CC1020-RTR1 datasheet(75/95 Pages) TI1

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CC1020

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SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015

Table 5-41. ANALOG Register (17h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

ANALOG[7]

BANDSELECT

—

Frequency band selection

0: 402 to 470 MHz band

1: 804 to 960 MHz band

ANALOG[6]

LO_DC

—

Lower LO DC level to mixers

0: High LO DC level to mixers

1: Low LO DC level to mixers

Recommended settings:

LO_DC=1 for 402 to 470 MHz,

LO_DC=0 for 804 to 960 MHz.

ANALOG[5]

VGA_BLANKING

Enable analog blanking switches in VGA when changing VGA

gain.

0: Blanking switches are disabled

1: Blanking switches are turned on for approx. 0.8

μs when

gain is changed (always on if AGC_DISABLE=1)

Recommended setting: VGA_BLANKING=0.

ANALOG[4]

PD_LONG

Selects short or long reset delay in phase detector

0: Short reset delay

1: Long reset delay

Recommended setting: PD_LONG=0.

ANALOG[3]

—

Reserved, write 0

ANALOG[2]

PA_BOOST

Boost PA bias current for higher output power

Recommended setting: PA_BOOST=1.

ANALOG[1:0]

DIV_BUFF_CURRENT[1:0]

—

Overall bias current adjustment for VCO divider and buffers

0: 4/6 of nominal VCO divider and buffer current

1: 4/5 of nominal VCO divider and buffer current

2: Nominal VCO divider and buffer current

3: 4/3 of nominal VCO divider and buffer current

Recommended setting: DIV_BUFF_CURRENT=3

Table 5-42. BUFF_SWING Register (18h)

DEFAULT

NAME

ACTIVE

DESCRIPTION

VALUE

BUFF_SWING[7:6]

PRE_SWING[1:0]

—

Prescaler swing.

0: 2/3 of nominal swing

1: 1/2 of nominal swing

2: 4/3 of nominal swing

3: Nominal swing

Recommended setting: PRE_SWING=0.

BUFF_SWING[5:3]

RX_SWING[2:0]

—

LO buffer swing, in RX (to mixers)

0: Smallest load resistance (smallest swing)

…

7: Largest load resistance (largest swing)

Recommended setting: RX_SWING=2.

BUFF_SWING[2:0]

TX_SWING[2:0]

—

LO buffer swing, in TX (to power amplifier driver)

0: Smallest load resistance (smallest swing)

…

7: Largest load resistance (largest swing)

Recommended settings:

TX_SWING=4 for 402 to 470 MHz,

TX_SWING=0 for 804 to 960 MHz.

Detailed Description

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