Semtech LR1121 Manuals

Manuals and User Guides for Semtech LR1121. We have 1 Semtech LR1121 manual available for free PDF download: User Manual

Semtech LR1121 User Manual (130 pages)

Brand: Semtech | Category: Transceiver | Size: 3.75 MB

Table of Contents
3
Introduction
12
Scope
12
Overview
12
Figure 1-1: LR1121 Block Diagram
12
System Processes
13
System Modes
13
Figure 2-1: LR1121 Modes and Transitions
13
Boot
14
Standby
14
Figure 2-2: Bootloader
14
Table 2-1: Setstandby Command
14
Calibrations
15
Table 2-2: Calibimage Command
15
Table 2-3: ISM Band Values
15
Power down
16
Table 2-4: Calibrate Command
16
Table 2-5: Calibparams Parameter
16
Sleep
17
Table 2-6: Setsleep Command
17
Table 2-7: Sleepconfig Parameter
17
Table 2-8: Sleep Mode Summary
17
Reset
18
Table 2-9: Reboot Command
18
RX Mode
19
TX Mode
19
FS Mode
20
Startup Sequence
20
Table 2-10: Setfscommand
20
Firmware Upgrade
21
Getversion
21
Eraseflash
21
Table 2-11: Getversion Command
21
Table 2-12: Getversion Response
21
Table 2-13: Eraseflash Command
21
Writeflashencrypted
22
Mode Transitions & Timings
22
Table 2-14: Writeflashencrypted Command
22
Table 2-15: Mode Transitions and Timings
22
Info Page
23
Eraseinfopage
23
Writeinfopage
23
Table 2-16: Eraseinfopage Command
23
Table 2-17: Writeinfopage Command
23
Readinfopage
24
Table 2-18: Readinfopage Command
24
Table 2-19: Readinfopage Response
24
Host-Controller Interface
25
Write Commands
25
Read Commands
25
Figure 3-1: Write Command Timing Diagram
25
Figure 3-2: Read Command Timing Diagram
25
Command Endianness
26
Figure 3-3: Getversion Write Capture
26
Figure 3-4: Getversion Read Capture
26
Status Registers
27
Getstatus
27
Stat1
27
Table 3-1: Getstatus Command
27
Table 3-2: Stat1 Values
27
Stat2
28
Table 3-3: Stat2 Values
28
Busy
29
Figure 3-5: BUSY Timing Diagram
29
Errors
30
Geterrors
30
Clearerrors
30
Table 3-4: Geterrors Command
30
Table 3-5: Geterrors Response
30
Table 3-6: Clearerrors Command
30
Memory Access
31
Writeregmem32
31
Readregmem32
31
Table 3-7: Writeregmem32 Command
31
Table 3-8: Readregmem32 Command
31
Table 3-9: Readregmem32 Response
31
Writeregmemmask32
32
Writebuffer8
32
Table 3-10: Writeregmemmask32 Command
32
Table 3-11: Writebuffer8 Command
32
Readbuffer8
33
Clearrxbuffer
33
Getrandomnumber
33
Table 3-12: Readbuffer8 Command
33
Table 3-13: Readbuffer8 Response
33
Table 3-14: Clearrxbuffer Command
33
Table 3-15: Getrandomnumber Command
33
Table 3-16: Getrandomnumber Response
33
Enablespicrc
34
Table 3-17: Enablespicrc Command
34
Gpios
35
Interrupts
35
Table 4-1: Digital I/Os
35
Table 4-2: Irqtoenable Interruption Mapping
36
Setdioirqparams
37
Clearirq
37
Table 4-3: Setdioirqparams Command
37
Table 4-4: Clearirq Command
37
RF Switch Control
38
Setdioasrfswitch
38
Table 4-5: Setdioasrfswitch Command
38
Drivediosinsleepmode
39
Table 4-6: Drivediosinsleepmode Command
39
Temperature Sensor
40
Gettemp
40
Table 4-7: Gettemp Command
40
Table 4-8: Gettemp Response
40
Power Distribution
