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dsPIC dead time in center aligned mode

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M.Rehan

M.Rehan

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Can some explain alternate dead time ALTDTR value calculation
Given code and comment is from Microchip reference codes

uController dsPIC33FJ06GS101

Few parameters
ADC and PWM clock is 117.92MHz ((FRC * 16) / APSTSCLR ) = (7.37 * 16) / 1 = 117.92MHz
PWM output is complimentary with center aligned mode



Code: 
ALTDTR1 = 256;                            /* Dead-time setup to 416ns
                                            Dead-time = ALTDTR1<15:0>*1.04ns
                                                                    
                                            = 416ns */

How this dead time "ALTDTR" has been calculated?


according to datasheet formula ALTRTR value is not correct
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