Panasonic MN101C77C - Manual (Page 197)

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Chapter 4 I/O Ports
Real Time Output Control (Port 1)
External interrupt 0
(IRQ0)
P1n output
(n=0,2,4)
PITCNT set value="0"
Timer output
Writing to P1OUT register
Figure 4-10-1 Real Time Output Control Timing
P1n output (n=0, 2, 4) : Timer output
P1TCNT set level : "0" (Low) output
„ Timing