Posted on May 17, 2011 at 11:32I have been trying to build a STR912 application based on the USB examples from the ST7/9 USB kit ''um0290''. After many hours of chasing flakey behaviour, I noted that the low level interrupt code in the file ''91x_ve...

Posted on May 17, 2011 at 11:32I have built five identical CPU boards using a STR912FAW44X6. Each has a backup battery to keep the RTC running when the main power is off. Of the five, one will not keep time when the power is off. From oscilliscope o...