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7.1 Outline of Internal Timer of µ PD780973 Subseries
This chapter explains the 16-bit timer 0. Before that, the internal timers of the µ PD780973 Subseries, and the
related functions are briefly explained below.
(1) 16-bit timer 0 TM0
The TM0 can be used for pulse widths measurement, divided output of input pulse.
(2) 8-bit timer 1 TM1
The TM1 can be used for an interval timer (See CHAPTER 8 8-BIT TIMER 1 TM1).
(3) 8-bit timer/event counters 2, 3 TM2, TM3
TM2 and TM3 can be used to serve as an interval timer and an external event counter and to output square waves
with any selected frequency, PWM output (See CHAPTER 9 8-BIT TIMER/EVENT COUNTERS 2, 3 TM2, TM3).
(4) Watch timer
This timer can set a flag every 0.5 sec. and simultaneously generates interrupt request at the preset time intervals
(See CHAPTER 10 WATCH TIMER).
(5) Watchdog timer
This timer can perform the watchdog timer function or generate non-maskable interrupt request, maskable
interrupt request and RESET at the preset time intervals (See CHAPTER 11 WATCHDOG TIMER).
(6) Clock output control circuit
Clock output supplies other devices with the divided main system clock (See CHAPTER 12 CLOCK OUTPUT
CONTROL CIRCUIT).
CHAPTER 7 16-BIT TIMER 0 TM0
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