
2
5.12.8 报警寄存器组 ................................................................................................. 64
5.12.9 RTC 辅助控制寄存器组 ................................................................................ 64
5.12.10 完整时间寄存器 ............................................................................................. 65
5.12.11 时间计数器组 ................................................................................................. 67
5.12.12 RTC 时间校准 ................................................................................................ 68
5.12.13 通用寄存器组 ................................................................................................. 69
5.12.14 基本操作 ......................................................................................................... 69
5.12.15 RTC 使用注意事项 ........................................................................................ 70
5.12.16 RTC 外部 32KHz 振荡器元件的选择 ........................................................... 70
5.12.17 RTC 中断设置 ................................................................................................ 71
5.12.18 使用示例 ......................................................................................................... 73
5.13 A/D 转换器(ADC) ............................................................................................ 74
5.13.1 概述 ................................................................................................................. 74
5.13.2 特性 ................................................................................................................. 74
5.13.3 引脚描述 ......................................................................................................... 74
5.13.4 寄存器描述 ..................................................................................................... 74
5.13.5 基本操作 ......................................................................................................... 80
5.13.6 ADC 中断设置 ............................................................................................... 81
5.13.7 ADC 应用举例 ............................................................................................... 82
5.14 D/A 转换器(DAC) ............................................................................................ 84
5.14.1 特性 ................................................................................................................. 84
5.14.2 引脚描述 ......................................................................................................... 84
5.14.3 寄存器描述 ..................................................................................................... 84
5.14.4 操作 ................................................................................................................. 85
5.14.5 应用举例 ......................................................................................................... 86
5.15 看门狗定时器(WDT) ............................................................................................. 87
5.15.1 特性 ................................................................................................................. 87
5.15.2 描述 ................................................................................................................. 87
5.15.3 结构 ................................................................................................................. 88
5.15.4 寄存器描述 ..................................................................................................... 88
5.15.5 看门狗定时器值寄存器 ................................................................................. 90
5.15.6 看门狗定时器时钟源选择寄存器
................................................................. 91
5.15.7 WDT 中断 ....................................................................................................... 91
5.15.8 使用示例 ......................................................................................................... 92
5.16 Flash 存储器接口与编程 ....................................................................................... 94
5.16.1 Flash 存储系统 ............................................................................................... 94
5.16.2 Flash Boot ....................................................................................................... 95
5.16.3 ISP—在系统编程 ......................................................................................... 101
5.16.4 IAP-在应用编程 ........................................................................................ 109
第 6 章 I
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S 控制器 ................................................................................................... 115
6.1 概述 ....................................................................................................................... 115
6.2 特性 ....................................................................................................................... 115
6.3 引脚描述 ............................................................................................................... 116
6.4 总线描述 ............................................................................................................... 116
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