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[FAQ] RF synthesizers: If the datasheet shows all 1’s and 0’s in the register maps, do I have to program them?

Some registers in the register maps do not have configurable register bits but they are fixed to some 1's and 0's, do we have to program these registers?

  • For a particular register, if the suggested register value does not equal to POR (silicon default) value, yes, it is required to be programmed once after Vcc power up or after a RESET.
    One exemption is when it is a read only register.