UPD784938 Datasheet, PDF (373/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 12 TIMER 3
12.1 Function
Timer 3 is a 16- or 8-bit timer.
In addition to its function as an interval timer, it can be used as a counter for clocked serial interface (CSI) clock generation.
The interval timer generates internal interrupts at preset intervals. The interval setting range is shown in Table 12-1.
Table 12-1. Timer 3 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
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