Hi everyone, I'm trying to interface a RTC with my BBB using the I2C bus. The reference manual states that none of the pins in the expansion connectors should be driven while the system is not powered on. I have isolated other inputs using tristate buffers and the SYS_RESETn, but the I2C lines, being bidirectional is a bit trickier. Is it necessary in this case to isolate the lines during power up? I'm connecting the pull-ups to the +3v3 pin on the expansion connector.
If I should isolate the lines, what's the best method? I'm thinking of using a cmos switch to disconnect the resistors during power up, but maybe there are better ideas. Thnaks! -- 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.
