Datasheet

MSCAN Controller
Technical Data MC68HC912DT128A — Rev 4.0
330 MSCAN Controller MOTOROLA
Figure 18-2. User Model for Message Buffer Organization
18.4.3 Transmit Structures
The msCAN12 has a triple transmit buffer scheme in order to allow
multiple messages to be set up in advance and to achieve an optimized
real-time performance. The three buffers are arranged as shown in
Figure 18-2.
All three buffers have a 13 byte data structure similar to the outline of the
receive buffers (see Programmer’s Model of Message Storage). An
additional transmit buffer priority register (TBPR) contains an 8-bit so
RxFG
RxBG
Tx0
RXF
TXE
PRIO
Tx1
TXE
PRIO
Tx2
TXE
PRIO
msCAN12 CPU bus
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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