第2章 STC12C5A60S2的增强型8051内核VIP免费

1/23增强型8051单片机实用开发技术第2章STC12C5A60S2的增强型8051内核2.1STC12C5A60S2单片机的引脚MOSI/ADC5/P1.5P1.4/ADC4/CCP1/SSP5.3P5.2P5.1SS/P4.0SCLK/TxD2/CCP1/P4.3P4.7/RSTGNDWR/P3.6CLKOUT1/T1/P3.5CLKOUT0/T0/P3.4INT1/P3.3INT0/P3.2P5.0RD/P3.7TxD/P3.1RxD/P3.0XTAL2XTAL1NA/P4.4A08/P2.0A09/P2.1A11/P2.3A10/P2.2A12/P2.4P2.5/A13P2.6/A14EX_LVD/P4.6/RST2P4.1/ECI/MOSIP2.7/A15ALE/P4.5P0.7/AD7SCLK/ADC7/P1.7MISO/ADC6/P1.6P1.3/ADC3/CCP0/TxD2P1.2/ADC2/ECI/RxD2VccP4.2/CCP0/RxD2/MISOP1.1/ADC1P1.0/ADC0/CLKOUT2P0.0/AD0STC12C5A60S2243567891011121314151611817201922212423262528273029323147484546434441423940373836353433P0.6/AD6P0.1/AD1P0.5/AD5P0.3/AD3P0.2/AD2P0.4/AD4CLKOUT2/ADC0/P1.0ADC1/P1.1RxD2/EC1/ADC2/P1.2TxD2/CCP0/ADC3/P1.3SS/CCP1/ADC4/P1.4MOSI/ADC5/P1.5MISO/ADC6/P1.6SCLK/ADC7/P1.7P4.7/RSTRxD/P3.0TxD/P3.1INT0/P3.2INT1/P3.3CLKOUT0/T0/P3.4CLKOUT1/T1/P3.5WR/P3.6RD/P3.7XTAL1XTAL2GNDVccP0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7EX_LVD/P4.6/RST2ALE/P4.5NA/P4.4P2.7/A15P2.6/A14P2.5/A13P2.4/A12P2.3/A11P2.2/A10P2.1/A9P2.0/A812345678910111213141516171819204039383736353433323130292827262524232221LQFP48封装DIP40封装2/23增强型8051单片机实用开发技术逻辑符号图P1¿ÚSTC12C5A60S2P3¿ÚINT0/P3.2INT1/P3.3RXD/P3.0TXD/P3.1CLKOUT0/T0/P3.4CLKOUT1/T1/P3.5P2¿ÚXTAL1XTAL2P2.0/A8P2.1/A9P2.2/A10P2.3/A11P2.4/A12P2.5/A13P2.6/A14P2.7/A15P1.0/ADC0/CLKOUT2P1.1/ADC1P1.2/ADC2/ECI/RxD2P1.3/ADC3/CCP0/TxD2P1.4/ADC4/CCP1/SSP1.5/ADC5/MOSIP1.6/ADC6/MISOP1.7/ADC7/SCLKP0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7RSTGNDVccP0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0¿ÚWR/P3.6RD/P3.7P4¿ÚALE/P4.5NA/P4.4RST/P4.7EX_LVD/RST2/P4.6SCLK/TxD2/CCP1/P4.3MISO/RxD2/CCP0/P4.2MOSI/ECI/P4.1SS/P4.0P5.2P5.3P5.0P5.1P5¿Ú3/23增强型8051单片机实用开发技术上电复位电路STC12C5A60S2单片机内部集成MAX810专用复位电路，时钟频率在12MHZ以下时，复位脚可接1K电阻再接地，也可以使用如右图所示的复位电路。STC12C5A60S2RSTGNDCr10uFRr10K¦¸Vcc4/23增强型8051单片机实用开发技术常见的晶振连接方法晶体振荡器M的典型值是11.0592MHz，电容C1、C2的典型值是47Pf。XTAL2XTAL1C2C1GNDMSTC12C5A60S25/23增强型8051单片机实用开发技术2.2STC12C5A60S22.2STC12C5A60S2单片机的结构单片机的结构2.2.1STC12C5A60S22.2.1STC12C5A60S2单片机的内部结构单片机的内部结构RST¶¨Ê±ºÍ¿ØÖÆÂß¼­RAMµØÖ·¼Ä´æÆ÷RAMƬÄÚRCÕñµ´Æ÷µçÔ´¼à¿Ø(Éϵ縴λ¡¢µôµç¸´Î»)¿ÉÅäÖÃI/O¿ÚP0~P4¿ÉÅäÖÃI/O¿ÚP5³ÌÐòFLASH³ÌÐòµØÖ·¼Ä´æÆ÷»º³åÆ÷¶ÑÕ»Ö¸ÕëPCÔöÁ¿Æ÷PCDPTRÓ²¼þ¿´ÃŹ·(WDT)8ͨµÀ¸ßËÙA/DSPI2·PWM/PCA/CCU²¶»ñ/±È½Ïµ¥ÔªÖ¸Áî¼Ä´æÆ÷¿ÉÅäÖÃÕñµ´Æ÷ALUPSWÖжϡ¢UART¡¢¶¨Ê±Æ÷Âß¼­XTAL1XTAL2B¼Ä´æÆ÷ACCTMP2TMP11K×Ö½ÚEEPOMCPUʱÖÓALE6/23增强型8051单片机实用开发技术2.2.2CPU以8位算术/逻辑运算部件ALU为核心，加上通过内部总线而挂在其周围的暂存器TMP1，TMP2，累加器ACC，寄存器B，程序状态标志寄存器PSW以及布尔处理机就组成了整个运算器的逻辑电路。11．运算器．运算器单片机的中央处理器CPU由运算器和控制器组成。程序状态标志寄存器PSW:CY：进位标志位当执行加/减法指令时，如果操作结果的最高位D7出现进/借位，则CY置“1”，否则清零。此外，CPU在进行移位操作时也会影响这个标志位。AC：辅助进位标志位当执行加/减法指令时，如果低四位数向高四位数产生进/借位，则AC置“1”，否则清零。F0：用户标志0该位是由用户定义的一个状态标志。RS1，RS0：工作寄存器组选择控制位OV：溢出标志位指示运算过程中是否发生了溢出。F1：用户标志1...