41
Power Modes
41
Setregmode
41
Table 5-1: Setregmode Command
41
Table 5-2: Power Regulation Options
41
VBAT Measurement
42
Getvbat
42
Table 5-3: Getvbat Command
42
Table 5-4: Getvbat Response
42
Power-On-Reset and Brown-Out-Reset
43
Low Battery Detector
43
Over Current Protection
43
Figure 5-1: LR1121 por and BRN Functions
43
Clock Sources
44
RC Oscillators Clock References
44
High-Precision Clock References
44
Khz Crystal
44
32Mhz Crystal
44
32Mhz TCXO
45
Figure 6-1: LR1121 Thermal Insulation on PCB Top Layer
45
Figure 6-2: TCXO Circuit Diagram
45
Commands
46
Configlfclock
46
Table 6-1: Configlfclock Command
46
Settcxomode
47
Table 6-2: Settcxomode Command
47
Table 6-3: TCXO Supply Voltage Programming Values
47
Radio
48
Overview
48
Figure 7-1: Radio
48
Commands
49
Setrffrequency
49
Setrx
49
Table 7-1: Setrffrequency Command
49
Table 7-2: Setrx Command
49
Settx
50
Table 7-3: Settx Command
50
Autotxrx
51
Table 7-4: Autotxrx Command
51
Setrxtxfallbackmode
52
Table 7-5: Setrxtxfallbackmode Command
52
Setrxdutycycle
53
Table 7-6: Setrxdutycycle Command
53
Figure 7-2: LR1121 Current Profile During RX Duty Cycle Operation
54
Figure 7-3: RX Duty Cycle Upon Preamble Detection
54
Stoptimeoutonpreamble
55
Getrssiinst
55
Table 7-7: Stoptimeoutonpreamble Command
55
Table 7-8: Getrssiinst Command
55
Table 7-9: Getrssiinst Response
55
Getstats
56
Resetstats
56
Table 7-10: Getstats Command
56
Table 7-11: Getstats Response
56
Table 7-12: Resetstats Command
56
Getrxbufferstatus
57
Setrxboosted
57
Table 7-13: Getrxbufferstatus Command
57
Table 7-14: Getrxbufferstatus Response
57
Table 7-15: Setrxboosted Command
57
Setlorasyncword
58
Getlorarxheaderinfos
58
Table 7-16: Setlorasyncword Command
58
Table 7-17: Getlorarxheaderinfos Command
58
Table 7-18: Getlorarxheaderinfos Response
58
Setrssicalibration
59
Table 7-19: Setrssicalibration Command
59
Table 7-20: Gain Tune Values
59
Table 7-21: Recommended Values for Reference EVK
59
Modems
62
Modem Configuration
62
Figure 8-1: Lora /(G)FSK / LR-FHSS Command Order
62
Setpackettype
63
Getpackettype
63
Table 8-1: Setpackettype Command
63
Table 8-2: Getpackettype Command
63
Table 8-3: Getpackettype Response
63
Lora® Modem
64
Lora Modulation Principle
64
Figure 8-2: Lora Signal Bandwidth
64
Lora Packet Format
65
Figure 8-3: Lora Packet Format
65
Channel Activity Detection (CAD)
66
Lora® Commands
67
Setmodulationparams
67
Table 8-4: Setmodulationparams Command
67
Setpacketparams
68
Setcad
68
Table 8-5: Setpacketparams Command
68
Table 8-6: Setcad Command
68
Setcadparams
69
Setlorasynchtimeout
69
Table 8-7: Setcadparams Command
69
Table 8-8: Cadexitmode Parameter
69
Table 8-9: Setlorasynchtimeout Command
69
Setlorapublicnetwork
70
Getpacketstatus
70
Table 8-10: Setlorapublicnetwork Command
70
Table 8-11: Getpacketstatus Command
70
Table 8-12: Getpacketstatus Response
70
G)FSK Modem
71
G)FSK Modulation Principle
71
G)FSK Packet Engine
71
G)FSK Packet Format
72
Figure 8-4: Fixed-Length Packet
