Panasonic MN101C77C - Manual (Page 310)

Chapter 8 Time Base Timer / 8-bit Free-running Timer
VIII - 12 Time Base Timer
8-4 Time Base Timer
8-4-1 Operation
„ Time Base Timer (Time Base Timer)
The Interrupt is constantly generated.
Table 8-4-1 shows the interrupt generation cycle in combination with the clock source ;
Table 8-4-1 Time Base Timer Interrupt Generation Cycle
Selected clock
source
Interrupt generation cycle
fosc
fosc X 1/2 7 6.4 µs
fosc X 1/2 8 12.8 µs
fosc X 1/2 9 25.6 µs
fosc X 1/2 10 51.2 µs
fosc X 1/2 13 409.6 µs
fosc X 1/2 15 1.64 ms
fx
fx X 1/2 7 3.9 ms
fx X 1/2 8 7.8 ms
fx X 1/2 9 15.6 ms
fx X 1/2 10 31.2 ms
fx X 1/2 13 250 ms
fx X 1/2 15 1 s
fosc = 20(MHz)
fx = 32.768(kHz)