CC1070-RTY1 datasheet(40/57 Pages) TI

40 / 57 page

CC1070

SWRS043

Page 40 of 58

best range. The length of the

λ/4-

monopole antenna is given by:

L = 7125 / f

where f is in MHz, giving the length in cm.

An antenna for 868 MHz should be 8.2

cm, and 16.4 cm for 433 MHz.

The antenna should be connected as

close as possible to the IC. If the antenna

is located away from the input pin the

antenna should be matched to the feeding

transmission line (50

Ω).

For a more thorough background on

antennas, please refer to Application Note

AN003 SRD Antennas available from the

Chipcon web site.

24 Configuration Registers

The configuration of

CC1070 is done by

programming

the

8-bit

configuration

registers. The configuration data based on

selected system parameters are most

easily found by using the SmartRF® Studio

software. Complete descriptions of the

registers are given in the following tables.

After a RESET is programmed, all the

registers have default values. The TEST

registers also get default values after a

RESET, and should not be altered by the

user.

Chipcon recommends using the register

settings found using the SmartRF® Studio

software. These are the register settings

that

Chipcon

can

guarantee

across

temperature, voltage and process. Please

check the Chipcon web site for regularly

updates to the SmartRF® Studio software.

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