Flash Magic Forum

In-System Programming Support => LPC9xx/LPC9xxx => Topic started by: laps on December 07, 2011, 08:43:22 am

Title: LPC935FDH Can only program first time
Post by: laps on December 07, 2011, 08:43:22 am
 have just made a circuit base on the mcb900 and have tried programming
a LPC935FDH in this circuit. It worked the first time, however when I tried to re-program
it again it would not work and I recieved a unable to communicate message from flashmagic.
Any suggestions on what I am doing wrong
Title: Re: LPC935FDH Can only program first time
Post by: Andy Ayre on December 08, 2011, 12:44:01 am
Brand new devices reset into the bootloader. Programmed devices do not.

You are probably failing to start the bootloader. Check with a scope that three pulses are being received on the reset pin after power on.

Andy