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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
1s
fosc = 20(MHz)
fx = 32.768(kHz)