Content originally posted in LPCWare by Ex-Zero on Mon Oct 04 13:10:06 MST 2010
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Why PIO2.5 is connected to 3.3 volts?
Not necessary, it's a trick of my hardware engineer: he loves to place a supply voltage under the LQFP and sometimes use a pin to wire it out.
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I mixed up everything, so the micro-USB is only for the JTAG debugger !
Yes, LPC-Link is used for debugging (via SWD) and LPCXpresso1343 is the target board.
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Is it an obligation to cut the board in half ? Is it hard to do it properly ?
No, no obligation. If you cut it you need a power supply (3.3V) for your target board (or use a connector to reconnect them again). If you cut it, you can use LPC-Link to debug other boards via SWD (= 4 wires:):)).
It's not very difficult to cut it, something like a scalpel could help.
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On the photo I can see a USB connector, a led and I think a 3V3 regulator ?
You always need USB connector, resistors, LED and a transistor (I prefer a FET). If you connect a 3.3V voltage regulator via Schottky diode to your USB-Connector, it's a simple self-powered board.
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Do I need anything else than pulling low P0.1 and high P0.3 (I'll use the USB only to program the chip) ?
Should be all. I would recommend to connect UART and SWD, if you draw an own board.
Au revoir,
Zero
