XR18W753
24
SINGLE CHIP 868MHZ TO 956MHZ RF TRANSCEIVER REV. 1.0.0
DATA RATES
FREQUENCY BAND SYMBOL RATE BIT RATE CHIP RATE -3dB BANDWIDTH NOTE
European SRD 25 Ksps 100 Kbps 400 Kcps 200 KHz 16-ary symbols
16 chips per symbol
4 bits per symbol
2 symbols per byte
North American / Australian ISM 62.5 Ksps 250 Kbps 1 Mcps 500 KHz
950 MHZ 62.5 Ksps 250 Kbps 1 Mcps 500 KHz
PACKET STRUCTURE
Europe SRD Band
Preamble (all zero-symbols) 4 Bytes
Start Frame Delimiter (SFD = 0xA7) 1 Bytes
Frame Length (PHR) 1 Bytes
Payload Data 0 - 127 Bytes
Frame Check Sum (FCS) 2 Bytes
North American / Australian ISM Band
Preamble (all zero-symbols) 10 Bytes
Start Frame Delimiter (SFD = 0xA7) 1 Bytes
Frame Length (PHR) 1 Bytes
Payload Data 0 - 127 Bytes
Frame Check Sum (FCS) 2 Bytes
950 MHZ Band
Preamble (all zero-symbols) 10 Bytes
Start Frame Delimiter (SFD = 0xA7) 1 Bytes
Frame Length (PHR) 1 Bytes
Payload Data 0 - 127 Bytes
Frame Check Sum (FCS) 2 Bytes
