MAC7200 datasheet(31/976 Pages) FREESCALE

31 / 976 page

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

xxxi

30.12.6

Continuous Serial Communications Clock..................................................................614

30.12.7

Interrupts/DMA Requests ............................................................................................615

30.12.7.1

End of Queue Interrupt Request ..............................................................................615

30.12.7.2

Transmit FIFO Fill Interrupt or DMA Request .......................................................616

30.12.7.3

Transfer Complete Interrupt Request ......................................................................616

30.12.7.4

Transmit FIFO Underflow Interrupt Request ..........................................................616

30.12.7.5

Receive FIFO Drain Interrupt or DMA Request .....................................................616

30.12.7.6

Receive FIFO Overflow Interrupt Request..............................................................616

30.12.8

Power Saving Features.................................................................................................616

30.12.8.1

External Stop Mode .................................................................................................617

30.12.8.2

Module Disable Mode .............................................................................................617

30.12.8.3

Signal Gating ...........................................................................................................618

30.13

Initialization/Application Information .............................................................................618

30.13.1

How to Change Queues ...............................................................................................618

30.13.2

Baud Rate Settings.......................................................................................................619

30.13.3

Delay Settings ..............................................................................................................619

30.13.4

Oak Family Compatibility with the DSPI ...................................................................620

30.13.5

Calculation of FIFO Pointer Addresses .......................................................................621

30.13.5.1

Address Calculation for the First-in Entry and Last-in Entry in the TX FIFO........622

30.13.5.2

Address Calculation for the First-in Entry and Last-in Entry in the RX FIFO .......622

Chapter 31

Enhanced Serial Communications Interface (eSCI)

31.1

Introduction to the eSCI on MAC7200............................................................................625

31.1.1

Block Diagram.............................................................................................................626

31.2

eSCI Features ...................................................................................................................627

31.2.1

LIN support..................................................................................................................627

31.2.2

Modes of Operation .....................................................................................................628

31.3

eSCI Protocol ...................................................................................................................628

31.3.1

LIN Protocol Summary................................................................................................628

31.4

eSCI Implementation .......................................................................................................630

31.5

eSCI External Pins ...........................................................................................................630

31.5.1

SCI Transmit Pin (TXD_A, TXD_B) ..........................................................................630

31.5.2

SCI Receive Pin (RXD)...............................................................................................630

31.6

eSCI Bus Aborts ..............................................................................................................630

31.7

eSCI Differences from MAC71xx ...................................................................................630

31.8

eSCI Application Usage...................................................................................................631

31.8.1

Enabling the eSCI ........................................................................................................631

31.9

Memory Map and Register Definition.............................................................................631

31.9.1

Memory Map ...............................................................................................................631

31.9.2

Register Descriptions...................................................................................................634

31.9.2.1

SCI Baud Rate Registers .........................................................................................634

31.9.2.2

SCI Control Register 1.............................................................................................635

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