HD64F7047 datasheet(15/764 Pages) RENESAS

15 / 764 page

Rev. 2.00, 09/04, page xv of xl

11.3.1 Timer Counter (TCNT)........................................................................................ 319

11.3.2 Timer Control/Status Register (TCSR)................................................................ 319

11.3.3 Reset Control/Status Register (RSTCSR)............................................................ 321

11.4

Operation .......................................................................................................................... 322

11.4.1 Watchdog Timer Mode ........................................................................................ 322

11.4.2 Interval Timer Mode ............................................................................................ 323

11.4.3 Clearing Software Standby Mode ........................................................................ 324

11.4.4 Timing of Setting the Overflow Flag (OVF) ....................................................... 324

11.4.5 Timing of Setting the Watchdog Timer Overflow Flag (WOVF)........................ 325

11.5

Interrupts........................................................................................................................... 325

11.6

Usage Notes ...................................................................................................................... 325

11.6.1 Notes on Register Access..................................................................................... 325

11.6.2 TCNT Write and Increment Contention .............................................................. 327

11.6.3 Changing CKS2 to CKS0 Bit Values .................................................................. 327

11.6.4 Changing between Watchdog Timer/Interval Timer Modes................................ 327

11.6.5 System Reset by

WDTOVF Signal......................................................................328

11.6.6 Internal Reset in Watchdog Timer Mode............................................................. 328

11.6.7 Manual Reset in Watchdog Timer Mode ............................................................. 328

11.6.8 Handling of

WDTOVF pin ..................................................................................328

Section 12 Serial Communication Interface (SCI) ............................................329

12.1

Features............................................................................................................................. 329

12.2

Input/Output Pins .............................................................................................................. 331

12.3

Register Descriptions ........................................................................................................ 332

12.3.1 Receive Shift Register (RSR) .............................................................................. 333

12.3.2 Receive Data Register (RDR) .............................................................................. 333

12.3.3 Transmit Shift Register (TSR) ............................................................................. 333

12.3.4 Transmit Data Register (TDR)............................................................................. 333

12.3.5 Serial Mode Register (SMR) ............................................................................... 334

12.3.6 Serial Control Register (SCR) ............................................................................. 335

12.3.7 Serial Status Register (SSR) ................................................................................ 337

12.3.8 Serial Direction Control Register (SDCR)........................................................... 340

12.3.9 Bit Rate Register (BRR) ...................................................................................... 340

12.4

Operation in Asynchronous Mode .................................................................................... 351

12.4.1 Data Transfer Format........................................................................................... 351

12.4.2 Receive Data Sampling Timing and Reception Margin in

Asynchronous Mode ............................................................................................ 353

12.4.3 Clock.................................................................................................................... 354

12.4.4 SCI initialization (Asynchronous mode).............................................................. 355

12.4.5 Data transmission (Asynchronous mode) ............................................................ 356

12.4.6 Serial data reception (Asynchronous mode) ........................................................ 358

12.5

Multiprocessor Communication Function......................................................................... 362

12.5.1 Multiprocessor Serial Data Transmission ............................................................ 364

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