bq20zXX dfi programming - data erase - BootROM mode

Hello, 

I noticed the following:

In the VB6 sample code TI is suggesting to erase all data rows in pairs with the 0x11 command.

I logged the actual  I2C communication and found that TI EV2300 with bq Evaluation Software is not using 0x11 command in ROM mode to delete the flash!

But I found another command sent 0x12 which is not documented and I do not know the reason of meaning.

Is this another kind of delete flash command? Can you please share the description?

This would be very helpful.

Thanks

Uwe