M16C User Manual.pdf

Timer AMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERSelecting timer mode and functionsb70 0 0b00 0Timer Ai mode register (i=0 to 4) [Address 039616 to 039A16]TAiMR (i=0 to 4)Selection of timer modePulse output function select bit0 : Pulse is not output (TAiOUT pin is a normal port pin)Gate function select bitb4 b30 0 :Gate function not available (TAiIN pin is a normal port pin)0 1 :0 (Must always be “0” in timer mode)Count source select bitb7 b60 0 : f10 1 : f81 0 : f321 1 : fC32b7 b60 00 11 01 1Countsourcef1f8f32fC32Count source periodf(XIN) : 16MHZ f(XcIN) : 32.768kHZ62.5ns500ns2µs976.56µsSetting divide ratioTimer A0 register [Address 038716, 038616] TA0(b15) (b8)b7b0 b7 b0 Timer A1 register [Address 038916, 038816] TA1Timer A2 register [Address 038B16, 038A16] TA2Timer A3 register [Address 038D16, 038C16]TA3Timer A4 register [Address 038F16, 038E16] TA4Can be set to 000016 to FFFF16Setting clock prescaler reset flag(This function is effective when fC32 is selected as the count source. Reset the prescaler for generating fC32 bydividing the XCIN by 32.)b7b0Clock prescaler reset flag [Address 038116]CPSRFClock prescaler reset flag0 : No effect1 : Prescaler is reset (When read, the value is “0”)Setting count start flagb7b0Count start flag [Address 038016]TABSRTimer A0 count start flagTimer A1 count start flagTimer A2 count start flagTimer A3 count start flagTimer A4 count start flagStart countFigure 2.2.7. Set-up procedure of timer mode287