SH7146 Datasheet, PDF (17/1022 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

12.3.4 Output Level Control/Status Register 2 (OCSR2) ................................................ 507
12.3.5 Input Level Control/Status Register 3 (ICSR3) .................................................... 508
12.3.6 Software Port Output Enable Register (SPOER) .................................................. 510
12.3.7 Port Output Enable Control Register 1 (POECR1)............................................... 511
12.3.8 Port Output Enable Control Register 2 (POECR2)............................................... 513
12.4 Operation ........................................................................................................................... 516
12.4.1 Input Level Detection Operation........................................................................... 517
12.4.2 Output-Level Compare Operation ........................................................................ 518
12.4.3 Release from High-Impedance State..................................................................... 519
12.5 Interrupts............................................................................................................................ 520
12.6 Usage Note......................................................................................................................... 521
12.6.1 Pin State When a Power-On Reset is Issued from the Watchdog Timer .............. 521
Section 13 Watchdog Timer (WDT)..................................................................523
13.1 Features.............................................................................................................................. 523
13.2 Input/Output Pin for WDT................................................................................................. 525
13.3 Register Descriptions ......................................................................................................... 526
13.3.1 Watchdog Timer Counter (WTCNT).................................................................... 526
13.3.2 Watchdog Timer Control/Status Register (WTCSR)............................................ 527
13.3.3 Notes on Register Access...................................................................................... 529
13.4 Operation ........................................................................................................................... 530
13.4.1 Revoking Software Standbys................................................................................ 530
13.4.2 Using Watchdog Timer Mode .............................................................................. 530
13.4.3 Using Interval Timer Mode .................................................................................. 531
13.5 Usage Note......................................................................................................................... 532
13.5.1 WTCNT Setting Value ......................................................................................... 532
Section 14 Serial Communication Interface (SCI) ............................................533
14.1 Features.............................................................................................................................. 533
14.2 Input/Output Pins ............................................................................................................... 535
14.3 Register Descriptions ......................................................................................................... 536
14.3.1 Receive Shift Register (SCRSR)........................................................................... 537
14.3.2 Receive Data Register (SCRDR) .......................................................................... 537
14.3.3 Transmit Shift Register (SCTSR) ......................................................................... 537
14.3.4 Transmit Data Register (SCTDR)......................................................................... 538
14.3.5 Serial Mode Register (SCSMR)............................................................................ 538
14.3.6 Serial Control Register (SCSCR).......................................................................... 541
14.3.7 Serial Status Register (SCSSR) ............................................................................ 544
14.3.8 Serial Port Register (SCSPTR) ............................................................................. 550
14.3.9 Serial Direction Control Register (SCSDCR)....................................................... 552
Rev. 3.00 May 17, 2007 Page xvii of xliv