On Mon, Jan 11, 2010 at 10:51:09AM -0600, John Orlando wrote: > Hi Matt, > In reviewing the schematic of the dbsrx daughtercard, I noticed that there > are two i2c devices (the EEPROM and the MAX211x receiver chip). In general > for the daughtercards, address bit A1 determines side A or side B, and A0 > determines if the card is an rx or tx card, and this is hard-coded by the > USRP itself. So...if a user has two dbsrx cards in their USRP, I think the > EEPROM of the dbsrx on side A would have the same address as the MAX211x on > side B, and vice versa. Wouldn't this be an issue?
> Also, is there a reason that address bit A2 isn't used to select different > i2c devices on the same card? I2C devices have a 7-bit address. Some of them are fixed depending on the device. E.g., on the 24LC024, the top 4-bits are 1010, which is different from the bits hardwired into a low speed A/D, D/A, etc. Take a look at the datasheets. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
