Rainbow Electronics CAN интерфейс - Manual (Page 51)

BOSCH
ROBERT BOSCH GmbH, Postfach 300240, D-7000 Stuttgart 30
Sep. 1991
Part B - page 49
END OF FRAME ( Standard Format as well as Extended Format )
Each DATA FRAME and REMOTE FRAME is delimited by a flag sequence consisting
of seven ’recessive’ bits.
3.2.2 REMOTE FRAME
A station acting as a RECEIVER for certain data can initiate the transmission of the
respective data by its source node by sending a REMOTE FRAME.
A REMOTE FRAME exists in both Standard Format and Extended Format. In both
cases it is composed of six different bit fields:
START OF FRAME, ARBITRATION FIELD, CONTROL FIELD, CRC FIELD, ACK
FIELD, END OF FRAME.
Contrary to DATA FRAMEs, the RTR bit of REMOTE FRAMEs is ’recessive’. There is
no DATA FIELD, independent of the values of the DATA LENGTH CODE which may
be signed any value within the admissible range 0...8. The value is the DATA LENGTH
CODE of the corresponding DATA FRAME.
Inter
Space
Inter
Space
Start of Frame
Arbitration Field
Control Field
CRC Field
ACK Field
End of Frame
or
Overload
Frame
REMOTE FRAME
Frame Frame
Remote Frame