XE1203 ETC1 [List of Unclassifed Manufacturers], XE1203 Datasheet - Page 17

• Manufacturer Part Number: XE1203
• Description: Low-Power, integrated UHF transceiver
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

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
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.
17
from a microcontroller
bit rate = 1154 bps
@1154 Hz
information data
@12.7 Kchps
Spread data
dclk
FSParam_Br
1111110
0111111
0011111
0001111
0000111
0000011
0000001
Figure 10 Data exchange during transmission mode.
bit0
others
spread
bit0
bit1
is spread into a chip stream at 12.7 Kchps into the barker encoder.
spread
bit1
bit2
spread
bit2
Bit rate (bps)
153000
19200
38400
76800
1200
2400
4800
9600
bit3
spread
bit3
bit4
spread
bit4
Data Sheet
XE1203
bit5
D0308-214
spread
bit5
bit6