SX1212IWLTRT Semtech, SX1212IWLTRT Datasheet - Page 49

IC TXRX 300MHZ-510MHZ 32-TQFN

SX1212IWLTRT

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

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

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Similar to Buffered mode operation, in Packet mode the NRZ data to (from) the (de)modulator is not directly
accessed by the uC but stored in the FIFO and accessed via the SPI Data interface.
In addition, the SX1212’s packet handler performs several packet oriented tasks such as Preamble and Sync word
generation, CRC calculation/check, whitening/dewhitening of data, address filtering, etc. This simplifies still further
software and reduces uC overhead by performing these repetitive tasks within the RF chip itself.
Another important feature is ability to fill and empty the FIFO in Stby mode, ensuring optimum power consumption
and adding more flexibility for the software.
Note that Bit Synchronizer and Sync word recognition are automatically enabled in Packet mode.
Two types of packet formats are supported: fixed length and variable length, selectable by the
PKTParam_Pkt_format bit. The maximum size of the payload is limited by the size of the FIFO selected (16, 32, 48
or 64 bytes).
In applications where the packet length is fixed in advance, this mode of operation may be of interest to minimize
RF overhead (no length byte field is required). All nodes, whether Tx only, Rx only, or Tx/Rx should be
programmed with the same packet length value.
The length of the payload is set by the PKTParam_Payload_length register and is limited by the size of the FIFO
selected.
Rev 2 – June 18th, 2009
ADVANCED COMMUNICATIONS & SENSING
Data
5.5. Packet Mode
Datapath
5.5.1. General Description
5.5.2. Packet Format
Tx
Rx
5.5.2.1. Fixed Length Packet Format
RECOG.
SYNC
HANDLER
PACKET
Figure 42: Packet Mode Conceptual View
SX1212
CONTROL
Page 49 of 77
(+SR)
FIFO
CONFIG
DATA
SPI
www.semtech.com
NSS_CONFIG
MISO
SCK
MOSI
NSS_DATA
IRQ_1
IRQ_0
SX1212

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