AN2283 Freescale Semiconductor / Motorola, AN2283 Datasheet - Page 6

• Manufacturer Part Number: AN2283
• Description: Scalable Controller Area Network (MSCAN)
• Manufacturer: Freescale Semiconductor / Motorola

AN2283/D
Data Length
Register
Data Segment
Registers
Transmit Buffer
Priority Register
6
Motorola Scalable Controller Area Network (MSCAN) Interrupts
RTR — Remote Transmission Request
The Data Length Register contains information on the number of data bytes in
the CAN message. The data byte count ranges from 0–8 for the data frame
(see
The eight Data Segment Registers contain the data bytes to be transmitted.
The number of bytes being transmitted is determined by the data length code
in the data length register (see
PRIO7
This flag defines the type of message frame that will be transmitted onto the
CAN bus and whether or not that frame contains data. In the case of a
transmit buffer, this flag defines the setting of the RTR bit to be sent.
Freescale Semiconductor, Inc.
Bit 7
Table
For More Information On This Product,
1 = Remote frame
0 = Data frame
DLC3
3).
0
0
0
0
0
0
0
0
1
PRIO6
Figure 5. Transmit Buffer Priority Register (TBPR)
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6
Table 3. Data Length Code and Byte Count
PRIO5
DLC2
Data Length Code
5
0
0
0
0
1
1
1
1
0
Table
PRIO4
4
DLC1
3).
0
0
1
1
0
0
1
1
0
PRIO3
3
DLC0
PRIO2
0
1
0
1
0
1
0
1
0
2
PRIO1
Data Byte
Count
1
0
1
2
3
4
5
6
7
8
MOTOROLA
PRIO0
Bit 0