广州周立功单片机发展有限公司

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P89LPC915/916/917 器件手册
1.概述 .............................................................................................................................................4 2.特性 .............................................................................................................................................4 3.附加特性 .....................................................................................................................................4 4.订购信息 .....................................................................................................................................5 4.1 订购选项............................................................................................................................5 5.功能框图 .....................................................................................................................................6 6.管脚信息 .....................................................................................................................................8 6.1 管脚....................................................................................................................................8 6.2 管脚描述............................................................................................................................9 7.逻辑符号 ...................................................................................................................................14 7.1 产品对比..........................................................................................................................15 8.特殊功能寄存器 .......................................................................................................................15 9.功能描述 ...................................................................................................................................24 9.1 增强型 CPU.....................................................................................................................24 9.2 时钟..................................................................................................................................24 9.2.1 时钟定义...............................................................................................................24 9.2.2 CPU 时钟(OSCCLK).............................................................................................24 9.2.3 时钟输出(P89LPC917) ...................................................................................24 9.3 片内 RC 振荡器选项 ......................................................................................................24 9.4 看门狗振荡器选项..........................................................................................................25 9.5 外部时钟输入选项..........................................................................................................25 9.6 CPU 时钟(CCLK)唤醒延迟 .......................................................................................25 9.7 CPU 时钟(CCLK)调整:DIVM 寄存器....................................................................25 9.8 低功耗选择......................................................................................................................26 9.9 A/D 转换器 .......................................................................................................................26 9.9.1 概述.......................................................................................................................26 9.9.2 特性.......................................................................................................................26 9.9.3 A/D 工作模式 ........................................................................................................27 9.9.4 转换起动模式.......................................................................................................27 9.9.5 界限制中断...........................................................................................................28 9.9.6 DAC 输出到高输出阻抗的 I/O 口 .......................................................................28 9.9.7 时钟分频器...........................................................................................................28 9.9.8 掉电和空闲模式...................................................................................................28 9.10 存储器结构....................................................................................................................28 9.11 中断................................................................................................................................28 9.11.1 外部中断输入.....................................................................................................29 9.12 I/O 口 ..............................................................................................................................30 9.12.1 I/O 口配置 ...........................................................................................................30 9.12.2 准双向口输出配置.............................................................................................30 9.12.3 开漏输出配置.....................................................................................................31 9.12.4 仅为输入配置.....................................................................................................31

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