MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 421

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

24.13.5 Transmit Buffer Priority Registers
24.14 Programmer’s Model of Control Registers
68HC908AZ32A — Rev 0.0
MOTOROLA
Address:
PRIO7–PRIO0 — Local Priority
The programmer’s model has been laid out for maximum simplicity and
efficiency.
of the MSCAN08.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
This field defines the local priority of the associated message buffer.
The local priority is used for the internal prioritisation process of the
MSCAN08 and is defined to be highest for the smallest binary
number. The MSCAN08 implements the following internal
prioritisation mechanism:
•
•
•
For More Information On This Product,
Figure 24-13. Transmit Buffer Priority Register (TBPR)
All transmission buffers with a cleared TXE flag participate in the
prioritisation right before the SOF is sent.
The transmission buffer with the lowest local priority field wins the
prioritisation.
In case more than one buffer has the same lowest priority, the
message buffer with the lower index number wins.
PRIO7
$05bD
Bit 7
u
Figure 24-14
MSCAN Controller (MSCAN08)
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PRIO6
6
u
PRIO5
gives an overview on the control register block
5
u
PRIO4
4
u
Programmer’s Model of Control Registers
PRIO3
3
u
MSCAN Controller (MSCAN08)
PRIO2
2
u
Advance Information
PRIO1
1
u
PRIO0
Bit 0
u
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