72
Figure 8-5: Variable-Length Packet
72
Sx128X Compatibility
73
G)FSK Commands
74
Setmodulationparams
74
Table 8-13: Setmodulationparams Command
74
Table 8-14: Bandwidth Parameter
74
Setpacketparams
75
Table 8-15: Setpacketparams Command
75
Setgfsksyncword
76
Setpacketadrs
76
Table 8-16: Setgfsksyncword Command
76
Table 8-17: Setpacketadrs Command
76
Setgfskcrcparams
77
Setgfskwhitparams
77
Table 8-18: Setgfskcrcparams Command
77
Table 8-19: Setgfskwhitparams Command
77
Getpacketstatus
78
Table 8-20: Getpacketstatus Command
78
Table 8-21: Getpacketstatus Response
78
LR-FHSS Modulation
79
LR-FHSS Modulation Principle
79
Figure 8-6: LR-FHSS Spectral Plot Example
79
LR-FHSS Commands
80
Setmodulationparams
80
Lrfhssbuildframe
80
Table 8-22: Setmodulationparams Command
80
Table 8-23: Lrfhssbuildframe Command
80
Table 8-24: Maximum User Payload Length, in Bytes
81
Lrfhsssetsyncword
82
Circuit Configuration for Long Range FHSS Transmission
82
Table 8-25: Lrfhsssetsyncword Command
82
Data Buffer
83
RSSI Functionality
83
Table 8-26: RSSI Information Origin and Meaning
83
Power Amplifiers
84
Figure 9-1: LR1121 Power Amplifiers
84
PA Supply Scheme
85
Figure 9-2: PA Block Diagram
85
Low Power PA
86
Figure 9-3: Low Power PA VR_PA Voltage Vs
86
High Power PA
87
Figure 9-4: High Power PA VR_PA Voltage Vs. Txpower
87
PA Output Power
88
Low Power PA
88
Figure 9-5: Low Power PA Output Power Vs. Txpower
88
High Power PA
89
Figure 9-6: HP PA Output Power Vs. Txpower
89
High Frequency PA
90
Figure 9-7: High Frequency PA Output Power Vs. Txpower
90
PA Current Consumption
91
Low Power PA
91
Figure 9-8: IDDTX Vs Txpower, Low Power PA, DC-DC Configuration
91
High Power PA
92
Figure 9-9: IDDTX Vs Txpower, Low Power PA, LDO Configuration
92
Figure 9-10: IDDTX Vs Txpower, High Power PA, DC-DC Configuration
93
Figure 9-11: IDDTX Vs Txpower, High Power PA, LDO Configuration
93
High Frequency PA
94
Figure 9-12: IDDTX Vs Txpower, High Frequency PA, DC-DC Configuration
94
Figure 9-13: IDDTX Vs Txpower, High Frequency PA, LDO Configuration
94
Impedance Matching Networks
95
Multi-Band Operation
95
Table 9-1: Optimized Settings for LP PA with the same Matching Network
95
Table 9-2: Optimized Settings for HP PA with the same Matching Network
95
Table 9-3: Optimized Settings for HF PA with the same Matching Network
95
RF Switch Implementation
97
Figure 9-14: RF Switch, Double PA Operation
97
Figure 9-15: RF Switch, Single PA Operation (High Power PA Example)
97
Direct-Tie Implementation
98
Figure 9-16: Single Tie Implementation: Only One PA Used (High Power PA Example)
98
Figure 9-17: Single Tie Implementation: both Pas Used (High Power PA Example)
98
Commands
99
Setpaconfig
99
Table 9-4: Setpaconfig Command
99
Table 9-5: Dutycycle Parameters
99
Settxparams
100
Table 9-6: Settxparams Command
100
Table 9-7: Ramptime Values
100
Cryptographic Engine
101
Description
101
Cryptographic Keys Definition
101
Table 10-1: Cryptographic Keys Usage and Derivation
