Техническая Спецификация для Freescale Semiconductor Tower System Eval Kit for MC9S12GN32 TWR-S12GN32-KIT TWR-S12GN32-KIT

Модели

TWR-S12GN32-KIT

Freescale’s Scalable Controller Area Network (S12MSCANV3)

MC9S12G Family Reference Manual, Rev.1.23

Freescale Semiconductor

619

18.4.2

Message Storage

Figure 18-39. 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.

18.4.2.1

Message Transmit Background

Modern application layer software is built upon two fundamental assumptions:

MSCAN

Rx0

Rx1

CAN Receive / Transmit Engine

Memory Mapped I/O

CPU bus

MSCAN

Tx2

TXE2

PRIO

Receiver

Transmitter

RxBG

TxBG

Tx0

TXE0

PRIO

TxBG

Tx1

PRIO

TXE1

TxFG

CPU bus

Rx2

Rx3

Rx4

RXF

RxFG