mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 334

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

MSCAN Controller (MSCAN08)
Transmit Buffer
Priority Registers
Programmer’s Model of Control Registers
MC68HC08AZ60 — Rev 1.0
334
Address:
PRIO7–PRIO0 — Local Priority
The programmer’s model has been laid out for maximum simplicity and
efficiency.
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 priorization process of the
MSCAN08 and is defined to be highest for the smallest binary
number. The MSCAN08 implements the following internal priorization
mechanism:
•
•
•
For More Information On This Product,
All transmission buffers with a cleared TXE flag participate in the
priorization right before the SOF is sent.
The transmission buffer with the lowest local priority field wins the
priorization.
In case more than one buffer has the same lowest priority, the
message buffer with the lower index number wins.
Figure 13. Transmit Buffer Priority Register (TBPR)
$05bD
PRIO7
Bit 7
u
Figure 14
MSCAN Controller (MSCAN08)
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PRIO6
6
u
gives an overview on the control register block of
PRIO5
5
u
PRIO4
4
u
PRIO3
3
u
PRIO2
2
u
PRIO1
1
u
MOTOROLA
30-mscan
PRIO0
Bit 0
u