101
Commands
103
Cestatus
103
Cryptosetkey
103
Table 10-2: Cryptosetkey Command
103
Table 10-3: Cryptosetkey Response
103
Cryptoderivekey
104
Table 10-4: Cryptoderivekey Command
104
Table 10-5: Cryptoderivekey Response
104
Cryptoprocessjoinaccept
105
Table 10-6: Cryptoprocessjoinaccept Command
105
Table 10-7: Cryptoprocessjoinaccept Response
105
Cryptocomputeaescmac
106
Table 10-8: Cryptocomputeaescmac Command
106
Table 10-9: Cryptocomputeaescmac Response
106
Table 10-10: Cryptocomputeaescmac Command Example
106
Table 10-11: Cryptocomputeaescmac Response Example
106
Cryptoverifyaescmac
107
Table 10-12: Cryptoverifyaescmac Command
107
Table 10-13: Cryptoverifyaescmac Response
107
Cryptoaesencrypt01
108
Table 10-14: Cryptoaesencrypt01 Command
108
Table 10-15: Cryptoaesencrypt01 Response
108
Cryptoaesencrypt
109
Table 10-16: Cryptoaesencrypt Command
109
Table 10-17: Cryptoaesencrypt Response
109
Cryptoaesdecrypt
110
Table 10-18: Cryptoaesdecrypt Command
110
Table 10-19: Cryptoaesdecrypt Response
110
Cryptostoretoflash
111
Cryptorestorefromflash
111
Table 10-20: Cryptostoretoflash Command
111
Table 10-21: Cryptoaesdecrypt Response
111
Table 10-22: Cryptorestorefromflash Command
111
Table 10-23: Cryptorestorefromflash Response
111
Cryptosetparam
112
Cryptogetparam
112
Table 10-24: Cryptosetparam Command
112
Table 10-25: Cryptosetparam Response
112
Table 10-26: Cryptogetparam Command
112
Table 10-27: Cryptogetparam Response
112
LR1121 Provisioning
113
Description
113
Provisioning Commands
113
Getchipeui
113
Table 11-1: Getchipeui Command
113
Table 11-2: Getchipeui Response
113
Getsemtechjoineui
114
Table 11-3: Getsemtechjoineui Command
114
Table 11-4: Getsemtechjoineui Response
114
Deriverootkeysandgetpin
115
Table 11-5: Deriverootkeysandgetpin Command (Standard)
115
Table 11-6: Deriverootkeysandgetpin Response
115
Table 11-7: Deriverootkeysandgetpin Command (Advanced)
116
Table 11-8: Deriverootkeysandgetpin Response (Advanced)
116
Crypto Engine Use with Lorawan V1.1.X
117
Figure 11-1: Key Derivation Scheme for Lorawan 1.1.X
117
Crypto Engine Use with Lorawan V1.0.X
118
Figure 11-2: Key Derivation Scheme for Lorawan 1.0.X
118
Table 11-9: Lorawan 1.0.X Vs. 1.1.X Security Correspondence Table
118
Test Commands
119
Regulatory Overview
119
Etsi
119
Fcc
119
Table 12-1: ETSI Test Signals
119
Commands
120
Settxcw
120
Settxinfinitepreamble
120
Table 12-2: Settxcw Command
120
Table 12-3: Settxinfinitepreamble Command
120
List of Commands
121
Register / Memory Access Operations
121
Table 13-1: Register / Memory Access Operations
121
System Configuration / Status Operations
122
Table 13-2: System Configuration / Status Operations
122
Radio Configuration / Status Operations
123
Table 13-3: Radio Configuration / Status Operations
123
Table 13-4: Cryptoelement Configuration / Status Operations
125
Table 13-5: Bootloader Commands
126
Table 14-1: Revision History
127

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