HD64F2144B datasheet(15/546 Pages) RENESAS

15 / 546 page

Rev. 1.00 Jun.24, 2005 Page xv of xxxii

11.6.5 System Reset by

RESO Signal (Available for H8S/2144B) ................................. 270

11.6.6 Counter Values during Transitions between High-Speed, Sub-Active,

and Watch Modes ................................................................................................. 270

Section 12 Serial Communication Interface (SCI and IrDA) ..............................271

12.1

Features.............................................................................................................................. 271

12.2

Input/Output Pins ...............................................................................................................273

12.3

Register Descriptions ......................................................................................................... 273

12.3.1 Receive Shift Register (RSR) ............................................................................... 274

12.3.2 Receive Data Register (RDR) ............................................................................... 274

12.3.3 Transmit Data Register (TDR).............................................................................. 274

12.3.4 Transmit Shift Register (TSR) .............................................................................. 274

12.3.5 Serial Mode Register (SMR) ................................................................................ 275

12.3.6 Serial Control Register (SCR) .............................................................................. 277

12.3.7 Serial Status Register (SSR) ................................................................................. 279

12.3.8 Serial Interface Mode Register (SCMR)............................................................... 281

12.3.9 Bit Rate Register (BRR) ....................................................................................... 282

12.3.10 Keyboard Comparator Control Register (KBCOMP)........................................... 289

12.4

Operation in Asynchronous Mode ..................................................................................... 290

12.4.1 Data Transfer Format............................................................................................ 290

12.4.2 Receive Data Sampling Timing and Reception Margin in

Asynchronous Mode ............................................................................................. 292

12.4.3 Clock..................................................................................................................... 293

12.4.4 SCI Initialization (Asynchronous Mode) .............................................................. 294

12.4.5 Data Transmission (Asynchronous Mode)............................................................ 295

12.4.6 Serial Data Reception (Asynchronous Mode)....................................................... 297

12.5

Multiprocessor Communication Function.......................................................................... 301

12.5.1 Multiprocessor Serial Data Transmission ............................................................. 303

12.5.2 Multiprocessor Serial Data Reception .................................................................. 305

12.6

Operation in Clock Synchronous Mode ............................................................................. 308

12.6.1 Clock..................................................................................................................... 308

12.6.2 SCI Initialization (Clock Synchronous Mode)...................................................... 309

12.6.3 Serial Data Transmission (Clock Synchronous Mode) ......................................... 310

12.6.4 Serial Data Reception (Clock Synchronous Mode) .............................................. 313

12.6.5 Simultaneous Serial Data Transmission and Reception

(Clock Synchronous Mode) .................................................................................. 316

12.7

IrDA Operation ..................................................................................................................318

12.8

Interrupt Sources................................................................................................................ 321

12.9

Usage Notes ....................................................................................................................... 322

12.9.1 Module Stop Mode Setting ................................................................................... 322

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