Strange behaviour of GTM ATOM output in SOMP mode with force update

[FD_aurix]

Hi All

I'm facing to a strange behaviour using the ATOM. I've set the channel 0 of ATOM1 as reference and using the following channel (CH1,2,3,4) to create multiple PWM signal using CM0 and CM1 as up and down edge. so far so good.

 I'll do an additional update (via force update signal) and here I've a spike  

if I change the CM1 from 0 to 1 or period-1 this spike is no more present.

any idea? HW issue?

Below the setting of the PWM for the reference anc CH1, other CH are the same as CH1

[FD_aurix]

little update, the CH4 works different because the DTM is enabled for this channel that probably filter this spike for some reason, others channel do not have the DTM enabled

[FD_aurix]

Hi

Anyone could give some feedback/ideas?  I've done a short test making the same configuration with TOM channels and here seems not present 😕

[TBencher]

Hi FD_aurix,

GTM is always fun 🙂

Please could you give me a little bit more detail on what TC and board you are using?

Best regards,

TBencher

[FD_aurix]

Hi TBencher

Not so fun... when it is driving a power bridge..   Looking at the errata sheet there are some similar issue but in different conditions.. 

BTW it is a TC377 and the board is the relative Triboard. I've already contacted the FAE and he is checking with the core design team.

[TBencher]

Hi FD_aurix,

ok then let's wait for the FAE and the core design team.
If they have no clue, I will start investigating it 🙂

Best regards,

TBencher