> > Mikkil,
Thanks for you detailed answer. U15.1: _1OE = 0V U15.2: 1A = 0V U15.3: 2Y = floating (flickering +-0.000,50V) U15.4: GND = 0V U15.5: 2A = UART0_RX = 3.335V U15.6: 1Y = UART0_TX = 3.195V U15.7: 2OE = 3.352V U15.8: VCC = 3.352V Based on the voltages that when U15 is removed, the UART0_RX is at its proper voltage level (3V3) that is defined in the device tree. The strange thing is that when U15 is there, the UART0_RX is not getting 3V3. _1OE is low and 2OE is high. Then the voltage on the j4.4 should be the same as UART0_RX. But J4.4 is not 3.3V (it was 1.4 on my board) even when R165 is removed, therefore, UART0_RX is not 3.3V. How did you get the 0.58V on J4.4 using 1K resistor? I do not why 0.58V works. To my understanding, the default idle state should be high on both TX and RX lines for UART0. Regards, Shu -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
