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455A Datasheet, PDF (41/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER | |||
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455A Group
Timer 2 count start timing (R2L = â0216â, R2H = â0216â, W23 = â1â)
Machine cycle
Timer 2 count source
(XIN input)
Register W21
Timer 2 count value
(reload register)
Timer 2 underflow signal
PWM signal
Mi
Mi + 1
Mi + 2
TW2A instruction execution (W21â1)
Mi + 3
0216
(R2L)
0116
0016
0216 0116
(R2H)
0016
0216
(R2L)
Timer 2 count start timing
Timer 2 count stop timing (R2L = â0216â, R2H = â0216â, W23 = â1â)
Machine cycle
Timer 2 count source
(XIN input)
Register W21
Timer 2 count value
(reload register)
Timer 2 underflow signal
Mi
Mi + 1
Mi + 2
Mi + 3
TW2A instruction execution (W21â0)
0216 0116
(R2H)
0016
0216 0116
(R2L)
0016
(R2H)
0216
PWM signal
(Note 1)
Timer 2 count stop timing
Notes 1: If the timer count stop timing and the timer underflow timing overlap while the CNTR pin output
is valid (W23=â1â), a hazard may occur in the PWM signal waveform.
2: When timer count is stopped during âHâ interval of the PWM signal, timer is stopped after
the end of the âHâ output interval.
Fig 39. Timer count start/stop timing
Rev.1.01 Feb 15, 2008 Page 41 of 146
REJ03B0224-0101
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