SH7101 datasheet(14/560 Pages) RENESAS

14 / 560 page

Rev.1.00 Sep. 18, 2008 Page xiv of xxxiv

REJ09B0069-0100

9.3.2

Timer Control/Status Register (TCSR)................................................................ 273

9.3.3

Reset Control/Status Register (RSTCSR) ............................................................ 275

9.4

Operation .......................................................................................................................... 276

9.4.1

Watchdog Timer Mode ........................................................................................ 276

9.4.2

Interval Timer Mode ............................................................................................ 277

9.4.3

Clearing Software Standby Mode ........................................................................ 278

9.4.4

Timing of Setting the Overflow Flag (OVF) ....................................................... 278

9.4.5

Timing of Setting the Watchdog Timer Overflow Flag (WOVF)........................ 279

9.5

Interrupt Source ................................................................................................................ 279

9.6

Usage Notes ...................................................................................................................... 279

9.6.1

Notes on Register Access..................................................................................... 279

9.6.2

TCNT Write and Increment Contention .............................................................. 281

9.6.3

Changing CKS2 to CKS0 Bit Values .................................................................. 281

9.6.4

Changing between Watchdog Timer/Interval Timer Modes................................ 281

9.6.5

System Reset by

WDTOVF Signal...................................................................... 282

9.6.6

Internal Reset in Watchdog Timer Mode............................................................. 282

9.6.7

Manual Reset in Watchdog Timer Mode ............................................................. 282

9.6.8

Notes on Using

WDTOVF Pin ............................................................................ 282

Section 10 Serial Communication Interface (SCI) ............................................283

10.1

Features ............................................................................................................................. 283

10.2

Input/Output Pins .............................................................................................................. 285

10.3

Register Descriptions ........................................................................................................ 285

10.3.1 Receive Shift Register (RSR) .............................................................................. 286

10.3.2 Receive Data Register (RDR) .............................................................................. 286

10.3.3 Transmit Shift Register (TSR) ............................................................................. 286

10.3.4 Transmit Data Register (TDR)............................................................................. 286

10.3.5 Serial Mode Register (SMR) ............................................................................... 287

10.3.6 Serial Control Register (SCR).............................................................................. 288

10.3.7 Serial Status Register (SSR) ................................................................................ 290

10.3.8 Serial Direction Control Register (SDCR)........................................................... 292

10.3.9 Bit Rate Register (BRR) ...................................................................................... 292

10.4

Operation in Asynchronous Mode .................................................................................... 301

10.4.1 Data Transfer Format........................................................................................... 301

10.4.2 Receive Data Sampling Timing and Reception Margin in

Asynchronous Mode ............................................................................................ 303

10.4.3 Clock.................................................................................................................... 304

10.4.4 SCI Initialization (Asynchronous Mode) ............................................................. 305

10.4.5 Data Transmission (Asynchronous Mode)........................................................... 306

10.4.6 Serial Data Reception (Asynchronous Mode)...................................................... 308

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