Part Number:BQ34Z100EVM
Hello,
I am running bqStudio (version 1.3.54) on a 64-bit Windows 7 PC. I have the PC connected to an EV2300 (version 3.1r) which is connected through I2C to a bq34z100evm (firmware 0100_0_16). I am trying to get the gauge to read an accurate voltage as I have the BAT+/BAT- pins connected to the +/- terminals of a 12 V lead acid battery.
I configured the device to read voltages above 5 V by setting the appropriate jumpers on J5 and J2; I set the VOLTSEL bit in the Pack Cfg register; I entered the Voltage Divider parameter to 13000 mV (the max expected voltage), and I changed the Number of Series Cells to 6. Everything else is at the default settings.
I have 12.4 V applied across BAT+/BAT- but the gauge is reading 8.4 V. I am trying to calibrate the device but when I enter 12440 mV into the Applied Voltage box I get the error "calibration cell voltage is out of range. This value is in millivolts. Please check value and retry." How do I fix this?
If it helps, the Control Status Register is 0x0014, and the Pack Cfg register is 0x49D9. Flags is 0x1116, and Flags B is 0x2400 (see pic below). Note that the CALEN bit in the Control Status register is cleared: am I supposed to be in some kind of calibration mode? The bq34z100g1 data sheet mentions a calibration mode but there are no clear instructions in neither this data sheet nor the EVM user manual. Can somebody help?
