頭文件AT89x051.H

/*------------------------------------------------
P3 Bit Registers (Mnemonics Ports)
------------------------------------------------*/
sbit P3_0 = 0xB0;
sbit P3_1 = 0xB1;
sbit P3_2 = 0xB2;
sbit P3_3 = 0xB3;
sbit P3_4 = 0xB4;
sbit P3_5 = 0xB5;
/* P3_6 Hardwired as AOUT */
sbit P3_7 = 0xB7;

sbit RXD = 0xB0; /* Serial data input */
sbit TXD = 0xB1; /* Serial data output */
sbit INT0 = 0xB2; /* External interrupt 0 */
sbit INT1 = 0xB3; /* External interrupt 1 */
sbit T0 = 0xB4; /* Timer 0 external input */
sbit T1 = 0xB5; /* Timer 1 external input */
sbit AOUT = 0xB6; /* Analog comparator output */

/*------------------------------------------------
IP Bit Registers
------------------------------------------------*/
sbit PX0 = 0xB8;
sbit PT0 = 0xB9;
sbit PX1 = 0xBA;
sbit PT1 = 0xBB;
sbit PS = 0xBC;

/*------------------------------------------------
PSW Bit Registers
------------------------------------------------*/
sbit P = 0xD0;
sbit FL = 0xD1;
sbit OV = 0xD2;
sbit RS0 = 0xD3;
sbit RS1 = 0xD4;
sbit F0 = 0xD5;
sbit AC = 0xD6;
sbit CY = 0xD7;

/*------------------------------------------------
Interrupt Vectors:
Interrupt Address = (Number * 8) + 3
------------------------------------------------*/
#define IE0_VECTOR 0 /* 0x03 External interrupt 0 */
#define TF0_VECTOR 1 /* 0x0B Timer 0 */
#define IE1_VECTOR 2 /* 0x13 External interrupt 1 */
#define TF1_VECTOR 3 /* 0x1B Timer 1 */
#define SIO_VECTOR 4 /* 0x23 Serial port */

/*------------------------------------------------
------------------------------------------------*/
#endif