Hi, friends. I suggest to use the MAX2323 as this chip can be operated with 3.3 V available e.g. from pins at the Raspberry Pi. It operates with 100KHz, the capacitors should have a value of 100 nF. I draws approx. 6-8 mA at idle. Regards Edgar, DJ3PU, from Munich Am 28.01.2013 18:03, schrieb Johannes Poehlmann:
On Fri, Jan 25, 2013 at 05:54:38PM +0100, Guillaume Gardet wrote:
I would like to add that there is no serial available on the Pi for playing with u-boot. :( Yes, there is. I don't know if U-Boot does support it, but the RPi certainly has a serial console port.
Yeah, as you can see in the pic I posted, there is the pin configuration connected to a USB serial cable, it worked just fine. Yes there are some pins available for UART, but nothing out of the box. :( Be careful, you can brick your device if connecting the UART pins directly to a serial cable (wrong Voltage). You need a level converter (e.g. MAX 232).
I am writing this just for safety. You all know that, i assume.
Johannes
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