CC1070-RTY1 datasheet(21/57 Pages) TI2

21 / 57 page

CC1070

SWRS043A

Page 21 of 54

Manchester encoding and decoding

In the Synchronous Manchester encoded

mode

CC1070 uses Manchester coding

when

modulating

the

data.

The

Manchester code is based on transitions;

a “0” is encoded as a low-to-high

transition, a “1” is encoded as a high-to-

low transition. See Figure 11.

The Manchester code ensures that the

signal has a constant DC component,

which

necessary

some

FSK

receivers/demodulators. Using this mode

also

ensures

compatibility

with

e.g.

CC400/CC900 designs.

DCLK

"RF"

Clock provided by

CC1070

Data provided by

microcontroller

FSK modulating signal

internal in CC1070

Figure 8. Synchronous NRZ mode

DCLK

"RF"

Clock provided by

CC1070

Data provided by

microcontroller

FSK modulating signal

internal in CC1070

Figure 9. Synchronous Manchester encoded mode

DCLK

"RF"

DCLK is not used. It can be

set to default low or high.

Data provided by

microcontroller

FSK modulating signal

internal in CC1070

Figure 10. Transparent Asynchronous UART mode

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