MAC7200 datasheet(705/976 Pages) FREESCALE

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eSCI Features

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

627

31.2

eSCI Features

The SCI modules will often be used on the MAC72xx as LIN Masters, with the main functionality being

polling of several nodes on a LIN bus. There is currently no requirement for IrDA on the MAC72xx. The

eSCI has the following features:

•

Memory Map: 32-bit peripheral with 8 bytes, byte/halfword/word addressable

•

Standard Non return-to-Zero (NRZ) Mark/Space Format.

•

Full-Duplex Operation.

•

Software Selectable Word Length (8-bit or 9-bit words).

•

10/11 or 13/14 bit Break Character possible.

•

13-Bit Programmable Baud-Rate Modulus Counter.

•

Separately Enabled Transmitter and Receiver.

•

Separate receiver and transmitter CPU interrupt requests.

•

Programmable transmitter output polarity.

•

Two receiver wake up methods:

— Idle line walk-up

— Address mark walk-up

•

Interrupt-driven operation with eight flags:

— Transmitter empty

— Transmission complete

— Receiver full

— Idle receiver input

— Receiver overrun

— Noise error

— Framing error

— Parity error

•

Receiver framing error detection.

•

Hardware Parity Checking.

•

1/16 bit time noise reduction.

•

LIN Master mode state machine

— Supports generation of LIN message header.

— Detection and flagging of LIN errors.

•

Two DMA request lines on each peripheral for receive and transmit data.

31.2.1

LIN support

The eSCI provides the following LIN features:

•

LIN Master Node functionality (master and slave task)

•

Compatible with LIN slaves from revisions 1.x and 2.0 of the LIN standard

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