Tool Calibration Flow Chart

Part Number: Hi, I am going through the AFE44XX GAIN CALIBRATION ROUTINE flow chart. I have few questions as below: 1. The TARGET_THR = 33%. Is it 33% of the ADC full scale voltage(1.2 V)?

In that case it would be 0.396 V. In the data sheet, it is recommended to be around 80% of its full scale value. Which one is the correct one? Please, clarify. Also, it is suggested to have two parallel routines for LED1 and LED2.

For LED1, the concerned register(TIAGAIN, Address = 20h) and for LED2, the concerned register(TIA_AMB_GAIN, Address =21h). But for, TIAGAIN register(Address=20h) is reserved for factory use. Torrent Sean Paul Full Frequency Tracklist. In that case, how I can calibrate LED1? In that case, is register 21h is responsible for calibrating both LED1 and LED2? And how it works then?