I looked around on here, and used google, and couldn't find a direct answer to this question. Please forgive me if I overlooked something.
I am working on a board to control a BLDC motor (BLWS231D-24V-2000) which has a set of integrated Hall effect sensors that I will be using in conjunction with an external capacitive encoder (AMT102-V). I will be powering the sensor with +5V coming from the Driver IC (TI DRV8323SR) I am using. Through conversations with an application engineer at the motor manufacturer, I learned that when the Hall effect sensors (open collector output) are floating, I "should" read about 6.3 V, if I were to hook them up to a scope. The MCU (XMEGA128A4U) I am planning to use operates on 3.3 V logic. Before learning about the approximate voltage from the Hall sensors in their floating state, I was planning on using a pull-up resistor to the 3.3 V supply line that will be coming from a separate linear regulator to drive the floating voltage to the logic voltage for my chip.
Should I set up a resistor divider circuit so that the floating voltage from my Hall sensors is forced to be at or near 3.3 V, or will using the pull-up scheme shown above work? Or should I be looking for a different solution to the voltage issue all together? Or is there an issue? I don't want to damage any pins on my MCU and have to completely re-design the board. This is my first experiment with hall sensors for motor control.