Other Parts Discussed in Thread: BQ20Z80, EV2400, BQ40Z50, BQ20Z80-V110, BQEVSW,
Good day TI,
I'm trying to bring up a battery pack using the bq20z80, using the software linked here: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/646475/bq20z80a-v110-ev2300-windows-xp-bq20z80/2375277#2375277
I have an issue that LED1 is ALWAYS lit. Blank BQ20z80 powers up with LED1 lit. This is giving me issues calibrating current offset. If the battery is at 100% charge, and the display pin is pulled low then the leds ramp to all 5 leds on for a moment, then all the leds turn off for "LED HOLD Time"(4s) then LED1 turns back on.
Issuing a Display ON command(0x0034) turns the LED1 OFF. In other words, DisplayOn turns the leds OFF.
I'm also having issues while trying to calibrate current/current offset where the device would completely stop communicating. requiring complete power removal/restoration to reboot the chip.
During bqEASY programming, while it is uploading the setup to the chip it gets about 90% and then I get a "USB Timeout! Please check connections. For DFI read problem, verify device was never sealed". I get 4 or five of these errors at the end of upload.
Is this due to the V1.02 firmware? Old software?
If it matters, I'm using an EV2400 programmer.
Thank you,
Errol