ADF5610 datasheet(42/48 Pages) AD

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ADF5610

Preliminary Technical Data

Rev. PrE | Page 42 of 48

VCO TUNE REGISTER

The VCO tune register is a read only register.

Table 27. Register 0x10, VCO Tune Register (Default 0x000020)

Bit

Type

Name

Width

Default

Description

7:0

VCO switch

setting

Indicates the VCO switch setting selected by the autocalibration state machine to

yield the nearest free running VCO frequency to the desired operating frequency.

Not valid when Register 0x10[8] = 1, autocalibration busy. When a manual change is

made to the VCO switch settings, this register does not indicate the current VCO

switch position. VCO subsystems may not use all the MSBs, in which case the

unused bits are don’t care bits.

0 = highest frequency.

1 = second highest frequency.

…

255 = lowest frequency.

Autocalibration

busy

Busy when the autocalibration state machine is searching for the nearest switch

setting to the requested frequency.

SUCESSIVE APPROXIMATION REGISTER

The successive approximation register (SAR) is a read only register.

Table 28. Register 0x11, Successive Approximation Register (Default 0x07FFFF)

Bit

Type

Name

Width

Default

Description

18:0

SAR error magnitude counts

219 to 1

SAR error magnitude counts

SAR error sign

0 = error is positive

1 = error is negative

GENERAL-PURPOSE 2 REGISTER

The GPO2 register is a read only register.

Table 29. Register 0x12, GPO2 Register (Default 0x000000)

Bit

Type

Name

Width

Default

Description

GPO

GPO state

Lock detect

Lock detect status

1 = locked

0 = unlocked

BUILT-IN SELF TEST (BIST) REGISTER

The BIST register is a read only register.

Table 30. Register 0x13, BIST Register (Default 0x001259)

Bit

Type

Name

Width

Default

Description

16:0

Reserved

4697d

Reserved

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