Freescale’s Scalable Controller Area Network (S12MSCANV3)
8.4.2
Message Storage
CAN Receive / Transmit Engine
Memory Mapped I/O
Rx0
Rx1
Rx2
Rx3
Rx4
MSCAN
RXF
CPU bus
Receiver
TXE0
Tx0
PRIO
TXE1
Tx1
CPU bus
MSCAN
PRIO
TXE2
Tx2
PRIO
Transmitter
Figure 8-39. User Model for Message Buffer Organization
The MSCAN facilitates a sophisticated message storage system which addresses the requirements of a
broad range of network applications.
8.4.2.1
Message Transmit Background
Modern application layer software is built upon two fundamental assumptions:
S12P-Family Reference Manual, Rev. 1.13
286
Freescale Semiconductor
FREESCALE [ Freescale ]
