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Section 22 Clock Pulse Generator .................................................................. 609
22.1 Overview ....................................................................................................................... 609
22.1.1 Block Diagram.................................................................................................. 609
22.1.2 Register Configuration...................................................................................... 610
22.2 Register Descriptions ..................................................................................................... 610
22.2.1 Standby Control Register (SBYCR) .................................................................. 610
22.2.2 Low-Power Control Register (LPWRCR) ......................................................... 611
22.3 Oscillator ....................................................................................................................... 612
22.3.1 Connecting a Crystal Resonator ........................................................................ 612
22.3.2 External Clock Input......................................................................................... 614
22.4 Duty Adjustment Circuit ................................................................................................ 617
22.5 Medium-Speed Clock Divider........................................................................................ 617
22.6 Bus Master Clock Selection Circuit................................................................................ 617
22.7 Subclock Input Circuit ................................................................................................... 618
22.8 Subclock Waveform Shaping Circuit ............................................................................. 618
Section 23 Power-Down State........................................................................ 619
23.1 Overview ....................................................................................................................... 619
23.1.1 Register Configuration...................................................................................... 623
23.2 Register Descriptions ..................................................................................................... 623
23.2.1 Standby Control Register (SBYCR) .................................................................. 623
23.2.2 Low-Power Control Register (LPWRCR) ......................................................... 625
23.2.3 Timer Control/Status Register (TCSR).............................................................. 627
23.2.4 Module Stop Control Register (MSTPCR) ........................................................ 628
23.3 Medium-Speed Mode..................................................................................................... 629
23.4 Sleep Mode .................................................................................................................... 630
23.4.1 Sleep Mode....................................................................................................... 630
23.4.2 Clearing Sleep Mode ........................................................................................ 630
23.5 Module Stop Mode......................................................................................................... 631
23.5.1 Module Stop Mode ........................................................................................... 631
23.5.2 Usage Note ....................................................................................................... 632
23.6 Software Standby Mode ................................................................................................. 632
23.6.1 Software Standby Mode .................................................................................... 632
23.6.2 Clearing Software Standby Mode...................................................................... 632
23.6.3 Setting Oscillation Settling Time after Clearing Software Standby Mode.......... 633
23.6.4 Software Standby Mode Application Example .................................................. 634
23.6.5 Usage Note ....................................................................................................... 635
23.7 Hardware Standby Mode................................................................................................ 635
23.7.1 Hardware Standby Mode................................................................................... 635
23.7.2 Hardware Standby Mode Timing ...................................................................... 636
23.8 Watch Mode .................................................................................................................. 637
23.8.1 Watch Mode ..................................................................................................... 637
23.8.2 Clearing Watch Mode ....................................................................................... 637