MC9S08DZ96F2CLL datasheet(256/458 Pages) FREESCALE

tên linh kiện	MC9S08DZ96F2CLL

Giải thích chi tiết về linh kiện	Microcontrollers

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Chapter 12 Freescale’s Controller Area Network (S08MSCANV1)

MC9S08DZ128 Series Data Sheet, Rev. 1

256

Freescale Semiconductor

12.1.3

Block Diagram

Figure 12-2. MSCAN Block Diagram

12.2

External Signal Description

The MSCAN uses two external pins:

12.2.1

RXCAN — CAN Receiver Input Pin

RXCAN is the MSCAN receiver input pin.

12.2.2

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

12.2.3

CAN System

A typical CAN system with MSCAN is shown in Figure 12-3. Each CAN node 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 nodes.

RXCAN

TXCAN

Receive/

Transmit

Engine

Message

Filtering

and

Buffering

Control

and

Status

Wake-Up Interrupt Req.

Errors Interrupt Req.

Receive Interrupt Req.

Transmit Interrupt Req.

CANCLK

Bus Clock

Conﬁguration

Oscillator Clock

MUX

Presc.

Tq Clk

MSCAN

Low Pass Filter

Wake-Up

Registers

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