12.6.2

12.6.3

12.6.4

12.6.5

12.6.6

TCNT写入和增量之间的争............................................ ........................................... 449

特别救济行动处之间的争写和比较匹配........................................... .................................. 450

比较之间的争夺比赛甲乙........................................... ............................................. 450

开关内部时钟和TCNT操作........................................... ........................................ 451

中断和模块停止Mode............................................................................................................... 452

第13看门狗定时器.............................................................................................................453

13.1 Overview................................................................................................................................................................... 453

13.1.1特点....................................................................................................................................................... 453

13.1.2块Diagram............................................................................................................................................. 454

13.1.3引脚配置........................................................................................................................................454

13.1.4寄存器配置................................................................................................................................455

13.2注册Descriptions................................................................................................................................................456

13.2.1定时器计数器（ TCNT ） ............................................................................................................................... 456

13.2.2定时器控制/状态寄存器（ TCSR ） ....................................................................................................... 456

13.2.3复位控制/状态寄存器（ RSTCSR ） ....................................... .................................................. .......... 457

对寄存器访问13.2.4注意事项............................................................................................................................459

13.3操作..................................................................................................................................................................460

13.3.1看门狗定时器Operation......................................................................................................................... 460

13.3.2间隔定时器Operation............................................................................................................................. 461

13.3.3时序设置溢出标志的(OVF)..................................................................................................... 461

13.3.4定时设置看门狗定时器溢出标志（ WOVF ）的.................................... ............................ 462

13.4 Interrupts................................................................................................................................................................... 462

13.5使用注意事项..............................................................................................................................................................463

定时器计数器的13.5.1争（ TCNT ）收件和增量..................................... ....................... 463

13.5.2更改CKS2价值为CKS0............................................................................................................. 463

看门狗定时器模式和间隔定时器模式间切换13.5.3 ...................................... ................. 463

13.5.4系统由WDTOVF信号复位............................................................................................................. 463

在看门狗定时器模式13.5.5内部复位....................................................................................................464

第14章串行通信接口（ SCI ） .......................................... ................................. 465

14.1 Overview................................................................................................................................................................... 465

14.1.1特点....................................................................................................................................................... 465

14.1.2块Diagram............................................................................................................................................. 467

14.1.3引脚配置........................................................................................................................................467

14.1.4寄存器配置................................................................................................................................468

14.2注册Descriptions................................................................................................................................................469

14.2.1接收移位寄存器(RSR)......................................................................................................................469

14.2.2接收数据寄存器（ RDR ） ..................................................................................................................... 469

14.2.3发送移位寄存器(TSR)..................................................................................................................... 469

14.2.4发送数据寄存器（ TDR ） ....................................................................................................................470

14.2.5串行模式寄存器(SMR)....................................................................................................................... 470

14.2.6串行控制寄存器(SCR)..................................................................................................................... 472

14.2.7串行状态寄存器(SSR)........................................................................................................................475

14.2.8比特率寄存器(BRR)..............................................................................................................................478

14.2.9智能卡模式寄存器（ SCMR ） ........................................................................................................... 485

14.2.10模块停止控制寄存器（ MSTPCR ） ........................................ .................................................. 486 .......

14.3操作..................................................................................................................................................................487

14.3.1概述..................................................................................................................................................... 487

14.3.2在异步Mode............................................................................................................... 489

14.3.3多处理器通信Function................................................................................................... 499

14.3.4运行在时钟同步模式..................................................................................................505

二十四的Rev.6.00 Oct.28.2004第十七页

REJ09B0138-0600H