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8.5.5 Square-wave output operation
The 16-bit timer/event counter operates as a square wave with any selected frequency which is output at intervals
of the count value preset to the 16-bit compare register (CR00).
The TO0/P30 pin output status is inverted at intervals of the count value preset to CR00 by setting bit 0 (TOE0)
and bit 1 (TOC01) of the 16-bit timer output control register to 1. This enables a square wave with any selected
frequency to be output.
TCL06
0
0
0
1
Remarks 1. f
TM0 Count Value
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Note
CHAPTER 8 16-BIT TIMER/EVENT COUNTER
Table 8-6. 16-Bit Timer/Event Counter Square-Wave Output Ranges
TCL05
TCL04
Minimum Pulse Width
2 × TI0 input cycle
0
0
× 1/f
1
0
2
2
(400 ns)
X
× 1/f
1
1
2
3
(800 ns)
X
× 1/f
(1.6 µ s)
4
0
0
2
X
: Main system clock oscillation frequency
X
2. TCL04 to TCL06: Bit 4 to bit 6 of timer clock select register 0 (TCL0)
3. Values in parentheses apply to operation with f
Figure 8-19. Square-Wave Output Operation Timings
Count Clock
0000
0001 0002
Count Start
CR00
TO0
Note
Initial value of TO0 output can be set at bits 2 and 3 (LVR0 and LVS0) of the 16-bit timer output control register
(TOC0).
Maximum Pulse Width
× TI0 input cycle
16
2
× 1/f
2
17
(13.1 ms)
X
× 1/f
2
18
(26.2 ms)
X
× 1/f
19
2
(52.4 ms)
X
= 10.0 MHz
X
N – 1
N
0000 0001 0002
N
Resolution
TI0 input edge cycle
2 × 1/f
(200 ns)
X
× 1/f
2
2
(400 ns)
X
× 1/f
3
2
(800 ns)
X
N – 1
N
0000
N
195
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