Datasheet

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SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
RegPktRssiValue
(0x1A)
7-0
PacketRssi
r
n/a
RSSI of the latest packet received (dBm)
RSSI[dBm] = - 139 +
PacketRssi (when SNR >= 0)
or
RSSI[dBm] = - 139 +
PacketRssi + PacketSnr (when SNR < 0)
RegRssiValue
(0x1B)
7-0
Rssi
r
n/a
Current RSSI value (dBm)
RSSI[dBm] = - 139 +
Rssi
RegHopChannel
(0x1C)
7 PllTimeout r
n/a
PLL failed to lock while attempting a TX/RX/CAD operation
1
 PLL did not lock
0
 PLL did lock
6 CrcOnPayload r n/a
CRC Information extracted from the received packet header
0  Header indicates CRC off
1
 Header indicates CRC on
5-0 FhssPresentChannel r n/a Current value of frequency hopping channel in use.
RegModemConfig
1
(0x1D)
7-6 Bw rw 0x0
Signal bandwidth:
00
 125 kHz
01
 250 kHz
10
 500 kHz
11
 reserved
5-3 CodingRate rw ‘001’
Error coding rate
001
 4/5
010
 4/6
011
 4/7
100
 4/8
All other values
 reserved
In implicit header mode should be set on receiver to determine
expected coding rate. See Section 4.1.1.3.
2 ImplicitHeaderModeOn rw 0x0
0
 Explicit Header mode
1
 Implicit Header mode
1 RxPayloadCrcOn rw 0x0
Enable CRC generation on payload, in implicit header mode this
it determines if receiver should expect a payload CRC.
0  CRC disable
1
 CRC enable
N/A in Receiver mode with Implicit Header mode
0 LowDataRateOptimize rw 0x0
0
 Disabled
1
 Enabled; mandated for SF11 and SF12 with BW = 125 kHz
Name
(Address)
Bits
Variable Name
Mode Reset
LoRa
TM
Description