MSPM0G1506: External oscillator input port

Kotaro Kamitani

Part Number: MSPM0G1506

Tool/software:

The MSPM0G1X0X has two input ports (LFXIN, LFCLK_IN) for external low-frequency clocks.

I would like to input and use a digital signal from an oscillator, but due to the surrounding wiring I would like to use the LFXIN pin instead of LFCLK_IN.

The LFXOUT pin will be designed as an open port.

Are there any inconveniences that could arise in this case?

over 1 year ago

0 Cash Hao11 over 1 year ago

TI__Mastermind 46765 points

Hi,

What do you mean by "input and use a digital signal from an oscillator"? If you are plan to use a digital signal input, then you must use LFCLK_IN pin as its input pin. The LFXIN could not be used for digital signal input.

Best regards,

Cash Hao

0 Kotaro Kamitani over 1 year ago in reply to Cash Hao11

Prodigy 10 points

Thank you for your reply.

As you wrote, I am trying to use the LFXIN pin as a digital signal input.

I checked 7.9.4 Low Frequency Crystal/Clock in the datasheet and the user manual, but could not find any problems with the specifications.

The frequency range and duty ratio of LFCLK_IN are stricter.

What is the problem?

Is it the voltage level or the status of the LFXOUT pin?

Best regards,
Kamitani

0 Cash Hao11 over 1 year ago in reply to Kotaro Kamitani

TI__Mastermind 46765 points

Hi,

It is just that the LFXIN is not designed with the ability to accept digital input signal.

Best regards,

Cash Hao

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MSPM0G1506: External oscillator input port