mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 336

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MSCAN Controller
17.12.3 Data Length Register (DLR)
Technical Data
336
RTR — Remote transmission request
This register keeps the data length field of the CAN frame.
DLC3 – DLC0 — Data length code bits
Freescale Semiconductor, Inc.
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.
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.
bits.
For More Information On This Product,
0 = Data frame
1 = Remote frame
Go to: www.freescale.com
MSCAN Controller
DLC3
0
0
0
0
0
0
0
0
1
Table 17-3. Data length codes
Data length code
Table 17-3
DLC2
0
0
0
0
1
1
1
1
0
DLC1
0
0
1
1
0
0
1
1
0
shows the effect of setting the DLC
DLC0
0
1
0
1
0
1
0
1
0
MC68HC912DG128 — Rev 3.0
count
Data
byte
0
1
2
3
4
5
6
7
8
MOTOROLA