F28M36P63C2: Oscillator trim

a a46387

Part Number: F28M36P63C2

Hello,

I would like to ask how to adjust the oscillator trim and compensate for frequency drift in the F28M36.

It seems that the register SysCtrlRegs.INTOSC1TRIM.all (inherited from previous C2000 devices) is not available for the C2000+ARM device.

Thanks in advance.

over 8 years ago

0 tlee over 8 years ago

TI__Guru 62975 points

Correct, there is no internal oscillator trim on the F28M3x series of devices:

0 Hareesh Janakiraman over 8 years ago

TI__Guru* 95315 points

Oscillator trim is not supported on this device.

0 a a46387 over 8 years ago in reply to Hareesh Janakiraman

Prodigy 20 points

Thank you very much for the reply.

So, is there any option to slightly change the clock at run time?

We can change the timer interrupt easily, but the precision is not enough for our system.

Any idea will be appreciated.

We are using the control card TMDSCNDC28M36.

Best regards.

0 tlee over 8 years ago in reply to a a46387

TI__Guru 62975 points

Please re-read the datasheet snippet. The internal oscillator should NOT be used to clock the device during normal operation. You will need to use an external 3.3V clock or crystal.

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F28M36P63C2: Oscillator trim