I have a question about Polarity Select Registers (PWMPOLx) for ADSP-214xx.
Currently, I am checking Page A-72 of HRM.
I want to clarify the meaning of "0 = Channel AL polarity 0" and "1 = Channel
AL polarity 1 (default)" which is described in Table A-40.
My understanding is as follows.
"0 = Channel AL polarity 0" -> Active Low
"1 = Channel AL polarity 1 (default)" -> Active High
Actually the bits “PWM_POL1AL” and “PWM_POL0AL” are “Write 1 to set” bits. For
example, if you would like to set the AL’s polarity to active high, you need to
set the bit PWM_POL1AL. Similarly to set the AL’s polarity to active low, the
bit PWM_POL0AL should be set.