TMS570LS1224: Trip Zone on TZ3 N2HET1[10]:

Bindu Ganesh

Prodigy 220 points

Part Number: TMS570LS1224

Tool/software:

Hi,

I'm referring to my product code, a 5 years back code basically.

I see in my product schematics N2HET1[10]/TZ3 i.e Trip zone 3 is connected to one of the device

But, when i refer in code i see pwmStart (hetRAM1, 1U); corresponds to TZ3.

I'm not able to corelate is that parameter 1U corresponds to PWM1?

If so, which halogen generated file, where i can find information where PWM1 is muxed with TZ3?

Note:- At present we don't have halogen settings, which was done 5 years back.

over 2 years ago

0 jagadish gundavarapu over 1 year ago

TI__Guru* 79736 points

Hi Bindu,

Bindu Ganesh said:
I see in my product schematics N2HET1[10]/TZ3 i.e Trip zone 3 is connected to one of the device

But, when i refer in code i see pwmStart (hetRAM1, 1U); corresponds to TZ3.

I'm not able to corelate is that parameter 1U corresponds to PWM1?

If so, which halogen generated file, where i can find information where PWM1 is muxed with TZ3?

Don't combine the N2HET1[10] and TZ3 signals because they both are for different modules.

TZ3 is a trip zone signal in ePWM module, and which is an input and we cannot use this functionality for PWM generation.

Bindu Ganesh said:
But, when i refer in code i see pwmStart (hetRAM1, 1U); corresponds to TZ3.

In your case the PWM is clearly generated using N2HET functionality. Which is default functionality of this multiplexed pin.

And i already explained on how to change the N2HET pin number for PWM generation in other thread of you:

(+) TMS570LS1224: How can this pin be configured as PWM "N2HET1[10]" - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

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Thanks & regards,
Jagadish.