Diesel Version 5:CV 9: Difference between revisions
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{{Infobox | {{Infobox | ||
|title = NMRA CV | |title = NMRA CV 9 | ||
|header1 = PWM period | |header1 = PWM period | ||
|label2 = Range of Values | |label2 = Range of Values | ||
| Line 8: | Line 8: | ||
}} | }} | ||
== NMRA CV 9 | == NMRA CV 9 - Total PWM Period == | ||
THIS FEATURE IS NOT (YET) SUPPORTED BY THE WOWDIESEL V5 | |||
The value of CV#9 sets the nominal PWM period at the decoder output and therefore the frequency is proportional to the reciprocal of the value. <br> | The value of CV#9 sets the nominal PWM period at the decoder output and therefore the frequency is proportional to the reciprocal of the value. <br> | ||
The recommend formula for PWM period should be: <br><br> | The recommend formula for PWM period should be: <br><br> | ||
Latest revision as of 21:07, 27 September 2018
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NMRA CV 9 - Total PWM Period
THIS FEATURE IS NOT (YET) SUPPORTED BY THE WOWDIESEL V5
The value of CV#9 sets the nominal PWM period at the decoder output and therefore the frequency is proportional to the reciprocal of the value.
The recommend formula for PWM period should be:
PWM period (uS) = (131 + MANTISSA x 4)x 2 EXP
Where MANTISSA is in bits 0-4 bits of CV#9 (low order) and EXP is bits 5-7 for CV#9. If the value programmed into CV-9 falls outside a decoder's capability, it is suggested (but not required) that the decoder "adjust" the value to the appropriate highest or lowest setting supported by the decoder