Panasonic MN101C77C - Manual (Page 309)

VIII - 11
Chapter 8 Time Base Timer / 8-bit Free-running Timer
8-bit Free-running Timer
If the TM6CLRS flag of the TM6MD register is set to "0", TM6BC can be initialized in every
rewriting of TM6OC register, but in that state the timer 6 interrupt is disabled. If the timer 6
interrupt should be enabled, set the TM6CLRS flag to "1" after rewriting the TM6OC register.
On the timer 6 clock source selection, either the time base timer output or the time base
timer synchronous output is selected, the clock setup of time base timer is needed.