100BASE-T1 SPY 12 Port
User Manual
40
Figure 4-4: Structure of 100BASE-T1_SPY_12_Port Raw Frame with CAN Payload
Note:
The Control Field byte contains the following information about the CAN
reception state:
7
6
5
4
3
2
1
0
Reserved
ESI
BRS
EDL
IDE
RTR
CRC
ACK
Table 4-6: CAN reception state byte
•
ACK
: A ‘1’ value in this bit
indicates if there was an acknowledge during the
reception of the CAN frame.
•
CRC:
A ‘1’ value in this bit indicates if there was any CAN CRC error during the
reception of the CAN frame
•
RTR:
A ‘1’ value in this bit indicates if the CAN frame is a remote fra
me. In this
case, the LENGTH field will be 0x00, and there is no any payload.
•
IDE:
A ‘1’ value in this bit indicates if the CAN frame ID is in standard (11 bits)
or extended format (29 bits).
•
EDL
: A ‘1’ value in this bit indicates if the received CAN frame
is CAN-FD.
•
BRS:
A ‘1’ value in this bit indicates if there was a Bit Rate Switch on the
original CAN-FD frame.
•
ESI:
A ‘1’ value in this bit gives information about the ESI bit in CAN
-FD
protocol.
Note:
The Zero Padding length depends on the Length Field. There will be Zero
Padding if CAN Payload length is less than the minimum RAW Ethernet Payload size
(46 bytes). There is zero padding if CAN Length is less than 48 bytes.
