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MB90420/5 (A) SERIES F
[bits 2, 1, 0] CLK2, CLK1, CLK0
These bits select the count clock of the 16-bit free-run timer. The clock is changed immediately after
writing to these bits, so a performed when the output compare and input capture are in the stop state.
CLK2
CLK1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
φ = Machine clock
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL
CLK0
Count Clock
φ
0
φ/2
1
φ/4
0
φ/8
1
φ/16
0
φ/32
1
φ/64
0
φ/128
1
φ φ = 16 MHz
φ φ = 8 MHz
62.5 ns
125 ns
0.25 µs
125 ns
0.25 µs
0.5 µs
0.5 µs
1 µs
1 µs
2 µs
2 µs
4 µs
4 µs
8 µs
8 µs
16 µs
11-12
φ φ = 4 MHz
φ φ = 1 MHz
0.25 µs
1 µs
0.5 µs
2 µs
1 µs
4 µs
2 µs
8 µs
4 µs
16 µs
8 µs
32 µs
16 µs
64 µs
32 µs
128 µs
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