XE1203 Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Fabricante

XE1203

433MHz / 868MHz / 915MHz Low-power, integrated UHF transceiver

Unspecified 

Data Sheet

XE1203

FSParam_Br

1111110

0111111

0011111

0001111

0000111

0000011

0000001

others

Bit rate (bps)

1200

2400

4800

9600

19200

38400

76800

153000

If ADParam_enable_konex is high, then the filtering option is available for a bit rate of 32.7 kbps and one of the

frequency deviations defined above.

4.1.12 Barker encoding.

When using the barker encoding in transmitter mode, the RTParam_barker parameter has to be set to “1” and the

information data stream at 1154 bps is applied through the pin DATA or DATAIN according to the

ADParam_disable_data_bidir parameter. This data is spread into a chip stream at 12.7 Kchps into the barker encoder.

This chip stream is directly applied to the frequency synthesizer without any pre-filtering.

The DCLK pin is used for data clock in the transmission mode and this clock is generated by XE1203. The DCLK is

applied to the microcontroller, at the falling edge of the each clock a new data bit is supplied by microcontroller.

The data is sampled by XE1203 at the rising edge of DCLK and spread by using an 11-bit length Barker code. The

following figure shows the data exchange during the transmission mode when barker option is used.

dclk

@1154 Hz

information data

from a microcontroller

bit0

bit rate = 1154 bps

bit1

bit2

bit3

bit4

bit5

bit6

Spread data

@12.7 Kchps

spread

bit0

spread spread

bit1

bit2

spread

bit3

spread

bit4

spread

bit5

Figure 10 Data exchange during transmission mode.

17

D0308-214

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