Lantronix DSTni-EX - Manual (Page 77)

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Table 5-26. RxMessage: RTR
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OFFSET 3C
FIELD /// AFI_2 AFI_1 AFI_0 /// RTR IDE DLC_3 DLC_2 DLC_1 DLC_0
RESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Table 5-27. Rx Message: RTR Register Definitions
Bits Field Name Description
15:11 /// Reserved
10:8 AFI[2:0] Acceptance Filter Indicator
Indicates which acceptance filter(s) accepted the incoming message. If
more than one filter accepted the message, more than one bit is set.
7:6 /// Reserved
5 RTR Remote Bit
4 IDE Extended Identifier Bit
3 DLC[3:0] Data Length Code
Invalid values are transmitted as they are.
Table 5-28. Rx Message: Msg Flags
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OFFSET 3E
FIELD ///
Rx_Fifo2 Rx-Fifo1 Rx_Fifo0
///
Msg Aval
RESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W R/W R/W R/W R/W R/W R/W R/W R/W R R R R/W R/W R/W R/W R/W
Table 5-29. Rx Message: Msg Flags Register Definitions
Bits Field Name Description
15:8 /// Reserved
7:5 Rx_Fifo[2:0]: Rx FIFO Status
These two Read Only flags indicate how many messages are
waiting in the queue.
000 = empty
001 = 1/4 full
010 = 1/2 full
011 = 3/4 full
100 = full
Other values are not applicable.
4:1 /// Reserved
0 Msg Avail Message Available
MsgAval goes HIGH when a new message is available. Writing a ‘ 1’ clears
this flag and indicates that the message has been read. If another message
is available, this flag is not cleared and the new message from RxMsg1
buffer is accessible.