Checking the pin-out of BM20 device for audio application, I found a duplicated signal: pin 29 and pin 36 are named P2_4 both, meaning: "System Configuration,L: Boot Mode with P2_0 low combination".
I'm using now the BM62 version in wich the P2_4 is used to set the programming mode, so for me is important to know which is the right pin for.
Another question is related to BAT_IN pin: [3.0 to 4.2]V for BM20 versione and 3.3V only for BM23: is't correct ? Which are the operative and max. voltage range ?
Latest question: VCC_REF pin 17 should be left floating or it's best to bypass it with a capacitor ?