MC912D60ACPVE8 Datasheet, PDF (328/460 Pages) Freescale Semiconductor, Inc – MC68HC912D60A MC68HC912D60C MC68HC912D60P Technical Data

MSCAN Controller
RTR — Remote transmission request
This flag reflects the status of the Remote Transmission Request bit
in the CAN frame. In the case of a receive buffer it indicates the status
of the received frame and supports the transmission of an answering
frame in software. In the case of a transmit buffer this flag defines the
setting of the RTR bit to be sent.
0 = Data frame
1 = Remote frame
17.12.3 Data Length Register (DLR)
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 the transmission of a remote frame, the
data length code is transmitted as programmed while the number of
transmitted data bytes is always 0. The data byte count ranges from
0 to 8 for a data frame. Table 17-4 shows the effect of setting the DLC
bits.
Table 17-4. Data length codes
DLC3
0
0
0
0
0
0
0
0
1
Data length code
DLC2 DLC1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
DLC0
0
1
0
1
0
1
0
1
0
Data
byte
count
0
1
2
3
4
5
6
7
8
Technical Data
328
MSCAN Controller
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor