Chapter 8 16-Bit Timer/Event Counter; Outline Of On-Chip Timer In Μ Pd78014, 78014Y Subseries - NEC 78014Y Series User Manual

8.1 Outline of On-chip Timer in µ PD78014, 78014Y Subseries
This section describes the 16-bit timer/event counter. First an outline of the built-in timer in the µ PD78014 and
78014Y Subseries and the related items are shown in the following.
(1) 16-bit timer/event counter (TM0)
The TM0 can be used for an interval timer, PWM output, pulse width measurement (infrared ray remote control
receive function), external event counter or square wave output of any frequency.
(2) 8-bit timer/event counters (TM1 and TM2)
TM1 and TM2 can be used to serve as an interval timer and an external event counter and to output square waves
with any selected frequency. Two 8-bit timer/event counters can be used as one 16-bit timer/event counter (See
CHAPTER 9 8-BIT TIMER/EVENT COUNTER).
(3) Watch timer (TM3)
This timer can set a flag every 0.5 sec. and simultaneously generates interrupt requests at the preset time intervals
(See CHAPTER 10 WATCH TIMER).
(4) Watchdog timer (WDTM)
WDTM can perform the watchdog timer function or generate non-maskable interrupt requests, maskable interrupt
requests and RESET at the preset time intervals (See CHAPTER 11 WATCHDOG TIMER).
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(5) Clock output control circuit
This circuit supplies other devices with the divided main system clock and the subsystem clock (See CHAPTER
12 CLOCK OUTPUT CONTROL CIRCUIT).
(6) Buzzer output control circuit
This circuit outputs the buzzer frequency obtained by dividing the main system clock (See CHAPTER 13 BUZZER
OUTPUT CONTROL CIRCUIT).

CHAPTER 8 16-BIT TIMER/EVENT COUNTER

CHAPTER 8 16-BIT TIMER/EVENT COUNTER
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