Rainbow Electronics CAN интерфейс - Manual (Page 14)

BOSCH
ROBERT BOSCH GmbH, Postfach 50, D-7000 Stuttgart 1
Sep. 1991
Part A - page 12
Coding of the number of data bytes by the DATA LENGTH CODE
abbreviations: d ’dominant’
r ’recessive’
DATA FRAME: admissible numbers of data bytes: {0,1,....,7,8}.
Other values may not be used.
r1 r0 DLC3 DLC2 DLC1 DLC0
or
CRC
Field
Arbitration
Field Data
Field CONTROL FIELD
Data Length Code reserved
bits
0
1
2
3
4
5
6
7
8
d
d
d
d
d
d
d
d
r
d
d
d
d
r
r
r
r
d
d
d
r
r
d
d
r
r
d
d
r
d
r
d
r
d
r
d
DLC3 DLC2 DLC1 DLC0
Number of Data
Bytes
Data Length Code
Data Frame