CC1070-RTY1 datasheet(47/57 Pages) TI2

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CC1070

SWRS043A

Page 47 of 54

ANALOG Register (17h)

NAME

Default

value

Active

Description

ANALOG[7]

BANDSELECT

Frequency band selection

0: 402-470 MHz band

1: 804-940 MHz band

ANALOG[6]

reserved

ANALOG[5]

reserved

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 (spare register)

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 settings:

DIV_BUFF_CURRENT=3

BUFF_SWING Register (18h)

NAME

Default

value

Active

Description

BUFF_SWING[7:6]

PRE_SWING[1:0]

Prescaler swing. Fractions for PRE_CURRENT=0:

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]

reserved

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 402-470 MHz

TX_SWING=0 for 804-940 MHz.

BUFF_CURRENT Register (19h)

NAME

Default

value

Active

Description

BUFF_CURRENT[7:6]

PRE_CURRENT[1:0]

Prescaler current scaling

0: Nominal current

1: 2/3 of nominal current

2: 1/2 of nominal current

3: 2/5 of nominal current

Recommended setting: PRE_CURRENT=0.

BUFF_CURRENT[5:3]

reserved

BUFF_CURRENT[2:0]

TX_CURRENT[2:0]

LO buffer current, in TX (to PA driver)

0: Minimum buffer current

…

7: Maximum buffer current

Recommended settings:

TX_CURRENT=2 for 402-470 MHz

TX_CURRENT=4 for 804-940 MHz.

CC1070-RTY1 数据表(PDF) 47 Page - Texas Instruments

CC1070-RTY1 数据表(HTML) 47 Page - Texas Instruments

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CC1070-RTY1 数据表(PDF) 47 Page - Texas Instruments

CC1070-RTY1 数据表(HTML) 47 Page - Texas Instruments

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