单片机中，各个sfr是在一块连续的内存中吗？

Question

如题所述

Answer 1

有的是，有的不是，下面是51的各个特殊功能寄存器的地址
sfr P0 = 0x80;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr SPSTAT = 0x84;
sfr SPCTL = 0x85;
sfr SPDAT = 0x86;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr AUXR = 0x8E;//-,-,-,-,-,-,EXTRAM,ALEOFF
sfr P1 = 0x90;
sfr P1M0 = 0x91;
sfr P1M1 = 0x92;
sfr P0M0 = 0x93;
sfr P0M1 = 0x94;
sfr P2M0 = 0x95;
sfr P2M1 = 0x96;
sfr P1_ADC_EN = 0x97;//允许P1口成为AD(ADCP17--ADCP10)为1表示AD
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr P2 = 0xA0;
sfr AUXR1 = 0xA2;//.0 DPS means dptr select
sfr IE = 0xA8;
sfr SADDR = 0xA9;
sfr P3 = 0xB0;
sfr P3M0 = 0xB1;
sfr P3M1 = 0xB2;
sfr IPH = 0xB7;//IP's High 和IP的对应位组成4中优先级
sfr IP = 0xB8;
sfr SADEN = 0xB9;
sfr ADC_LOW2 = 0xBE;//ADC结果寄存器
/* 8052 Extensions */
sfr XICON = 0xC0;//PX3,EX3,IE3,IT3,PX2,EX2,IE2,IT2
sfr ADC_CONTR = 0xC5;//AD控制寄存器-,-,-,ADC_FLAG,ADC_START,CHS2,CHS1,CHS0
sfr ADC_DATA = 0xC6;//ADC结果寄存器
sfr CLK_DIV = 0xC7;
sfr T2CON = 0xC8;
sfr T2MOD = 0xC9;//-,-,-,-,-,-,T20E,DCEN
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
sfr PSW = 0xD0;
sfr CCON = 0xD8;
sfr CMOD = 0xD9;
sfr CCAPM0 = 0xDA;
sfr CCAPM1 = 0xDB;
sfr CCAPM2 = 0xDC;
sfr CCAPM3 = 0xDD;

sfr ACC = 0xE0;
sfr WDT_CON = 0xE1;//-,-,EN_WDT,CLR_WDT,IDLE_WDT,PS2,PS1,PS0
sfr ISP_DATA = 0xE2;
sfr ISP_ADDRH = 0xE3;
sfr ISP_ADDRL = 0xE4;
sfr ISP_CMD = 0xE5;
sfr ISP_TRIG = 0xE6;
sfr ISP_CONTR = 0xE7;
sfr P4 = 0xE8;//4Bit端口
sfr CL = 0xE9;//PCA TIME LOW
sfr CCAP0L = 0xEA;//PCA
sfr CCAP1L = 0xEB;
sfr CCAP2L = 0xEC;
sfr CCAP3L = 0xED;
sfr B = 0xF0;
sfr PCA_PWM0 = 0xF2;
sfr PCA_PWM1 = 0xF3;
sfr PCA_PWM2 = 0xF4;
sfr PCA_PWM3 = 0xF5;
sfr CH = 0xF9;//PCA TIME HIGH
sfr CCAP0H = 0xFA;//PCA
sfr CCAP1H = 0xFB;//PCA
sfr CCAP2H = 0xFC;//PCA
sfr CCAP3H = 0xFD;//PCA