Panasonic MN101C77C, F77G user manual shows functions of each timer, Timer Functions

Chapter 6 8-bit Timers

6-1 Overview

This LSI contains two general purpose 8-bit timers (Timers 0 and 1) and two 8-bit timers (Timers 4 and 5) that can be also used as baud rate timer. The general purpose 8-bit timers can be used as 16-bit timers with

cascade connection.

In a cascade connecion, timers 0, 4 and 5 form the "timer 0", or the lower 8 bits of 16-bit counter, and timers 1 form the "timer 1", or the upper 8 bits. Timers 4 and 5 cannot be cascaded.

Fosc or fs can be selected as the clock source for each timer by using the prescaler. Also, remote control output circuit is built in.

6-1-1 Functions

Table 6-1-1 shows functions of each timer.

Table 6-1-1 Timer Functions

		Timer 0	Timer 1	Timer 4	Timer 5
		(8 bit)	(8 bit)	(8 bit)	(8 bit)
Interrupt source		TM0IRQ	TM1IRQ	TM4IRQ	TM5IRQ
Timer operation
Event count
Timer pulse output
PWM output			-
Synchronous output		-		-	-
Serial transfer clock output		-	-
Pulse width measurement			-
Cascade connection				-	-
Premote control carrier output			-	-
Clock source		fosc	fosc	fosc	fosc
		fosc/4	fosc/4	fosc/4	fosc/4
		fosc/16	fosc/16	fosc/16	fosc/16
		fosc/32	fosc/64	fosc/32	fosc/32
		fosc/64	fosc/128	fosc/64	fosc/64
		fs/2	fs/2	fs/2	fs/2
		fs/4	fs/8	fs/4	fs/4
		fx	fx	fx	fx
		TM0IO input	TM1IO input	TM4IO input	TM5IO input
fosc: Machine clock (High speed		oscillation)
fx: Machine clock (Low speed oscillation)
fs: System clock [	Chapter 2 2.5 Clock Switching]

-When timer 4 and 5 are used as a transfer clock for serial interface 1 function, it is not used as a general timer.

VI - 2 Overview