MC34VR500 SW REGISTER

[k-negishi]

Dear all

I 'm using this device, and I can program voltage via I2C.

But I have some question about document of this.

<1st >

In Newest Document( Rev9.0) , Volt register has 7bit (SW2~SW4 ).

And bit #6 is defined by OTP.  What's mean OTP? 

Is this hard-coded configuration?

Or does this device have OTP? 

And if I use OTP,  I don't have to use internal RAM to change configuration?

<2nd>

I want to change voltage during   normal operating.

But I can't do this.

Can I change this?

Best regards!

[guoweisun]

Hi

OTP means one time program.

For this device there is no blank version for customer operate OTP by themselves,but you can change the output voltage by IIC to operate corresponding registers.

[k-negishi]

Hi

thanks for reply.

Now I understand that OTP version is providing.

Yes,I know I can change settings via i2c

and I already do that.

But I want to use this without CPU in some other design. In that case,OTP must be best chiose.

thanks for your information.

By the way,how about to change voltage during normal operating?

Can I change it?

Best regards!

[guoweisun]

For example you can read datasheet page38 table41 for more explain.