topic Re: LPCXpresso 1343 work alone in LPCXpresso IDE

LPCXpresso 1343 work alone

lpcware — Wed, 15 Jun 2016 22:29:47 GMT

Content originally posted in LPCWare by frnkyan on Wed Mar 23 12:11:07 MST 2011
I have a LPCXpresso 1343, works good with the USB cable connecting PC.
Now I need to let the "target side" work alone (without USB-link) for temperature test. ( "target side" is the right half of the board, without the LPC-link located at left half of the board , just the LPC1343 and the 12Mhz Xtal and a led)

I did cut 8 wires connecting left and right half of the board (J4) and have 3.3VDC from an external power supply connecting pin-2 and GND connecting pin-16. the progam that runs is the blinky from the examples.This code makes the LED blinking.

When I power on, 3.3VDC went to the board but I don't see the LED blinking. the current of the external power supply displays 0.1amp
After that, I re-connect these 8 wires, put the board back to the origunal connection to PC throught USB cable, LED blinks again.

Should I have a push button or something to start?
Please help

Re: LPCXpresso 1343 work alone

lpcware — Wed, 15 Jun 2016 22:29:48 GMT

Content originally posted in LPCWare by Ex-Zero on Wed Mar 23 13:50:43 MST 2011
Not sure which pins we are talking about :)

http://www.embeddedartists.com/products/lpcxpresso/LPCXpressoLPC1343revA.pdf

Sheet 5 shows correct connection:

J1-1 GND
J1-28 +3.3V

After connecting target board to VCC it should blink immediately.

Power consumption should be < 20mA.

Re: LPCXpresso 1343 work alone

lpcware — Wed, 15 Jun 2016 22:29:48 GMT

Content originally posted in LPCWare by larryvc on Wed Mar 23 14:27:06 MST 2011
Little typo.

J4-16 = J6-1 GNDX GND
J4-2 = J6-28 VIO_3V3X +3.3V

Power should be ok. I don't have this board so can't verify.

Try J6-1 and J6-28 for Gnd and 3.3V as Zero meant.