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XE1205
Name
Tx_stopped
Start_full
Bits
5
4
Address
6
6
RW
r
r/w
Description
Transmission stopped ( IRQ source)
0 -> Start transmission when the FIFO is full
1 -> Start transmission when FIFO is not empty (/fifoempty = ‘1’)
RSSI_int
3
6
r/w
Enable interrupt RSSI_irq when RSSI_thr is reached:
0 -> no interrupt generated
1 -> interrupt allowed
RSSI_signal_detect
2
6
r/w/c
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 ‘1’ clear RSSI_signal_detect
RSSI_thr
1-0
6
r/w
RSSI threshold for interrupt
00 -> input power ≥ VTHR1
01 -> input power ≥ VTHR2
10 -> input power ≥ VTHR3
11 -> input power ≥ VTHR3
Table 18: IRQParam configuration register
7.2.4
TXParam configuration register (transmitter configuration parameters)
The detailed description of the TXParam register is given in Table 19.
Name
Power(1:0)
Bits
7-6
Address
7
RW
r/w
Description
Transmitter output power:
00 -> 0 dBm
01 -> 5 dBm
10 -> 10 dBm
11 -> 15 dBm
/Modul
5
7
r/w
Inhibition of the modulation in transmitter mode:
0 -> modulation
1 -> no modulation
Filter
4
7
r/w
Pre-filtering of the bit stream in transmitter mode:
0 -> no filtering
1-> data shaping filter enabled
all bit rates defined by Br are available
frequency deviations given in Table 11 are available
RESERVED
Fix_bsync
3-2
1
7
7
r/w
r/w
RESERVED
0 -> bit sync in normal environment
1-> bit sync in noisy environment
RESERVED
0
7
r/w
RESERVED
Table 19: TXParam configuration register
7.2.5
RXParam configuration register (receiver configuration parameters)
The detailed description of the RXParam register is given in Table 20.
Name
Disable_bitsync
Bits
7
Address
8
RW
r/w
Description
Bit synchronizer on/off:
0 -> ON
1 -> OFF
BW(1:0)
6-5
8
r/w
Bandwidth of the base band filter(SSB): must be ≥ Freq_dev + Br/2
00 -> 10 kHz
01 -> 20 kHz
10 -> 40 kHz
11 -> 200 kHz
Max_BW
4
8
r/w
Forces the bandwidth of the base band filter to its maximum value
? Semtech 2008
31
www.semtech.com
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