The SLUSA76B BQ24210 specification has a note in Figure 13 in the Typical Application section to tie EN_N to PG_N to disable Load Mode and auto-enable Charge Mode. Can these two pins be tied together for this functionality without a pull-up resistor (if one is not using an LED indicator) or must we always include a pull-up resistor?
The specification indicates that a maximum of 2 uA source current is required for EN_N VIH. This leads one to suspect the requirement of an external pull-up. However I recently spun a board using the BQ24210 that used to include a pull-up resistor as part of a micro-controller sense of PG_N. That sense was removed as was the pull-up leaving just PG_N tied to EN_N. At least on the lab bench the signals seem to be logic high when PG_N is not asserted and logic low when PG_N is asserted and the transitions between high and low are clean leading me to wonder if an external pull-up isn't required.
I'd rather not have to spin the board again to add back in the resistor unless it's necessary.
