If the pilot moves the trim switches on the column, that interrupts/overrides the MCAS commands and the pilots commands are followed by the trim system. MCAS resets and will fire again if more than 5 seconds have passed since the column switches were released and its triggering logic is satisfied.
When MCAS is activated, the column cutout switches are bypassed. This enables MCAS to change the trim in the direction opposite the column input from the pilot based on the presumption that the pilot is approaching a turning stalled condition.