Datasheet
Table Of Contents
- 1. General Description
- 2. Electrical Characteristics
- 3. SX1272/73 Features
- 4. SX1272/73 Digital Electronics
- 4.1. The LoRaTM Modem
- 4.2. FSK/OOK Modem
- 4.2.1. Bit Rate Setting
- 4.2.2. FSK/OOK Transmission
- 4.2.3. FSK/OOK Reception
- 4.2.4. Operating Modes in FSK/OOK Mode
- 4.2.5. General Overview
- 4.2.6. Startup Times
- 4.2.7. Receiver Startup Options
- 4.2.8. Receiver Restart Methods
- 4.2.9. Top Level Sequencer
- 4.2.10. Data Processing in FSK/OOK Mode
- 4.2.11. FIFO
- 4.2.12. Digital IO Pins Mapping
- 4.2.13. Continuous Mode
- 4.2.14. Packet Mode
- 4.2.15. io-homecontrol® Compatibility Mode
- 4.3. SPI Interface
- 5. SX1272/73 Analog & RF Frontend Electronics
- 6. Description of the Registers
- 7. Application Information
- 8. Packaging Information
- 9. Revision History

www.semtech.comPage 20
SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
2.5.6. Digital Specification
Conditions: Temp = 25° C, VDD = 3.3 V, FXOSC = 32 MHz, unless otherwise specified.
Table 11 Digital Specification
Symbol Description Conditions Min Typ Max Unit
V
IH
Digital input level high 0.8 - - VDD
V
IL
Digital input level low - - 0.2 VDD
V
OH
Digital output level high Imax = 1 mA 0.9 - - VDD
V
OL
Digital output level low Imax = -1 mA - - 0.1 VDD
F
SCK
SCK frequency - - 10 MHz
t
ch
SCK high time 50 - - ns
t
cl
SCK low time 50 - - ns
t
rise
SCK rise time - 5 - ns
t
fall
SCK fall time - 5 - ns
t
setup
MOSI setup time From MOSI change to SCK rising edge 30 - - ns
t
hold
MOSI hold time From SCK rising edge to MOSI change 20 - - ns
t
nsetup
NSS setup time From NSS falling edge to SCK rising
edge
30 - - ns
t
nhold
NSS hold time From SCK falling edge to NSS rising
edge, normal mode
100 - - ns
t
nhigh
NSS high time between SPI
accesses
20 - - ns
T_DATA DATA hold and setup time 250 - - ns