It worked fine for me with no load. This with the tima_timer_mode_pwm_dead_band example. Default output PA8: Connected to PA0 with default 4.7K I get to 5 V OK, but I guess you need a stiffer Resistance to get it to pull to 0. (ETA: One of the reasons it does not reach ground is because of the drop across the 270 ohm series resistor. It can be removed to get you closer to 0 V.)
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