xe1205 Semtech Corporation, xe1205 Datasheet - Page 31

• Manufacturer Part Number: xe1205
• Description: Low-power, High Link Budget Integrated Uhf Transceiver
• Manufacturer: Semtech Corporation

Name
Tx_stopped
Start_full
RSSI_int
RSSI_signal_detect 2
RSSI_thr
7.2.4
The detailed description of the TXParam register is given in Table 19.
Name
Power(1:0)
/Modul
Filter
RESERVED
Fix_bsync
RESERVED
7.2.5
The detailed description of the RXParam register is given in Table 20.
Name
Disable_bitsync
BW(1:0)
Max_BW
© Semtech 2007
TXParam configuration register (transmitter configuration parameters)
RXParam configuration register (receiver configuration parameters)
Bits
7-6
5
4
3-2
1
0
Bits
7
6-5
4
Bits
5
4
3
1-0
Address
7
7
7
7
7
7
Address RW
6
6
6
6
6
Address
8
8
8
RW
r/w
r/w
r/w
r/w
r/w
r/w
r
r/w
r/w
r/w/c
r/w
Table 18: IRQParam configuration register
Table 19: TXParam configuration register
RW
r/w
r/w
r/w
Description
Transmitter output power:
00 -> 0 dBm
01 -> 5 dBm
10 -> 10 dBm
11 -> 15 dBm
Inhibition of the modulation in transmitter mode:
0 -> modulation
1 -> no modulation
Pre-filtering of the bit stream in transmitter mode:
0 -> no filtering
1-> data shaping filter enabled
RESERVED
0 -> bit sync in normal environment
1-> bit sync in noisy environment
RESERVED
Description
Transmission stopped ( IRQ source)
0 -> Start transmission when the FIFO is full
1 -> Start transmission when FIFO is not empty (/fifoempty =
Enable interrupt RSSI_irq when RSSI_thr is reached:
0 -> no interrupt generated
1 -> interrupt allowed
Detection of a signal above RSSI_thr (IRQ source)
0 -> signal power lower than the threshold defined by RSSI_thr.
1 -> signal power equal or greater than the threshold defined by RSSI_thr
Writing
RSSI threshold for interrupt
00 -> input power
01 -> input power
10 -> input power
11 -> input power
all bit rates defined by Br are available
frequency deviations given in Table 11 are available
Description
Bit synchronizer on/off:
0 -> ON
1 -> OFF
Bandwidth of the base band filter(SSB): must be
00 -> 10 kHz
01 -> 20 kHz
10 -> 40 kHz
11 -> 200 kHz
Forces the bandwidth of the base band filter to its maximum value
clear RSSI_signal_detect
31
VTHR1
VTHR2
VTHR3
VTHR3
XE1205
Freq_dev + Br/2
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