
CHAPTER 6 16-BIT TIMER/EVENT COUNTER
99
CHAPTER 6 16-BIT TIMER/EVENT COUNTER
6.1 Outline of Internal Timer of
μ
PD78044F Subseries
This chapter explains the 16-bit timer/event counter. Before that, the timers incorporated into the
μ
PD78044F
Subseries, and the related functions are outlined below.
(1) 16-bit timer/event counter (TM0)
The TM0 can be used for an interval timer, PWM output, pulse widths 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 7 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 8 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 9 WATCHDOG TIMER
).
(5) 6-bit up/down counter (UDC)
UDC can increment or decrement counter with valid edge input.
(See
CHAPTER 10 6-BIT UP/DOWN COUNTER
.)
(6) Clock output control circuit
This circuit supplies other devices with the divided main system clock and the subsystem clock (See
CHAPTER
11 CLOCK OUTPUT CONTROL CIRCUIT
).
(7) Buzzer output control circuit
This circuit outputs the buzzer frequency obtained by dividing the main system clock (See
CHAPTER 12 BUZZER
OUTPUT CONTROL CIRCUIT
).