Author Topic: Help: LPC2368 can't ISP. Thank you  (Read 5739 times)

shawyoo

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Help: LPC2368 can't ISP. Thank you
« on: December 22, 2006, 01:02:51 am »
     I use the DTR and RTS control  Reset and ISP  Enable PIN (Reset PIN number 17, ISP Enable PIN number 53,(P2.10)

   I use this circuit in LPC210x and LPC213x and LPC22xx system, it can ISP the MCU.

  I had change the R15 from 1K to 10K.

  I had check the power 3.3V is right, and the circuit no problem.

  I do't know why it can't ISP.

  Thank you 

 

 

 

   
« Last Edit: December 25, 2006, 05:04:35 pm by shawyoo »

Andy Ayre

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Re: Help: LPC2368 can't ISP
« Reply #1 on: December 22, 2006, 08:15:48 am »
Are you saying your circuit works with all the LPC2xxx devices except the LPC2368?
If yes, are you simply swapping the devices in the same hardware or does each device you are testing have it's own hardware?
Which devices are using the 10K resistor? All of them or just the LPC2368?

Andy
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shawyoo

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Re: Help: LPC2368 can't ISP
« Reply #2 on: December 22, 2006, 07:13:16 pm »
   Yes, the circuit works with all the LPC2xxx devices except the LPC2368.
   I disbelieve the LPC2368 has wrong. But, 3 circuit boards,all of LPC2368 were wrong?? I only have 3 samples,can't buy it at China.
   All of devices are using the 10K resistor.the 10K resistor just only make the HC4053's channel select pin to low level easy.
   Thank you
« Last Edit: December 24, 2006, 05:12:48 pm by shawyoo »

shawyoo

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Re: Help: LPC2368 can't ISP
« Reply #3 on: December 25, 2006, 05:04:04 pm »
   I  bought 10 piece of LPC2368 lastly. Try again.