philips release some appnote about it.
From what I understand, to enter ISP mode, the CPU must receive "U" symbol during the first 400ms after reset. I guess that means that the reset will be initiated somehow by the FlashMagic tool. In that case what circuitry do I have to add?
Is there any other way of forcing P89V51 into ISP mode (like we do with P89C51 - holidng pins down etc.)?

Thank you

Hi,

I am trying to ISP program a P89V51FBC chip. I somehow made it communicating  with FlashMagic (I could verify the chip etc). Then I erased all blocks. Then I tried to program the chip. While programming it, something happened and the process did not finish. And after that I could not connect to the chip again. It said "Reset chip in ISP" and "Decrease baud rate". The FlashMagic manual states that when erasing blocks, boot vector is erased as well and when programming is over the boot vector is set again. But what happens if the programming is not over, ie comms fails (as in my case)? The boot vector is lost and so is the chip (soldered on board and SMD at that)! How can I deal with this situation? Is not it better to set the boot vector first so even if programming fails the chip is not lost? Or to erase the boot vector selectively?
 
Thank you
zsavov