NEC 78014Y Series, User Manual

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CHAPTER 8 16-BIT TIMER/EVENT COUNTER
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(2) PWM output
TM0 can generate 14-bit resolution PWM output.
(3) Pulse width measurement
TM0 can measure the pulse width of an externally input signal.
(4) External event counter
TM0 can measure the number of pulses of an externally input signal.
(5) Square-wave output
TM0 can output a square wave with any selected frequency.
Table 8-3. 16-Bit Timer/Event Counter Square-Wave Output Ranges
Minimum Pulse Width Maximum Pulse Width Resolution
2
×
TI0 input cycle 2
16
×
TI0 input cycle TI0 input edge cycle
2
2
×
1/f
X
(400 ns) 2
17
×
1/f
X
(13.1 ms) 2
×
1/f
X
(200 ns)
2
3
×
1/f
X
(800 ns) 2
18
×
1/f
X
(26.2 ms) 2
2
×
1/f
X
(400 ns)
2
4
×
1/f
X
(1.6
µ
s) 2
19
×
1/f
X
(52.4 ms) 2
3
×
1/f
X
(800 ns)
Remarks 1. f
X
: Main system clock oscillation frequency
2. Values in parentheses apply to operation with f
X
= 10.0 MHz
8.3 16-Bit Timer/Event Counter Configuration
The 16-bit timer/event counter consists of the following hardware.
Table 8-4. 16-Bit Timer/Event Counter Configuration
Item Configuration
Timer register 16 bits
×
1 (TM0)
Register 16-bit compare register: 1 (CR00)
16-bit capture register: 1 (CR01)
Timer output 1 (TO0)
Control register Timer clock select register 0 (TCL0)
16-bit timer mode control register (TMC0)
16-bit timer output control register (TOC0)
Port mode register 3 (PM3)
External interrupt mode register (INTM0)
Sampling clock select register (SCS) Note
Note Refer to Figure 18-1 Basic Configuration of Interrupt Function.