C51: Support for the SST89C5X

QUESTION

Does the C51 compiler support the SST 89C5x parts? If so, is there a specific header file that I need to use?

ANSWER

Yes. C51 supports all 8051 derivatives, even the SST parts. The header file for this part is listed below.

/*--------------------------------------------------------------------------
REG89C5x.H
Header file for SST89C5x
Copyright (c) 1998 Keil Elektronik GmbH and Keil Software, Inc.
This file was derived from REG51.H
--------------------------------------------------------------------------*/
/* BYTE Registers */

sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr IE = 0xA8;
sfr IP = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr T2CON = 0xC8;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;

/* new SST89C5x SFR registers */

sfr WDTC = 0xC0;
sfr WDTD = 0x86;
sfr SFDT = 0xF8;
sfr SFAL = 0xF9;
sfr SFAH = 0xFA;
sfr SFCM = 0xFB;
sfr SFCF = 0xF7;

/* BIT Registers */
/* PSW */

sbit CY = 0xD7;
sbit AC = 0xD6;
sbit F0 = 0xD5;
sbit RS1 = 0xD4;
sbit RS0 = 0xD3;
sbit OV = 0xD2;
sbit F1 = 0xD1;
sbit PARITY = 0xD0;

/* TCON */

sbit TF1 = 0x8F;
sbit TR1 = 0x8E;
sbit TF0 = 0x8D;
sbit TR0 = 0x8C;
sbit IE1 = 0x8B;
sbit IT1 = 0x8A;
sbit IE0 = 0x89;
sbit IT0 = 0x88;

/* T2CON */

sbit TF2 = 0xCF;
sbit EXF2 = 0xCE;
sbit RCLK = 0xCD;
sbit TCLK = 0xCC;
sbit EXEN2 = 0xCB;
sbit TR2 = 0xCA;
sbit C_T2 = 0xC9;
sbit CP_RL2= 0xC8;

/* IE */

sbit EA = 0xAF;
sbit ET2 = 0xAD;
sbit ES = 0xAC;
sbit ET1 = 0xAB;
sbit EX1 = 0xAA;
sbit ET0 = 0xA9;
sbit EX0 = 0xA8;

/* IP */
sbit PT2 = 0xBD;
sbit PS = 0xBC;
sbit PT1 = 0xBB;
sbit PX1 = 0xBA;
sbit PT0 = 0xB9;
sbit PX0 = 0xB8;

/* P1 */
sbit T2EX = 0x91;
sbit T2 = 0x90;

/* P3 */
sbit RD = 0xB7;
sbit WR = 0xB6;
sbit T1 = 0xB5;
sbit T0 = 0xB4;
sbit INT1 = 0xB3;
sbit INT0 = 0xB2;
sbit TXD = 0xB1;
sbit RXD = 0xB0;

/* SCON */
sbit SM0 = 0x9F;
sbit SM1 = 0x9E;
sbit SM2 = 0x9D;
sbit REN = 0x9C;
sbit TB8 = 0x9B;
sbit RB8 = 0x9A;
sbit TI = 0x99;
sbit RI = 0x98;

SEE ALSO

• SST Devices - 8051 Family

Last Reviewed: Thursday, February 25, 2021