SH7708 datasheet(16/633 Pages) RENESAS

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viii

12.3.3 Reading the Time ................................................................................................. 335

12.3.4 Alarm Function .................................................................................................... 336

12.3.5 Crystal Oscillator Circuit...................................................................................... 337

12.4

Usage Notes ....................................................................................................................... 338

12.4.1 Flag Clearing ........................................................................................................ 338

12.4.2 Register Writes during RTC Count ...................................................................... 338

12.4.3 Usage Note about Periodic Interrupt on RTC ...................................................... 338

Section 13 Serial Communication Interface (SCI) .................................................... 341

13.1

Overview............................................................................................................................ 341

13.1.1 Features ................................................................................................................ 341

13.1.2 Block Diagram...................................................................................................... 342

13.1.3 Pin Configuration ................................................................................................. 343

13.1.4 Register Configuration ......................................................................................... 343

13.2

Register Descriptions......................................................................................................... 344

13.2.1 Receive Shift Register (SCRSR).......................................................................... 344

13.2.2 Receive Data Register (SCRDR).......................................................................... 344

13.2.3 Transmit Shift Register (SCTSR) ........................................................................ 344

13.2.4 Transmit Data Register (SCTDR) ........................................................................ 345

13.2.5 Serial Mode Register (SCSMR) ........................................................................... 345

13.2.6 Serial Control Register (SCSCR) ......................................................................... 348

13.2.7 Serial Status Register (SCSSR)............................................................................ 351

13.2.8 Serial Port Register (SCSPTR) ............................................................................ 355

13.2.9 Bit Rate Register (SCBRR).................................................................................. 356

13.3

Operation ........................................................................................................................... 364

13.3.1 Overview .............................................................................................................. 364

13.3.2 Operation in Asynchronous Mode........................................................................ 366

13.3.3 Multiprocessor Communication ........................................................................... 376

13.3.4 Synchronous Operation ........................................................................................ 384

13.4

SCI Interrupt Sources ........................................................................................................ 394

13.5

Usage Notes ....................................................................................................................... 394

Section 14 Smart Card Interface...................................................................................... 399

14.1

Overview............................................................................................................................ 399

14.1.1 Features ................................................................................................................ 399

14.1.2 Block Diagram...................................................................................................... 400

14.1.3 Pin Configuration ................................................................................................. 401

14.1.4 Register Configuration ......................................................................................... 401

14.2

Register Descriptions......................................................................................................... 401

14.2.1 Smart Card Mode Register (SCSCMR) ............................................................... 402

14.2.2 Serial Status Register (SCSSR)............................................................................ 403

14.3

Operation ........................................................................................................................... 404

14.3.1 Overview .............................................................................................................. 404

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