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CX32L003

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CX32L003

ARM

Cortex

-M0+ 32 位微控制器

用户参考手册

目录    CX32L003 用户参考手册 
  Rev.1.0.2, 2019/11/29  2/472 
目录 
目录 
目录 ................................................................................................................... 2 
图索引 .............................................................................................................. 22 
表索引 .............................................................................................................. 29 
简介 ............................................................................................................ 31 
产品特性 .................................................................................................... 32 
产品功能概述 ............................................................................................. 33 
1  32 位 Cortex
®
-M0+内核 ........................................................................................ 33 
2  存储器(Memory) ................................................................................................... 33 
2.1  嵌入式闪存存储器(Flash) .......................................................................................... 33 
2.2  内置 SRAM ............................................................................................................... 33 
3  时钟系统 ................................................................................................................ 33 
4  工作模式 ................................................................................................................ 33 
5  中断控制器(NVIC) ................................................................................................. 35 
6  复位控制器 ............................................................................................................ 36 
7  通用 IO 端口(GPIO) ............................................................................................... 36 
8  定时器和看门狗 ..................................................................................................... 36 
8.1  高级控制定时器(TIM1) .............................................................................................. 37 
8.2  通用定时器(TIM2) ..................................................................................................... 37 
8.3  可编程计数器阵列(PCA) ........................................................................................... 37 
8.4  低功耗定时器(LPTIM) ............................................................................................... 37 
8.5  基础定时器(TIM10/TIM11) ........................................................................................ 37 
8.6  独立看门狗(IWDG) .................................................................................................... 37 
8.7  系统窗口看门狗(WWDG) .......................................................................................... 37 
8.8  SysTick 定时器(SYST) .............................................................................................. 38 
9  实时时钟(RTC) ...................................................................................................... 38 
10  通用异步收发器(UART0/UART1) ....................................................................... 38 
11  低功耗通用异步收发器(LPUART) ...................................................................... 38 
12  串行外设接口(SPI) ............................................................................................. 38 
13  I2C 接口(I2C) ..................................................................................................... 38 
14  One-Wire 接口(OWIRE) ..................................................................................... 38 

目录    CX32L003 用户参考手册 
  Rev.1.0.2, 2019/11/29  3/472 
15  蜂鸣器(BEEP) .................................................................................................... 38 
16  自唤醒定时器(AWK) ........................................................................................... 38 
17  时钟校准/监测模块(CLKTRIM) ........................................................................... 39 
18  唯一 ID 号(UID) .................................................................................................. 39 
19  循环冗余校验计算单元(CRC) ............................................................................. 39 
20  模拟/数字转换器(ADC) ....................................................................................... 39 
21  低电压检测器(LVD) ............................................................................................ 39 
22  电压比较器(VC) .................................................................................................. 39 
23  嵌入式调试系统 .................................................................................................. 39 
24  加密型嵌入式 Debug 支持(DBG) ....................................................................... 39 
系统和存储器概要 ...................................................................................... 40 
1  系统架构图 ............................................................................................................ 40 
2  存储器映射 ............................................................................................................ 42 
3  存储空间和模块地址 .............................................................................................. 43 
4  内嵌 SRAM ............................................................................................................ 44 
5  Flash 存储器 ......................................................................................................... 44 
5.1  内嵌的自举程序(Bootloader) ..................................................................................... 44 
工作模式和电源管理 .................................................................................. 45 
1  运行模式(Active Mode) ........................................................................................ 45 
2  休眠模式(Sleep Mode) .......................................................................................... 47 
3  深度休眠模式(Deep Sleep Mode) ......................................................................... 49 
4  Cortex
®
-M0+内核系统控制寄存器(SCR) ............................................................... 51 
系统复位与时钟(RCC) ............................................................................... 52 
1  复位 ....................................................................................................................... 52 
1.1  复位控制器介绍 ........................................................................................................ 52 
1.2  复位源 ....................................................................................................................... 52 
2  系统时钟 ................................................................................................................ 53 
2.1  系统时钟树................................................................................................................ 54 
2.2  内部高速 RC 时钟 HIRC ............................................................................................ 55 
2.3  内部低速 RC 时钟 LIRC ............................................................................................ 55 
2.4  外部高速晶振时钟 HXT ............................................................................................. 55 
2.5  外部低速晶振时钟 LXT .............................................................................................. 55 
2.6  系统时钟启动过程 ..................................................................................................... 55 

