TMS320F28388D: HRPWM range concept

Hi experts,

When HRPWM is enable, CMPAHR has a range (1-255) like below in TRM

(https://dev.ti.com/tirex/explore/node?node=AM0GA77BJ5qUFa.JunSyDg__gYkahfz__LATEST)

For example, PWM period(N PWM clock cycle)

ePWM clock 200MHz(=5nsec), in up and down count mode.

Carrier frequency 100kHz, ->10usec -> PRD=(10000/2)/5=1000

TBPRDHR=0

If duty = 50%, what count values should we set on CMPA and CMPAHR ?

(In this question, I ignore dead band time because I would like to focus on this topic)  

Although if "CMPAHR = 0" can work correctly, we will do so and CMPA=500.

In my opinion, there are two options.

a) CMPA=499, CMPAHR=255

b) CMPA=500, CMPAHR=1

Could you please let us know how we should set values on CMPAHR to control duty more exactly ?

Best regards,

Hidehiko