Hi Team,
In our system, we need to monitor the charging status to indicate the receiver side has been attached. We need the following statuses from the BQ500212A
- Charging
- Not Charging
- Charge Complete
From the datasheet, we see the following ways to check the state:
1. Use pin 23, BUZ_DC pin for state output.
In page 16, it mentioned" Power Transfer Start Signal" , when power transfer begins, "Pin 23 outputs a 400-ms duration, 4-kHz square wave for driving low cost AC type ceramic buzzers. Pin 24 outputs logic high, also for 400 ms, which is suitable for DC type buzzers with built-in tone generators, or as a trigger for any type of customized indication scheme. " Using pin 23, we can only get the start of charge trigger, not the other states we need as listed above. Even testing these pins on the EVM, there was no output when RX side was attached.
2. Use LED pin for state output.
There are 3 LED pins for state output, when in different status, the LED has different behavior. So we can connect LED pins to our CPU's GPIO to check the status.
3. Use I2C for State check. (?)
Can we use this I2C for status monitor?
What would be the best way to monitor the status?
Thanks for your help,
Nabeel
