ix
14.2.9 Second Alarm Register (RSECAR)...................................................................... 413
14.2.10 Minute Alarm Register (RMINAR) ..................................................................... 413
14.2.11 Hour Alarm Register (RHRAR) ........................................................................... 414
14.2.12 Day of Week Alarm Register (RWKAR) ............................................................ 414
14.2.13 Date Alarm Register (RDAYAR) ........................................................................ 415
14.2.14 Month Alarm Register (RMONAR) .................................................................... 416
14.2.15 RTC Control Register 1 (RCR1) .......................................................................... 416
14.2.16 RTC Control Register 2 (RCR2) .......................................................................... 418
14.3
RTC Operation .................................................................................................................. 419
14.3.1 Initial Settings of Registers after Power-On ........................................................ 419
14.3.2 Setting the Time ................................................................................................... 419
14.3.3 Reading the Time ................................................................................................. 421
14.3.4 Alarm Function .................................................................................................... 422
14.3.5 Crystal Oscillator Circuit...................................................................................... 422
Section 15 Serial Communication Interface (SCI) .................................................... 425
15.1
Overview............................................................................................................................ 425
15.1.1 Features ................................................................................................................ 425
15.1.2 Block Diagram...................................................................................................... 426
15.1.3 Pin Configuration ................................................................................................. 429
15.1.4 Register Configuration ......................................................................................... 430
15.2
Register Descriptions......................................................................................................... 430
15.2.1 Receive Shift Register .......................................................................................... 430
15.2.2 Receive Data Register .......................................................................................... 430
15.2.3 Transmit Shift Register ........................................................................................ 431
15.2.4 Transmit Data Register......................................................................................... 431
15.2.5 Serial Mode Register............................................................................................ 431
15.2.6 Serial Control Register ......................................................................................... 434
15.2.7 Serial Status Register............................................................................................ 437
15.2.8 Port SC Control Register (SCPCR)/Port SC Data Register (SCPDR) ................. 441
15.2.9 Bit Rate Register (SCBRR).................................................................................. 442
15.3
Operation ........................................................................................................................... 451
15.3.1 Overview .............................................................................................................. 451
15.3.2 Operation in Asynchronous Mode........................................................................ 453
15.3.3 Multiprocessor Communication ........................................................................... 463
15.3.4 Synchronous Operation ........................................................................................ 471
15.4
SCI Interrupt Sources ........................................................................................................ 481
15.5
Usage Notes ....................................................................................................................... 481
Section 16 Smart Card Interface...................................................................................... 485
16.1
Overview............................................................................................................................ 485
16.1.1 Features ................................................................................................................ 485
16.1.2 Block Diagram...................................................................................................... 486