Chapter 6 8-bit TimersVI - 2 Overview6-1 OverviewThis 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 withcascade connection.Fosc or fs can be selected as the clock source for each timer by using the prescaler. Also, remote controloutput circuit is built in.6-1-1 FunctionsTable 6-1-1 shows functions of each timer.Table 6-1-1 Timer FunctionsIn a cascade connecion, timers 0, 4 and 5 form the "timer 0", or the lower 8 bits of 16-bit counter, and timers1 form the "timer 1", or the upper 8 bits. Timers 4 and 5 cannot be cascaded.Timer 0 Timer 1 Timer 4 Timer 5(8 bit) (8 bit) (8 bit) (8 bit)Interrupt source TM0IRQ TM1IRQ TM4IRQ TM5IRQTimer operationEvent countTimer pulse outputPWM output -Synchronous output - - -Serial transfer clock output - -Pulse width measurement -Cascade connection - -Premote control carrier output - -Clock source fosc fosc fosc foscfosc/4 fosc/4 fosc/4 fosc/4fosc/16 fosc/16 fosc/16 fosc/16fosc/32 fosc/64 fosc/32 fosc/32fosc/64 fosc/128 fosc/64 fosc/64fs/2 fs/2 fs/2 fs/2fs/4 fs/8 fs/4 fs/4fx fx fx fxTM0IO input TM1IO input TM4IO input TM5IO input-When timer 4 and 5 are used as a transfer clock for serial interface 1 function, it is not usedas a general timer.fosc: Machine clock (High speed oscillation)fx: Machine clock (Low speed oscillation)fs: System clock [ Chapter 2 2.5 Clock Switching]
