初步W79E225A / 227A数据表

12.2

定时器/计数器2 ............................................................................................................ 98

12.2.1

12.2.2

12.2.3

12.2.4

捕获Mode...............................................................................................................99

自动重载模式下，加计数........................................... ......................................... 99

自动重载模式下，数/下......................................... .............................. 100

波特率发生器模式.............................................. ......................................... 101

13.

14.

15.

看门狗TIMER............................................................................................................... 102

脉冲宽度调制（ PWM）输出......................................... ........................ 105

14.1 PWM功能............................................................................................................ 105

14.2 PWM控制寄存器.............................................. ................................................ 106

14.3 PWM引脚结构.............................................. .................................................. ... 108

14.4互补PWM带死区时间和覆盖功能.................................. 111

14.5死区时间插入............................................. .................................................. 112 ....

14.6 PWM输出改写.............................................. .................................................. 113

14.7边沿对齐的PWM （向上计数器） ......................................... ....................................... 116

14.8中心对齐的PWM （加/减计数器） ........................................ ............................ 119

14.9单次（向上计数器） .......................................... ................................................. 121

14.10

智能故障检测............................................... ............................................... 124

14.11

PWM掉电/唤醒程序........................................... ..................... 126

运动反馈模块............................................... .............................................. 128

15.1输入捕捉模块（ IC ） ........................................... ............................................... 128

15.1.1

15.1.2

比较Mode...........................................................................................................136

重载模式..............................................................................................................136

免费计数模式...................................................................................................138

比较计数模式.............................................. .............................................. 138

X2 / X4计数modes...............................................................................................138

方向Count.......................................................................................................138

向上计数...............................................................................................................140

Down-Counting...........................................................................................................140

15.2

正交编码器接口（ QEI ） ............................................ .............................. 136

15.2.1

15.2.2

15.2.3

15.2.4

15.2.5

15.2.6

16.

17.

串行端口........................................................................................................................ 141

16.1模式0 ........................................................................................................................ 141

16.2模式1 ........................................................................................................................ 142

16.3模式2 ........................................................................................................................ 143

16.4模式3 ........................................................................................................................ 144

16.5帧错误检测.............................................. ............................................... 144

16.6多机通信............................................... .................................. 145

I2C串行端口............................................................................................................... 146

17.1 SIO端口...................................................................................................................... 146

17.2 I2C控制寄存器............................................. ............................................. 146

17.2.1

17.2.2

17.2.3

从机地址寄存器， I2ADDR ............................................. ................................ 147

数据寄存器， I2DAT .............................................. .................................................. 0.147

控制寄存器， I2CON.............................................................................................147

-2-

出版日期： 2007年12月14日

修订A2.0