6.7

6.8

空闲周期..........................................................................................................................133

公共汽车Arbitration..................................................................................................................134

6.8.1优先级的总线大师........................................... ............................................. 134

6.8.2总线传输时序............................................ ................................................ 134

第7章数据传送控制器（ DTC ） .......................................... .............. 135

7.1

7.2

产品特点.............................................................................................................................135

注册说明........................................................................................................136

7.2.1 DTC模式寄存器（ MRA ） ........................................ ..................................... 137

7.2.2 DTC模式寄存器B（ MRB ） ........................................ ..................................... 138

7.2.3 DTC源地址寄存器（ SAR） ........................................ .......................... 138

7.2.4 DTC目标地址寄存器（ DAR ） ........................................ .................. 138

7.2.5 DTC传输计数寄存器A（ CRA ） ....................................... ........................ 138

7.2.6 DTC传输计数寄存器B （ CRB ） ....................................... ........................ 139

7.2.7 DTC使能寄存器（ DTCER ） ......................................... ................................ 139

7.2.8 DTC向量寄存器（ DTVECR ） ......................................... ............................... 140

启动源............................................................................................................140

注册信息和DTC向量表的位置.......................................... ....... 141

Operation...........................................................................................................................144

7.5.1正常模式.......................................................................................................145

7.5.2重复模式........................................................................................................145

7.5.3数据块传输模式............................................ ............................................... 146

7.5.4链Transfer......................................................................................................147

7.5.5中断..............................................................................................................148

7.5.6操作时序............................................. .................................................. ..149

DTC执行国家7.5.7数.......................................... .............................. 150

对于使用DTC程序.............................................. .................................................. 151

7.6.1活化中断............................................ ............................................. 151

7.6.2活化软件............................................ ............................................ 151

使用DTC的例子..................................................................................................152

7.7.1正常模式.......................................................................................................152

7.7.2软件激活............................................. ................................................ 153

用法Notes.......................................................................................................................154

7.8.1设置模块停止模式........................................... ....................................... 154

7.8.2片RAM......................................................................................................154

7.8.3 DTCE位设置............................................ .................................................. ... 154

7.8.4设置要求上的输入子激活模式或计时模式.......................... 154

7.8.5 DTC启动被SCI ， IIC ，LPC的中断源或A / D转换器........ 154

7.3

7.4

7.5

7.6

7.7

7.8

第8个I / O端口............................................ ................................................ 155

8.1

8.2

概观...........................................................................................................................155

端口1 .................................................................................................................................160

8.2.1口数据方向寄存器（ P1DDR ） ....................................... ...................... 160

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