MC2722 用户手册
目½
1
V1.0
2
3
4
5
6
7
8
产品简介
....................................................................................................................................................... 4
1.1
产品特性
....................................................................................................................................... 4
1.2
订购信息
....................................................................................................................................... 5
1.3
引脚排列
....................................................................................................................................... 6
1.4
引脚说明
....................................................................................................................................... 7
CPU
及存储器
.............................................................................................................................................. 8
2.1
指令集
........................................................................................................................................... 8
2.2
程序存储器
................................................................................................................................. 10
2.3
数据存储器
................................................................................................................................. 11
2.4
堆栈
............................................................................................................................................. 12
2.5
用户配½字
................................................................................................................................. 13
2.6
控制寄存器
................................................................................................................................. 15
系统时钟
..................................................................................................................................................... 18
3.1
外接晶½振荡器
......................................................................................................................... 18
3.2
外部
RC
振荡器
.......................................................................................................................... 18
3.3
外部时钟输入
............................................................................................................................. 18
3.4
内½高频
RC
振荡器
.................................................................................................................. 19
3.5
内½½频
RC
振荡器
.................................................................................................................. 19
3.6
系统工½模式
............................................................................................................................. 19
3.7
高速模式
..................................................................................................................................... 21
3.8
½速模式
..................................................................................................................................... 21
3.9
休眠模式
..................................................................................................................................... 21
3.10
空闲模式
..................................................................................................................................... 22
复½
............................................................................................................................................................. 23
4.1
复½条件
..................................................................................................................................... 23
4.2
上电复½
..................................................................................................................................... 23
4.3
外部复½
..................................................................................................................................... 23
4.4
½电压复½
................................................................................................................................. 23
4.5
看门狗复½
................................................................................................................................. 24
I/O
端口
....................................................................................................................................................... 25
5.1
IO
工½模式
................................................................................................................................ 25
5.2
上拉电阻控制
............................................................................................................................. 26
5.3
端口模式控制
............................................................................................................................. 27
5.4
端口电平唤醒功½
..................................................................................................................... 27
定时器
......................................................................................................................................................... 28
6.1
看门狗定时器
WDT ................................................................................................................... 28
6.2
定时器
T0.................................................................................................................................... 28
6.3
定时器
T1.................................................................................................................................... 29
蜂鸣器输出
................................................................................................................................................. 32
7.1
BUZZER
概述
............................................................................................................................. 32
7.2
BUZZER
相关寄存器
................................................................................................................. 32
模数½换器
................................................................................................................................................. 33
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MC2722 用户手册
V1.0
8.1
ADC
概述
.................................................................................................................................... 33
8.2
ADC
½换时序图
........................................................................................................................ 33
8.3
ADC
操½步骤
............................................................................................................................ 33
8.4
ADC
相关寄存器
........................................................................................................................ 34
9
中断
............................................................................................................................................................. 36
9.1
外部中断
..................................................................................................................................... 36
9.2
定时器中断
................................................................................................................................. 36
9.3
ADC
½换中断
............................................................................................................................ 37
9.4
中断相关寄存器
......................................................................................................................... 37
10
电气参数
..................................................................................................................................................... 39
10.1
极限参数
..................................................................................................................................... 39
10.2
直流特性参数
............................................................................................................................. 39
10.3
ADC
特性参数
............................................................................................................................ 40
10.4
交流电气参数
............................................................................................................................. 40
11
特性曲线图
................................................................................................................................................. 42
11.1
输入½密特电压
VS
电源电压
................................................................................................. 42
11.2
上拉电阻
VS
电源电压
............................................................................................................ 43
11.3
驱动电流
VS
端口电压
............................................................................................................ 44
11.4
内部高频
RC
动态功耗
VS
电源电压
..................................................................................... 46
11.5
外部
RC
时钟源
VS
电源电压
................................................................................................. 49
11.6
外部晶振功耗
VS
电源电压
.................................................................................................... 52
11.7
内部½频
RC VS
电源电压
....................................................................................................... 53
11.8
静态功耗
VS
温度
.................................................................................................................... 55
11.9
内部高频
RC VS
电源电压/温度
.............................................................................................. 56
12
封装外½尺寸
............................................................................................................................................. 58
13
版本修订记½
............................................................................................................................................. 59
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