Found it in the 1.6 update.

Timer
Alarm mode
A mode which sounds an alarm every minute
during the remaining time up to the timer alarm
time has been added.
1. Open the Timer screen.
2. Change the setting by pressing or button.
 : An alarm sounds every minute of the elapsed
time from timer start. (Conventional mode)
 :An alarm sounds every minute of the
remaining time up to the alarm time.