PC912XDP512F0MPVR datasheet(421/1348 Pages) FREESCALE

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Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

421

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Internal timer for time-stamping of received and transmitted messages

•

Three low-power modes: sleep, power down, and MSCAN enable

•

Global initialization of conﬁguration registers

10.1.4

Modes of Operation

The following modes of operation are speciﬁc to the MSCAN. See Section 10.4, “Functional Description,”

for details.

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Listen-Only Mode

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MSCAN Sleep Mode

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MSCAN Initialization Mode

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MSCAN Power Down Mode

10.2

External Signal Description

The MSCAN uses two external pins:

10.2.1

RXCAN — CAN Receiver Input Pin

RXCAN is the MSCAN receiver input pin.

10.2.2

TXCAN — CAN Transmitter Output Pin

TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the

CAN bus:

0 = Dominant state

1 = Recessive state

10.2.3

CAN System

A typical CAN system with MSCAN is shown in Figure 10-2. Each CAN station is connected physically

to the CAN bus lines through a transceiver device. The transceiver is capable of driving the large current

needed for the CAN bus and has current protection against defective CAN or defective stations.

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