ADF4401ABCEZ datasheet(37/39 Pages) AD

37 / 39 page

Data Sheet

ADF4401A

Rev. 0 | Page 37 of 39

Address: 0x6E, Default: 0x00, Name: REG006E

Open-Loop VCO Counter Readback.

[7:0] VCO_DATA_READBACK[7:0] (R)

Table 51. Bit Descriptions for REG006E

Bit(s)

Bit Name

Description

Default

Access

[7:0]

VCO_DATA_READBACK[7:0]

Open-Loop VCO Counter Readback.

0x0

Address: 0x6F, Default: 0x00, Name: REG006F

Open-Loop VCO Counter Readback.

[7:0] VCO_DATA_READBACK[15:8] (R)

Table 52. Bit Descriptions for REG006F

Bit(s)

Bit Name

Description

Default

Access

[7:0]

VCO_DATA_READBACK[15:8]

Open-Loop VCO Counter Readback.

0x0

Address: 0x72, Default: 0x32, Name: REG0072

Internal RF Output Frequency Select.

Power-Down Internal RF Buffer.

Internal RF Output Power.

[7] RESERVED

[2:0] RESERVED

[6] AUX_FREQ_SEL (R/W)

[3] PDB_AUX (R/W)

[5:4] POUT_AUX (R/W)

Table 53. Bit Descriptions for REG0072

Bit(s)

Bit Name

Description

Default

Access

RESERVED

Reserved.

0x0

AUX_FREQ_SEL

Internal RF Output Frequency Select. This selects the VCO fundamental or divided

frequency to the downconversion mixer.

0x0

R/W

0: divided output.

1: VCO output.

[5:4]

POUT_AUX

Internal RF Output Power. Sets the power at the auxiliary RF port, which drives the mixer

path.

0x1

R/W

0: low power.

1: high power.

PDB_AUX

Power-Down Internal RF Buffer. This must be set to 1 for normal operation.

0x1

R/W

[2:0]

RESERVED

Reserved.

0x2

Address: 0x73, Default: 0x00, Name: REG0073

Lock Detector Count Divider.

Dis able ADC clock.

Power-Down N divider.

[7:3] RESERVED

[0] LD_DIV (R/W)

[2] ADC_CLK_DISABLE (R/W)

[1] PD_NDIV (R/W)

Table 54. Bit Descriptions for REG0073

Bits

Bit Name

Description

Default

Access

[7:3]

RESERVED

Reserved.

0x0

ADC_CLK_DISABLE

Disable ADC Clock. ADC_ENABLE setting overwrites this bit.

0x0

R/W

PD_NDIV

Power-Down N Divider.

0x0

R/W

LD_DIV

Lock Detector Count Divider. Divides the lock detector count cycles by 32 so that the

LD_COUNT bits in the REG0028 register can be selected as 32, 64, 128, and 256.

0x0

R/W

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