TPS546D24A: set ADRSEL resistor

Hi Comi,

The pin-strap programming of ADRSEL pin is described in Section 7.5.2.4 on page 42 of the datasheet: https://www.ti.com/lit/ds/symlink/tps546d24a.pdf#page=42

ADRSEL pin sets the PMBus Address as well as SYNC direction, so you will need both information. If you are not using SYNC, I recommend the "Auto Detect" setting, which allows you to not use a top resistor of a resistor divider, and just use a resistor to AGND:

Then, based on Table 7-15, you get a Resistor to AGND Code of 1 for the Address of 0x21h (33d):

If you look at the Table 7-17 for Code 1, you get a resistor value of 5620 Ω (or 5.62 kΩ). So, in order to get Address 0x21, you will need a 5.62 kΩ from ADRSEL pin to AGND.

Thank you,
Tomoya