SX1212IWLTRT Semtech, SX1212IWLTRT Datasheet - Page 43

• Manufacturer Part Number: SX1212IWLTRT
• Description: IC TXRX 300MHZ-510MHZ 32-TQFN
• Manufacturer: Semtech

Specifications of SX1212IWLTRT

• Frequency: 300MHz ~ 510MHz
• Data Rate - Maximum: 150kbps
• Modulation Or Protocol: FSK, OOK
• Applications: AMR, ISM, Home Automation, Process Control
• Power - Output: 12.5dBm
• Sensitivity: -110dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 3mA
• Current - Transmitting: 25mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFN
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Modulation Type: FSK/OOK
• Package Type: TQFN EP
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: SX1212IWLTR

Note that some connections may not be needed depending on the application:
In addition, NSS_DATA pin (unused in continuous mode) should be pulled-up to VDD through a 100 kΩ resistor.
Please refer to Table 13 for SX1212’s pins configuration
Table 19: Relevant Configuration Registers in Continuous Mode (data processing related only)
Tx Mode:
Rx Mode:
Rev 2 – June 18th, 2009
ADVANCED COMMUNICATIONS & SENSING
SYNCParam
IRQParam
MCParam
RXParam
IRQ_0: if Sync and RSSI interrupts are not used. In this case, leave floating.
IRQ_1: if the chip is never used in Tx FSK mode (DCLK connection is not compulsory in Rx and Tx OOK
modes). In this case, leave floating.
MISO: if no read register access is needed. In this case, pull-up to VDD through a 100 kΩ resistor.
Configure all data processing related registers listed below appropriately. In this example we assume that both
Bit synchronizer and Sync word recognition are on.
Go to Tx mode (and wait for Tx to be ready, see Figure 50)
Send all packet’s bits on DATA pin synchronously with DCLK signal provided on IRQ_1
Go to Sleep mode
Program Rx interrupts: IRQ_0 mapped to Sync (Rx_stby_irq_0=”00”) and IRQ_1 mapped to DCLK (Bit
synchronizer enabled)
Go to Rx mode (note that Rx is not ready immediately, see Figure 49)
Wait for Sync interrupt
Get all packet bits on DATA pin synchronously with DCLK signal provided on IRQ_1
Go to Sleep mode
5.3.5. uC Connections
5.3.6. Continuous Mode Example
Rx_stby_irq_0
Data_mode_x
Sync_value
Sync_size
Sync_on
Sync_tol
Figure 37: uC Connections in Continuous Mode
SX1212
Tx
X
IRQ_1 (DCLK)
NSS_CONFIG
IRQ_0
DATA
MOSI
MISO
SCK
Rx
X
X
X
X
X
X
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Description
Defines data operation mode (
Defines IRQ_0 source in Rx mode
Enables Sync word recognition
Defines Sync word size
Defines the error tolerance on Sync word recognition
Defines Sync word value
uC
Continuous)
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SX1212