CMOSTEK CMT2300A - Packet Mode Operation

CMT2300A
Rev 1.0 | Page36/46
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6.2 Packet Mode
Packet
Handler
FIFO
data
clock
data
8
1
1
User Registers
EEPROM (CMT Parameters)
SPI
CSB
SCLK
SDIO
FCSB
INT1
INT2
MODEM
RF
Figure 6. Packet mode data path
The packet handler supportsthe classic and more flexible packet format in both TX and RX mode. It includes variable packet
format (Length in front of the Node ID), variable packet format (Length in the back of the Node ID) and fixed packet format. Each
element in the packet supports flexible configurations, as shown below.
Preamble Sync Word Length Node ID Data CRC
Payload/CRC
1 2 3 4 5 6
Manchester/Whiten/FEC(7,4)
Manchester
Data-Only CRC
图 20.Variable lengthpacket (Length in front of Node ID)
Preamble Sync Word
LengthNode ID
Data CRC
Payload/CRC
1 2 3 4 5 6
Manchester/Whiten/FEC(7,4)
Manchester
Data-Only CRC
图 21. Variable length packet (Length behind Node ID)