4559 datasheet(40/148 Pages) RENESAS

40 / 148 page

Rev.1.04

Aug 23, 2007

Page 40 of 146

REJ03B0188-0104

4559 Group

Fig 39. Timer count start/stop timing

(R2H)

Timer 2 underflow signal

Machine cycle

Timer 2 count start timing (R2L = “0216”, R2H = “0216”, W23 = “1”)

Mi + 1

Mi + 2

Mi + 3

0216

0016

0116

0216

0016

0116

0216

(R2L)

Timer 2 count start timing

PWM signal

Timer 2 count value

(reload register)

Timer 2 count source

(XIN input)

(R2H)

Mi + 1

Mi + 2

Mi + 3

0016

0116

0216

0016

0116

0216

Timer 2 count stop timing

(R2L)

(R2H)

(Note 1)

TW2A instruction execution (W21

←1)

TW2A instruction execution (W21

←0)

Timer 2 underflow signal

Machine cycle

PWM signal

Timer 2 count value

(reload register)

Timer 2 count source

(XIN input)

Timer 2 count stop timing (R2L = “0216”, R2H = “0216”, W23 = “1”)

Notes 1: If the timer count stop timing and the timer underflow timing overlap while the CNTR pin output

is valid (W23=“1”), a hazard may occur in the PWM signal waveform.

2: When timer count is stopped during “H” interval of the PWM signal, timer is stopped after

the end of the “H” output interval.

4559 Datasheet(PDF) 40 Page - Renesas Technology Corp

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