Renesas M16C/6NK Informações Técnicas Página 377

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Rev.2.10 Apr 14, 2006 page 353 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 23. Usage Notes
23.10.1.4 Timer A (Pulse Width Modulation Mode)
The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TAiMR
(i = 0 to 4) register, the TAi register, bits TA0TGL and TA0TGH in the ONSF register, and the TRGSR
register before setting the TAiS bit in the TABSR register to 1 (count starts).
Always make sure the TAiMR register, bits TA0TGL and TA0TGH, and the TRGSR register are modified
while the TAiS bit remains 0 (count stops) regardless whether after reset or not.
The IR bit is set to 1 when setting a timer operating mode with any of the following procedures:
Select pulse width modulation mode after reset.
Change an operating mode from timer mode to pulse width modulation mode.
Change an operating mode from event counter mode to pulse width modulation mode.
To use the timer Ai interrupt (the IR bit), set the IR bit to 0 by program after the above listed changes
have been made.
When setting TAiS bit to 0 (count stops) during PWM pulse output, the following action occurs:
Stop counting.
When TAiOUT pin is output H, output level is set to L and the IR bit is set to 1.
When TAiOUT pin is output L, both output level and the IR bit remain unchanged.
______
If a low-level signal is applied to the NMI pin when the IVPCR1 bit in the TB2SC register = 1 (three-phase
______
output forcible cutoff by input on NMI pin enabled), pins TA1OUT, TA2OUT, and TA4OUT go to a
high-impedance state.
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