Panasonic MN101C77C, F77G user manual Clock Source and Generation Cycle, Tbirq TM6IRQ

Chapter 8 Time Base Timer / 8-bit Free-running Timer

8-1 Overview

This LSI has a time base timer and a 8-bit free-running timer (timer 6).

Time base timer is a 15-bit timer counter. These timers can stop the timer counting only at stand-by mode (STOP mode).

8-1-1 Functions

Table 8-1-1 shows the clock sources and the interrupt generation cycles that timer 6 and time base timer can select.

Table 8-1-1 Clock Source and Generation Cycle

	Time base timer			Timer 6
				(8-Bit free-running timer)
8-Bit timer operation	-			√
Interrupts / source	TBIRQ			TM6IRQ
				fosc
				fx
	fosc			fs
Clock source				fosc X 1/212	(*1)
	fx			fosc X 1/213	(*1)
				fx X 1/212	(*2)
				fx X 1/213	(*2)
	fosc X 1/27	(*1)
	fosc X 1/28	(*1)
	fosc X 1/29	(*1)
	fosc X 1/210	(*1)
	fosc X 1/213	(*1)		The interrupt generation
Interrupt generation	fosc X 1/215	(*1)		cycle is decided by the
cycle	fx X 1/27	(*2)		arbitrary value written to
	fx X 1/28	(*2)		TM6OC.
	fx X 1/29	(*2)
	fx X 1/210	(*2)
	fx X 1/213	(*2)
	fx X 1/215	(*2)
fosc : Machine clock (High speed oscillation)
fx : Machine clock (Low speed oscillation)
fs : System clock [	Chapter 2	2-5.	Clock Switching ]

-*1 can be used as a clock source of time base timer is selected to 'fosc'.

-*2 can be used as a clock source of time base timer is selected to 'fx'.

-Time base timer and timer 6 cannot stop timer 6 counting.

VIII - 2 Overview