I have this issue with a QG8 (actually I tried with several). While it measures 3.287V on the chip between Vdd/Vss, reading the bandgap channel (27) with 10-bit A/D gives 200 (decimal). If I understand how the bandgap works, this indicates an operating voltage of 6.138 assuming typical 1.2V bandgap (Vdd=1023*1.2/ADBG)
Shouldn't I be getting a bandgap reading of about 375?
Message Edited by tonyp on 2007-12-13 02:54 PM