Datasheet

Timer Module

14-8 MCF5206e USER’S MANUAL MOTOROLA

Timer 1

TMR register

Bits 15:8 sets the prescale to 256 ($FF)

Bits 7:6 set for no interrupt ("00")

Bits 5:4 sets output mode for "toggle". No interrupts("10")

Bits 3 set for "restart" ("1")

Bits 2:1 set the clocking source to system clock/16 ("10")

Bit 0 enables/disables the timer ("0")

move.w #$FF2C,D0 ;Setup the Timer mode register (TMR1)

move.w D0,TMR1 ;; Bit 1 is set to 0 to disable the timer

move.w #$0000,D0 ; writing to the timer counter with any value resets it

to zero

move.w D0,TCN1 ;

TRR1 register

The TRR register is set to $AFAF. The timer will count up to this value (TCN = TRR), toggle

the "TOUT" pin, and reset the TCN to $0000.

move.w #$AFAF,D0 ;Setup the Timer reference register (TRR1)

move.w D0,TRR1

Other registers used for TIMER 1

TCR1 ;TIMER1 Capture Register, 16-bit, R

TER1 ;TIMER1 Event Register, 8-bit, R/W

Timer 2

TMR2 register

Bits 15:8 set the prescale to 127 ($7F)

Bits 7:6 set the capture mode and interrupt ("00")

Bits 5:4 set the output mode for "pulse" and no interrupt ("00")

Bits 3 set for free-running ("0")

Bits 2:1 set the clocking source to clk/16 ("10")

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