UPD784938 Datasheet, PDF (271/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 10 TIMER/EVENT COUNTER 1
10.1 Functions
Timer/event counter 1 is 16-bit or 8-bit timer/event counter.
In addition to its basic functions of interval timer, pulse width measurement, and event counter, timer/event counter 1 can
be used as a real-time output port output trigger generation timer.
(1) Interval timer
Generates internal interrupts at preset intervals.
Table 10-1. Timer/Event Counter 1 Intervals
Minimum Interval
4/fXX
(0.32 µs)
8/fXX
(0.64 µs)
16/fXX
(1.27 µs)
32/fXX
(2.54 µs)
64/fXX
(5.09 µs)
128/fXX
(10.17 µs)
256/fXX
(20.35 µs)
512/fXX
(40.70 µs)
1,024/fXX
(81.40 µs)
Maximum Interval
Resolution
2¹⁶ × 4/fXX
(20.8 ms)
4/fXX
(0.32 µs)
2¹⁶ × 8/fXX
(41.7 ms)
8/fXX
(0.64 µs)
2¹⁶ × 16/fXX
(83.4 ms)
16/fXX
(1.27 µs)
2¹⁶ × 32/fXX
(167 ms)
32/fXX
(2.54 µs)
2¹⁶ × 64/fXX
(333 ms)
64/fXX
(5.09 µs)
2¹⁶ × 128/fXX
(667 ms)
128/fXX
(10.17 µs)
2¹⁶ × 256/fXX
(1.33 s)
256/fXX
(20.35 µs)
2¹⁶ × 512/fXX
(2.67 s)
512/fXX
(40.70 µs)
2¹⁶ × 1,024/fXX
(5.33 s)
1,024/fXX
(81.40 µs)
( ): When fXX = 12.58 MHz
Preliminary User’s Manual U13987EJ1V0UM00
271