SM1211E915 Semtech, SM1211E915 Datasheet - Page 47

• Manufacturer Part Number: SM1211E915
• Description: Dev Kit Accessory
• Manufacturer: Semtech

Specifications of SM1211E915

• Modulation Type: FSK, OOK
• Data Rate Max: 200Kbps
• Frequency Range: 902MHz To 928MHz
• Supply Voltage Range: 2.1V To 3.6V
• Module Interface: SPI
• Supply Current: 25mA
• Accessory Type: RF Module
• Sensitivity: -105dBm
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TQFN EP
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Sensitivity (dbm): -105dBm
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

Note that depending upon the application, some uC connections may not be needed:
In addition, DATA pin (unused in buffered mode) should be pulled-up to VDD through a 100 k resistor.
Please refer to Table 13 for the SX1211’s pin configuration.
Table 22: Relevant Configuration Registers in Buffered Mode (data processing related only)
Tx Mode:
Rev 7 – Sept 2
ADVANCED COMMUNICATIONS & SENSING
SYNCParam
IRQParam
MCParam
RXParam
IRQ_0: if none of the relevant IRQ sources are used. In this case, leave floating.
IRQ_1: if none of the relevant IRQ sources are used. In this case, leave floating.
MISO: if no read register access is needed and the chip is used in Tx mode only. In this case, pull up to VDD
through a 100 k resistor.
Configure all data processing related registers listed below appropriately. In this example we assume Sync
word recognition is on and Fifo_fill_method=0.
Program Tx start condition and IRQs: Start Tx when FIFO is not empty (Tx_start_irq_0=1) and IRQ_1 mapped
to Tx_done (Tx_irq_1=1)
Go to Tx mode (and wait for Tx to be ready, see Figure 50)
5.4.5. uC Connections
5.4.6. Buffered Mode Example
nd
, 2008
Fifo_fill_method
Rx_stby_irq_0
Rx_stby_irq_1
Tx_start_irq_0
Data_mode_x
Sync_value
Fifo_thresh
Sync_size
Fifo_size
Tx_irq_1
Sync_tol
Fifo_fill
Figure 41: uC Connections in Buffered Mode
SX1211
NSS_CONFIG
NSS_DATA
Tx
X
X
X
X
X
IRQ_0
IRQ_1
MOSI
MISO
SCK
Rx
X
X
X
X
X
X
X
X
X
X
Page 47 of 92
Defines data operation mode ( Buffered)
Defines FIFO size
Defines FIFO threshold
Defines IRQ_0 source in Rx & Stby modes
Defines IRQ_1 source in Rx & Stby modes
Defines IRQ_1 source in Tx mode
Defines FIFO filling method
Controls FIFO filling status
Defines Tx start condition and IRQ_0 source
Defines Sync word size
Defines the error tolerance on Sync word detection
Defines Sync word value
uC
Description
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SX1211