adf7023-j Analog Devices, Inc., adf7023-j Datasheet - Page 88

• Manufacturer Part Number: adf7023-j
• Description: High Performance, Low Power, Ism Band Fsk/gfsk/msk/gmsk Transceiver Ic
• Manufacturer: Analog Devices, Inc.

ADF7023-J
Table 88. 0x126: PACKET_LENGTH_CONTROL
Bit
[7]
[6]
[5]
[4:3]
[2:0]
Table 89. 0x127: PACKET_LENGTH_MAX
Bit
[7:0]
Name
DATA_BYTE
PACKET_LEN
CRC_EN
DATA_MODE
LENGTH_OFFSET
Name
PACKET_LENGTH_MAX
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Rev. 0 | Page 88 of 100
Description
Over-the-air arrangement of each transmitted packet RAM byte. A byte is
transmitted either MSB or LSB first. The same setting should be used on the
Tx and Rx sides of the link.
1: data byte MSB first.
0: data byte LSB first.
1: fixed packet length mode. Fixed packet length in Tx and Rx modes, given
by PACKET_LENGTH_MAX.
0: variable packet length mode. In Rx mode, packet length is given by the
first byte in packet RAM. In Tx mode, the packet length is given by
PACKET_LENGTH_MAX.
1: append CRC in transmit mode. Check CRC in receive mode.
0: no CRC addition in transmit mode. No CRC check in receive mode.
Sets the ADF7023-J to packet mode or sport mode for transmit and receive data.
DATA_MODE
0
1
2
3
Offset value in bytes that is added to the received packet length field value
(in variable length packet mode) so that the communications processor
knows the correct number of bytes to read. The communications processor
calculates the actual received payload length as Rx Payload Length = Length
+ LENGTH_OFFSET – 4, where Length is the length field (the first byte in the
received payload).
Description
If variable packet length mode is used (PACKET_LENGTH_CONTROL = 0),
PACKET_LENGTH_MAX sets the maximum receive packet length in bytes.
If fixed packet length mode is used (PACKET_LENGTH_CONTROL = 1),
PACKET_LENGTH_MAX sets the length of the fixed transmit and receive
packet in bytes. Note that the packet length is defined as the number of
bytes from the end of the sync word to the start of the CRC. It also does not
include the LENGTH_OFFSET value.
Description
Packet mode enabled.
Sport mode enabled. GP4 interrupt enabled on preamble
detection. Rx data enabled on preamble detection.
Sport mode enabled. GP4 interrupt enabled on sync word
detection. Rx data enabled on preamble detection.
Unused.