TMS320F28388D: One question of ePWM Trip-Zone.

Luke Chen

Part Number: TMS320F28388D

Hi all,

According to TRM, the INPUT1, INPUT2, INPUT3 and INPUT6 of Input X-BAR connect to ePWM TRIP1, TRIP2, TRIP3 and TRIP6 directly.

I don't see the connections of these TRIPs in Trip-Zone block diagram, how can I use these TRIPs? Are these also for ePWM Trip-Zone please?

Regards,

Luke

over 5 years ago

0 Nima Eskandari over 5 years ago

TI__Guru 52020 points

They are known as TZ1, etc, in TZ module.

0 Luke Chen over 5 years ago in reply to Nima Eskandari

TI__Expert 5090 points

Hi Nima,

Please refer to Figure 26-50, GPIO MUX-to-Trip Input Connectivity in TRM. It shows us TZ1 and TRIP1 are different inputs to ePWM modules, etc.

So, I am wondering how to use TRIP1, TRIP2, TRIP3 and TRIP6, would you please advise more about this?

Regards,

Luke

0 Luke Chen over 5 years ago in reply to Nima Eskandari

TI__Expert 5090 points

Hi NIma,

Any idea please?

Luke

0 Nima Eskandari over 5 years ago in reply to Luke Chen

TI__Guru 52020 points

TRIPINx is the name of the inputs to the DC (Digital Compare) submodule of the EPWM peripheral. If you want to use TRIPINx you need to use the DC submodule which we do have examples for.

TRIPIN1 is the same as TZ1

TRIPIN2 is the same as TZ2

TRIPIN3 is the same as TZ3

starting from TRIPIN4, the TRIPINx come from EPWM XBAR.

0 Luke Chen over 5 years ago in reply to Nima Eskandari

TI__Expert 5090 points

Nima,

According to Figure 26-50 in F2838x TRM, it shows that TRIP6 connects to Input-XBAR INPUT6 directly, not go through ePWM-XBAR. Does it mean we can also use TRIP6 as a GPIO TZ signal via Input-XBAR INPUT6?

Regards,

Luke

0 Nima Eskandari over 5 years ago in reply to Luke Chen

TI__Guru 52020 points

Yes, not all TRIPINx x>3 are from EPWM XBAR. only some are. The DC module overview diagram in the TRM shows where the signals come from.

4,5,7,8,9,10,11,12 come from EPWM XBAR. The rest have specific sources.

TZ4 TZ5 and TZ6 are different from TRIPIN4,5 and 6

Nima

0 Nima Eskandari over 5 years ago in reply to Nima Eskandari

TI__Guru 52020 points

TZ4 is EQEPERR

TZ5 is CLKFAIL

TZ6 is one of the CPU EMUSTOP signals.

0 Luke Chen over 5 years ago in reply to Nima Eskandari

TI__Expert 5090 points

Nima,

I understand TRIP4 - TRIP6 are not TZ4 - TZ6.

Input-XBAR INPUT4 and INPUT5 can connect to TRIP4 and TRIP5 of DC compare module via ePWM-XBAR. Then how can I use TRIP6 since it is connected to INPUT6 directly? And what's the function of ePWM TRIP6?

Regards,

Luke

0 Nima Eskandari over 5 years ago in reply to Luke Chen

TI__Guru 52020 points

TRIPIN6 = INPUTXBAR INPUT6, there is nothing you need to do to additionally configure it.

ePWM TRIPIN6 can be used to TRIP ePWM outputs using the DC module.

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TMS320F28388D: One question of ePWM Trip-Zone.