H8S20103 datasheet(21/992 Pages) RENESAS

21 / 992 page

Rev. 1.00 Oct. 03, 2008 Page xxi of xxvi

19.3.2

Watchdog Timer Setting Flow.......................................................................... 673

19.3.3

Watchdog Timer Periodic Interrupt .................................................................. 674

19.4

Usage Notes ...................................................................................................................... 675

19.4.1

Notes on System Design ................................................................................... 675

19.4.2

Notes on Stopping the Watchdog Timer or Switching the Count Clock .......... 675

Section 20 Serial Communication Interface 3 (SCI3, IrDA).............................677

20.1

Features............................................................................................................................. 677

20.2

Register Descriptions ........................................................................................................ 682

20.2.1

Receive Shift Register (RSR) ........................................................................... 683

20.2.2

Receive Data Register (RDR) ........................................................................... 683

20.2.3

Transmit Shift Register (TSR) .......................................................................... 683

20.2.4

Transmit Data Register (TDR).......................................................................... 684

20.2.5

Serial Mode Register (SMR) ............................................................................ 684

20.2.6

Serial Control Register 3 (SCR3)...................................................................... 686

20.2.7

Serial Status Register (SSR) ............................................................................. 688

20.2.8

Bit Rate Register (BRR) ................................................................................... 690

20.2.9

Sampling Mode Register (SPMR) .................................................................... 695

20.2.10

IrDA Control Register (IrCR) ........................................................................... 695

20.3

Operation in Asynchronous Mode .................................................................................... 697

20.3.1

Clock................................................................................................................. 697

20.3.2

SCI3 Initialization............................................................................................. 698

20.3.3

Data Transmission ............................................................................................ 700

20.3.4

Data Reception.................................................................................................. 702

20.4

Operation in Clocked Synchronous Mode ........................................................................ 706

20.4.1

Clock................................................................................................................. 706

20.4.2

SCI3 Initialization............................................................................................. 706

20.4.3

Data Transmission ............................................................................................ 707

20.4.4

Data Reception (Clocked Synchronous Mode)................................................. 709

20.4.5

Simultaneous Data Transmission and Reception .............................................. 711

20.5

Multiprocessor Communication Function......................................................................... 713

20.5.1

Multiprocessor Data Transmission ................................................................... 714

20.5.2

Multiprocessor Data Reception......................................................................... 716

20.6

IrDA Operation ................................................................................................................. 720

20.6.1

Transmission..................................................................................................... 721

20.6.2

Reception .......................................................................................................... 721

20.6.3

High-Level Pulse Width Selection.................................................................... 722

20.7

Noise Canceler..................................................................................................................723

20.8

Interrupt Requests ............................................................................................................. 724

20.9

Usage Notes ...................................................................................................................... 725

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