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[bit12] TIE (timer interrupt enable flag)
This bit enables timer interrupts.
0
Timer interrupts are disabled [initial value].
1
Timer interrupts are enabled.
When this bit and TCF are both set to 1, an interrupt is sent to the CPU.
[bit11] CINV (timer clock invert flag)
This bit inverts the timer input clock signal from the external pin.
The count increments at the rising edge of the clock [initial
0
value].
1
The count increments at the falling edge of the clock.
[bit10 to bit8] TCS2 to TCS0 (timer clock select flag)
These bits are used to select the timer clock.
To use the event count mode, set these bits to 111.
Table 7.2-2 shows the clocks to be selected.
Table 7.2-2 Clocks to be Selected
TCS bit
TCS2
TCS1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
Clock and source to be selected
TCS0
Division ratio
3
φ × 2
0
φ × 2
5
1
7
φ × 2
0
φ × 2
9
1
10
φ × 2
0
φ × 2
12
1
14
φ × 2
0
1
CHAPTER 7 MULTIFUNCTION TIMER
Cycle (@20 MHz)
0.4 µs
1.6 µs
6.4 µs
25.6 µs
51.2 µs
204.8 µs
819.2 µs
External clock
177
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