CC1020-RTR1 datasheet(78/95 Pages) TI1

78 / 95 page

CC1020

SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015

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Table 5-49. GAIN_COMP Register (1Fh)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

GAIN_COMP[7:0]

—

Signed compensation value for mixer I/Q gain error. Used for image

rejection calibration.

–128: approx. –1.16 dB adjustment between I and Q gain

–1: approx. –0.004 dB adjustment between I and Q gain

0: approx. +0.004 dB adjustment between I and Q gain

127: approx. +1.16 dB adjustment between I and Q gain

Table 5-50. POWERDOWN Register (20h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

POWERDOWN[7]

PA_PD

Sets PA in power down when PD_MODE[1:0]=2

POWERDOWN[6]

VCO_PD

Sets VCO in power down when PD_MODE[1:0]=2

POWERDOWN[5]

BUFF_PD

Sets VCO divider, LO buffers and prescaler in power-down when

PD_MODE[1:0]=2

POWERDOWN[4]

CHP_PD

Sets charge pump in power down when PD_MODE[1:0]=2

POWERDOWN[3]

LNAMIX_PD

Sets LNA/mixer in power down when PD_MODE[1:0]=2

POWERDOWN[2]

VGA_PD

Sets VGA in power down when PD_MODE[1:0]=2

POWERDOWN[1]

FILTER_PD

Sets image filter in power down when PD_MODE[1:0]=2

POWERDOWN[0]

ADC_PD

Sets ADC in power down when PD_MODE[1:0]=2

Table 5-51. TEST1 Register (21h, for Test Only)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

TEST1[7:4]

CAL_DAC_OPEN[3:0]

—

Calibration DAC override value, active when BREAK_LOOP=1

TEST1[3:0]

CHP_CO[3:0]

—

Charge pump current override value

Table 5-52. TEST2 Register (22h, for Test Only)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

TEST2[7]

BREAK_LOOP

0: PLL loop closed

1: PLL loop open

TEST2[6]

CHP_OVERRIDE

0: use calibrated value

1: use CHP_CO[3:0] value

TEST2[5]

VCO_OVERRIDE

0: use calibrated value

1: use VCO_AO[4:0] value

TEST2[4:0]

VCO_AO[4:0]

—

VCO_ARRAY override value

Table 5-53. TEST3 Register (23h, for Test Only)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

TEST3[7]

VCO_CAL_MANUAL

Enables “manual” VCO calibration (test only)

TEST3[6]

VCO_CAL_OVERRIDE

Override VCO current calibration

0: Use calibrated value

1: Use VCO_CO[5:0] value

VCO_CAL_OVERRIDE controls VCO_CAL_CLK

if VCO_CAL_MANUAL=1. Negative transitions are then used to

sample VCO_CAL_COMP.

TEST3[5:0]

VCO_CO[5:0]

—

VCO_CAL_CURRENT override value

Detailed Description

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