lpcware

LPC1112 programming problem

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Sebastien Jacquemard on Thu Apr 25 23:34:04 MST 2013

Hello,


I've got problems to program LPC1112F/101 (HVQFN33 case) :


I made 2 verisons of PCB, first in January and second one in April.


I test the first one with success few month ago with LPC1112 revision "A" : (LPC1112F/101 - 918.105 - ZSD10300A)


The new board is also working with the same revision of the LPC1112.


Now old PCB and new PCB can't be prgorammed with new LPC1112 revision "B" (LPC1112F/101 - 536.118 - ZSD12211B).


I also try to connect a RS232 driver to drive RXD, TXD IAP and reset without success on the new board.


I use the last version of Keil (v4.70a), a J-Link Ultra from Segger with the last update. I've got message "Erase done" then "Flash timout".


I connect just the minimum PINS :


- Xtal (with a 12.0Mhz cristal)


- Vdd (pin6 and 9)


- Vss (with 100nF capacitors)


- IAP with 47K pullup to 3.3v


- Reset with 10K pullup and 100nF capacitor from ground


- To J-Link  : SWCLK, SWDIO, Ground, 3.3V and Reset


 


Any idea ?


 


Sebastien

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