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SX1211
WIRELESS & SENSING
Name
Res
RSSI_val
Bits
7-0
7-0
Address (d)
19
20
RW
r/w
r
Description
Reserved
(d): “00000111”
RSSI output, 0.5 dB / bit
Note: READ-ONLY (not to be written)
Size of each decrement of the RSSI threshold in the OOK demodulator
000
0.5 dB (d) 100
3.0 dB
OOK_thresh_step
7-5
21
r/w
001
1.0 dB 101
4.0 dB
010
011
1.5 dB 110
2.0 dB 111
5.0 dB
6.0 dB
Period of decrement of the RSSI threshold in the OOK demodulator:
000
001
once in each chip period (d)
once in 2 chip periods
OOK_thresh_dec
_period
4-2
21
r/w
010
011
100
once in 4 chip periods
once in 8 chip periods
twice in each chip period
101
110
111
4 times in each chip period
8 times in each chip period
16 times in each chip period
Cutoff frequency of the averaging for the average mode of the OOK
threshold in demodulator
OOK_avg_thresh
_cutoff
1-0
21
r/w
00
01
f C ≈ BR / 8. π (d)
Reserved
10
11
Reserved
f C ≈ BR / 32. π
6.5. Sync Word Parameters - SYNCParam
The detailed description of the SYNCParam register is given in Table 30.
Table 30: SYNCParam Register Description
Name
Sync_value(31:24)
Sync_value(23:16)
Sync_value(15:8)
Sync_value(7:0)
Bits
7-0
7-0
7-0
7-0
Address (d)
22
23
24
25
RW
r/w
Description
1 st Byte of Sync word
(d): “00000000”
2 nd Byte of Sync word (only used if Sync_size ≠ 00)
(d): “00000000”
3 rd Byte of Sync word (only used if Sync_size = 1x)
(d): “00000000”
4 th Byte of Sync word (only used if Sync_size = 11)
(d): “00000000”
Rev 8 – February 2013
Page 63 of 92
www.semtech.com
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