MC68HC08AZ60 Datasheet, PDF (333/452 Pages) Motorola, Inc – Advance Information

Data Length
Register (DLR)
Freescale Semiconductor, Inc.
MSCAN Controller (MSCAN08)
Programmer’s Model of Message Storage
This register keeps the data length field of the CAN frame.
DLC3–DLC0 — Data Length Code Bits
The data length code contains the number of bytes (data byte count)
of the respective message. At transmission of a remote frame, the
data length code is transmitted as programmed while the number of
transmitted bytes is always 0. The data byte count ranges from 0 to 8
for a data frame. Table 5 shows the effect of setting the DLC bits.
Table 5. Data Length Codes
Data Length Code
Data
Byte
DLC3 DLC2 DLC1 DLC0 Count
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
0
0
8
Data Segment
Registers (DSRn)
The eight data segment registers contain the data to be transmitted or
received. The number of bytes to be transmitted or being received is
determined by the data length code in the corresponding DLR.
29-mscan
MOTOROLA
MC68HC08AZ60 — Rev 1.0
MSCAN Controller (MSCAN08)
333
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