SM1212E433 Semtech, SM1212E433 Datasheet - Page 63

• Manufacturer Part Number: SM1212E433
• Description: RF Module For SX1212
• Manufacturer: Semtech
• Series: -r
• Type: Transceiver, ISMr

Specifications of SM1212E433

• Frequency: 433MHz
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: SX1212E

Name
OOK_Thresh
RSSI_val
OOK_thresh_step
OOK_thresh_dec
_period
OOK_avg_thresh
_cutoff
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)
Rev 2 – June 18th, 2009
ADVANCED COMMUNICATIONS & SENSING
6.5. Sync Word Parameters - SYNCParam
Bits
7-0
7-0
7-5
4-2
1-0
Bits
7-0
7-0
7-0
7-0
Address (d)
19
20
21
21
21
Address (d)
22
23
24
25
RW
r/w
r
r/w
r/w
r/w
RW
r/w
Description
OOK fixed threshold or min threshold in peak mode. By default at 6dB.
(d): “00000100” assuming 0.5dB RSSI step.
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
001
010
011
Period of decrement of the RSSI threshold in the OOK demodulator:
000
001
010
011
100
101
110
111
Cutoff frequency of the averaging for the average mode of the OOK
threshold in demodulator
00
01
10
11
Description
1
(d): “00000000”
2
(d): “00000000”
3
(d): “00000000”
4
(d): “00000000”
st
nd
rd
th
Byte of Sync word
Byte of Sync word (only used if Sync_size = 11)
Byte of Sync word (only used if Sync_size = 1x)
f
Reserved
Reserved
f
Byte of Sync word (only used if Sync_size ≠ 00)
C
C
Page 63 of 77
0.5 dB (d)
1.0 dB
1.5 dB
2.0 dB
once in each chip period (d)
once in 2 chip periods
once in 4 chip periods
once in 8 chip periods
twice in each chip period
4 times in each chip period
8 times in each chip period
16 times in each chip period
≈ BR / 8.π (d)
≈ BR / 32.π
101
110
111
100
4.0 dB
5.0 dB
6.0 dB
3.0 dB
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SX1212