Panasonic MN103001G/F01K - Manual (Page 234)

8-bit Timers
10-14
[Note]
When setting TMnCNE to "1", do so while TMnLDE is set to "0".
When setting TMnLDE to "1", do so while TMnCNE is set to "0".
Operation is not guaranteed if TMnCNE and TMnLDE are both set to "1" at the same time.
Table 10-5-2 PWM Output Waves
TMnOM0 setting Upon initialization When TMnBC and TMnCMP settings match In event of an underflow
0 "L" level output "H" level output "L" level output
1 "H" level output "L" level output "H" level output