目录    CX32L003 用户参考手册 
  Rev.1.0.2, 2019/11/29  4/472 
2.7  系统时钟切换 ............................................................................................................ 56 
2.8  系统时钟输出 ............................................................................................................ 57 
2.9  系统时钟安全控制 ..................................................................................................... 58 
2.10  IWDG 时钟 ................................................................................................................ 58 
2.11  RTC 时钟 .................................................................................................................. 58 
2.12  AWK 时钟 ................................................................................................................. 58 
2.13  低功耗模式 ............................................................................................................ 58 
3  寄存器列表 ............................................................................................................ 59 
4  寄存器说明 ............................................................................................................ 60 
4.1  AHB 时钟分频寄存器(RCC_HCLKDIV) ..................................................................... 60 
4.2  APB 时钟分频寄存器(RCC_PCLKDIV)...................................................................... 60 
4.3  AHB 周边模块时钟使能寄存器(RCC_HCLKEN) ........................................................ 61 
4.4  APB 周边模块时钟使能寄存器(RCC_PCLKEN) ........................................................ 62 
4.5  时钟输出控制寄存器(RCC_MCOCR) ........................................................................ 64 
4.6  系统复位控制寄存器(RCC_RSTCR) ......................................................................... 65 
4.7  系统复位状态寄存器(RCC_RSTSR).......................................................................... 66 
4.8  系统时钟源配置寄存器(RCC_SYSCLKCR) ............................................................... 67 
4.9  系统时钟源选择寄存器(RCC_SYSCLKSEL) ............................................................. 68 
4.10  内部高速 RC 振荡器控制寄存器(RCC_HIRCCR) ................................................... 69 
4.11  外部高速晶体振荡器控制寄存器(RCC_HXTCR) .................................................... 70 
4.12  内部低速 RC 振荡器控制寄存器(RCC_LIRCCR) .................................................... 71 
4.13  外部低速晶体振荡器控制寄存器(RCC_LXTCR) ..................................................... 72 
4.14  Cortex M0+ IRQ 延时控制寄存器(RCC_IRQLATENCY)............................................ 73 
4.15  SysTick Timer 控制寄存器(RCC_STICKCR) ............................................................. 73 
4.16  SWDIO 端口控制寄存器(RCC_SWDIOCR) ............................................................... 74 
4.17  周边模块复位控制寄存器(RCC_PERIRST) ............................................................ 75 
4.18  RTC 复位控制寄存器(RCC_RTCRST) ...................................................................... 77 
4.19  寄存器写保护控制寄存器(RCC_UNLOCK) ............................................................ 77 
系统控制(SYSCON) ................................................................................... 78 
1  寄存器列表 ............................................................................................................ 78 
2  寄存器说明 ............................................................................................................ 79 
2.1  系统配置寄存器 0(SYSCON_CFGR0) ...................................................................... 79 
2.2  端子 Deep Sleep 中断模式控制寄存器(SYSCON_PORTINTCR) .............................. 80 
2.3  端子控制寄存器(SYSCON_PORTCR) ...................................................................... 81 
2.4  PCA 捕获通道控制寄存器(SYSCON_PCACR) .......................................................... 82 

目录    CX32L003 用户参考手册 
  Rev.1.0.2, 2019/11/29  5/472 
2.5  TIM1 通道输入源选择(SYSCON_TIM1CR) ............................................................... 83 
2.6  TIM2 通道输入源选择(SYSCON_TIM2CR) ............................................................... 85 
2.7  Syscon 寄存器写保护(SYSCON_UNLOCK) .............................................................. 86 
中断控制器(NVIC) ...................................................................................... 87 
1  概述 ....................................................................................................................... 87 
2  特征 ....................................................................................................................... 87 
3  中断优先级 ............................................................................................................ 87 
4  中断向量表 ............................................................................................................ 88 
5  中断唤醒控制 WIC ................................................................................................. 89 
5.1  NVIC 从深度休眠模式唤醒设置进入中断 ISR 设置 .................................................... 89 
5.2  NVIC 从深度休眠模式唤醒设置不执行中断 ISR 设置 ................................................. 89 
5.3  使用退出休眠特性 ..................................................................................................... 89 
6  软件基本操作 ......................................................................................................... 90 
6.1  外部中断使能 ............................................................................................................ 90 
6.2  NVIC 中断使能和清除使能 ........................................................................................ 90 
6.3  NVIC 中断挂起和清除挂起 ........................................................................................ 90 
6.4  NVIC 中断优先级 ...................................................................................................... 91 
6.5  NVIC 中断屏蔽 .......................................................................................................... 91 
7  寄存器列表 ............................................................................................................ 92 
8  寄存器说明 ............................................................................................................ 93 
8.1  中断使能设置寄存器(NVIC_ISER) ............................................................................ 93 
8.2  中断使能清除寄存器(NVIC_ICER) ............................................................................ 93 
8.3  中断挂起设置寄存器(NVIC_ISPR) ............................................................................ 94 
8.4  中断挂起清除寄存器(NVIC_ICPR) ............................................................................ 94 
8.5  中断优先级控制寄存器 0(NVIC_IPR0) ...................................................................... 95 
8.6  中断优先级控制寄存器 1(NVIC_IPR1) ...................................................................... 95 
8.7  中断优先级控制寄存器 2(NVIC_IPR2) ...................................................................... 96 
8.8  中断优先级控制寄存器 3(NVIC_IPR3) ...................................................................... 96 
8.9  中断优先级控制寄存器 4(NVIC_IPR4) ...................................................................... 97 
8.10  中断优先级控制寄存器 5(NVIC_IPR5) ................................................................... 97 
8.11  中断优先级控制寄存器 6(NVIC_IPR6) ................................................................... 98 
8.12  中断优先级控制寄存器 7(NVIC_IPR7) ................................................................... 98 
通用输入输出口(GPIO) .............................................................................. 99 
1  GPIO 简介 ............................................................................................................. 99 