Am Fr 2. Mai 2008 schrieb Werner Almesberger: > How do we feed the JTAG/console subsystem ? From a Vsys combined from > all three possible sources, or from the USB-debug 100mA path ?
Andy wrote: > Joerg wrote: > | Q- Talking about power to debug-USB: should we power the FTDIchip and > | his team by debugcon-Vusb only (using U3, or something less > | sophisticated), so it doesn't take any power while no connection to > | USBdbg? Are we sure FTDIchip will show the behaviour we need regarding > | GPIO-Z|gentle-pulldown etc, while powered down? Or do we need to > | maintain power to debug circuitry all the time, to have the states we > need. > > If we can power it from host USB power it will solve most of the problem > of it taking current in normal use. But then we need to take care about > not driving high levels into it from main board when it has no local power. /jOERG _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
