SH7101 datasheet(18/486 Pages) RENESAS

18 / 486 page

Rev.2.00 Sep. 27, 2007 Page xviii of xxxiv

REJ09B0394-0200

Section 10 Serial Communication Interface (SCI) ............................................277

10.1

Features .............................................................................................................................. 277

10.2

Input/Output Pins ............................................................................................................... 279

10.3

Register Descriptions ......................................................................................................... 279

10.3.1 Receive Shift Register (RSR) ............................................................................... 280

10.3.2 Receive Data Register (RDR) ............................................................................... 280

10.3.3 Transmit Shift Register (TSR) .............................................................................. 280

10.3.4 Transmit Data Register (TDR).............................................................................. 280

10.3.5 Serial Mode Register (SMR) ................................................................................ 281

10.3.6 Serial Control Register (SCR)............................................................................... 283

10.3.7 Serial Status Register (SSR) ................................................................................. 285

10.3.8 Serial Direction Control Register (SDCR)............................................................ 287

10.3.9 Bit Rate Register (BRR) ....................................................................................... 287

10.4

Operation in Asynchronous Mode ..................................................................................... 296

10.4.1 Data Transfer Format............................................................................................ 296

10.4.2 Receive Data Sampling Timing and Reception Margin

in Asynchronous Mode ......................................................................................... 298

10.4.3 Clock..................................................................................................................... 299

10.4.4 SCI Initialization (Asynchronous Mode) .............................................................. 300

10.4.5 Data Transmission (Asynchronous Mode)............................................................ 301

10.4.6 Serial Data Reception (Asynchronous Mode)....................................................... 303

10.5

Multiprocessor Communication Function.......................................................................... 307

10.5.1 Multiprocessor Serial Data Transmission ............................................................. 309

10.5.2 Multiprocessor Serial Data Reception .................................................................. 310

10.6

Operation in Clocked Synchronous Mode ......................................................................... 313

10.6.1 Clock..................................................................................................................... 313

10.6.2 SCI Initialization (Clocked Synchronous Mode) .................................................. 314

10.6.3 Serial Data Transmission (Clocked Synchronous Mode) ..................................... 315

10.6.4 Serial Data Reception (Clocked Synchronous Mode)........................................... 318

10.6.5 Simultaneous Serial Data Transmission and Reception

(Clocked Synchronous Mode) .............................................................................. 320

10.7

Interrupts Sources .............................................................................................................. 322

10.7.1 Interrupts in Normal Serial Communication Interface Mode ............................... 322

10.8

Usage Notes ....................................................................................................................... 323

10.8.1 TDR Write and TDRE Flag .................................................................................. 323

10.8.2 Module Standby Mode Setting ............................................................................. 323

10.8.3 Break Detection and Processing (Asynchronous Mode Only).............................. 323

10.8.4 Sending a Break Signal (Asynchronous Mode Only) ........................................... 323

10.8.5 Receive Error Flags and Transmit Operations

(Clocked Synchronous Mode Only) ..................................................................... 324

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