DS90UB913A-Q1: External Oscillator Mode

Masaaki Sugiyama68

Expert 1445 points

Part Number: DS90UB913A-Q1

Dear Support team;

I'd like to operate in the External Oscillator Mode.

Do I have to define output to GPIO2 and input to GPIO3 at address 0x0E?

Or, are input and output automatically set by mode definition?

B.R

Masaaki Sugiyama

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello Masaaki,

The GPO2 behavior is set automatically by the MODE strapping. Also 913A does not have any GPIO inputs, only GPOs.

Best Regards,

Casey

0 Masaaki Sugiyama68 over 5 years ago in reply to Casey McCrea

Expert 1445 points

Dear Casey-san;

Thank you for your answer.

I have more questions.

When we use registers (0x03[1]=1 and ox35[1:0]=10) to set the External oscillator Mode, does GPO3 become to input automatically?

In this case, can we change the 0x0E register values or Is writing prohibited in this register?

B.R

Masaaki Sugiyama

0 Casey McCrea over 5 years ago in reply to Masaaki Sugiyama68

TI__Guru** 103215 points

Hello Masaaki,

It is recommended to leave register 0x0E at its default value which is input. Then you can change the 0x03 and 0x35 registers to override the MODE strapping as desired.

Best Regards,

Casey

0 Masaaki Sugiyama68 over 5 years ago in reply to Casey McCrea

Expert 1445 points

Dear Casey-san;

Thank you!

I understand.

B.R

Masaaki Sugiyama

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DS90UB913A-Q1: External Oscillator Mode