We made a development board where we use a LPC935, to program the processor on location we want to use ISP.
Now we have a problem to get the processor in ISP mode. We want to use the three pulses on the reset but do not want to switch the Vdd. We tried this on a demo board but could not get it working. The scope shows three pulses on the reset but the processor does not go to ISP mode. So is it possible to enter ISP without switching the Vdd?
We want to do this because the LPC will keep running when there is power on any of the IO pins and we do not want to use a driver for the IO.
Any suggestions?
Kind regards,
Anton Beerens
Now we have a problem to get the processor in ISP mode. We want to use the three pulses on the reset but do not want to switch the Vdd. We tried this on a demo board but could not get it working. The scope shows three pulses on the reset but the processor does not go to ISP mode. So is it possible to enter ISP without switching the Vdd?
We want to do this because the LPC will keep running when there is power on any of the IO pins and we do not want to use a driver for the IO.
Any suggestions?
Kind regards,
Anton Beerens