Rev1.0 | 40/50
CMT2300A
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 supports the 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
Figure 20. Variable length packet (Length in front of Node ID)
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
Figure 21. Variable length packet (Length behind Node ID)