SM1211E915TOPIC Semtech, SM1211E915TOPIC Datasheet - Page 50
SM1211E915TOPIC
Manufacturer Part Number
SM1211E915TOPIC
Description
KIT PICTAIL EXT FOR SX1211
Manufacturer
Semtech
Type
Transceiver, UHFr
Specifications of SM1211E915TOPIC
Frequency
915MHz
For Use With/related Products
SX1211
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 50 of 92
- Download datasheet (2Mb)
The length stored in this register relates only to the payload which includes the message and the optional address
byte. In this mode, the payload must contain at least one byte, i.e. address or message byte.
An illustration of a fixed length packet is shown in Figure 43. It contains the following fields:
This mode is necessary in applications where the length of the packet is not known in advance and can vary over
time. It is then necessary for the transmitter to send the length information together with each packet in order for
the receiver to operate properly.
In this mode the length of the payload, indicated by the length byte in Figure 44, is given by the first byte of the
FIFO and is limited only by the width of the FIFO selected. Note that the length byte itself is not included in its
calculation. In this mode, the payload must contain at least 2 bytes, i.e. length + address or message byte.
An illustration of a variable length packet is shown in Figure 44. It contains the following fields:
Rev 7 – Sept 2
ADVANCED COMMUNICATIONS & SENSING
Preamble (1010...).
Sync word (Network ID).
Optional Address byte (Node ID).
Message data.
Optional 2-bytes CRC checksum.
Preamble (1010...).
Sync word (Network ID).
Length byte
Optional Address byte (Node ID).
Message data.
Optional 2-bytes CRC checksum.
nd
, 2008
5.5.2.2. Variable Length Packet Format
1 to 4 bytes
Preamble
Optional User provided fields which are part of the payload
Message part of the payload
Fields added by the packet handler in Tx and processed and removed in Rx
1 to 4 bytes
Sync Word
Figure 43: Fixed Length Packet Format
Address
byte
Page 50 of 92
CRC checksum calculation
Optional DC free data coding
Payload/FIFO
0 to (FIFO size) bytes
Message
2-bytes
CRC
www.semtech.com
SX1211
Related parts for SM1211E915TOPIC
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Ultra Low Power Integrated Uhf Transceiver Module
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
EVALUATION BOARD
Manufacturer:
Semtech
Datasheet:
Part Number:
Description:
EVALUATION BOARD
Manufacturer:
Semtech
Datasheet:
Part Number:
Description:
VOLTAGE SUPPRESSOR, TRANSIENT SEMTECH
Manufacturer:
Semtech
Datasheet:
Part Number:
Description:
HIGH VOLTAGE CAPACITORS MONOLITHIC CERAMIC TYPE
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
EZ1084CM5.0 AMP POSITIVE VOLTAGE REGULATOR
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
3.0 AMP LOW DROPOUT POSITIVE VOLTAGE REGULATORS
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
RailClamp Low Capacitance TVS Diode Array
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet: