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附件有51單片機加上sl811讀寫U盤的源程序和原理圖
/*--------------------------------------------------------------------------
AT89X52.H
Header file for the low voltage Flash Atmel AT89C52 and AT89LV52.
Copyright (c) 1995-1996 Keil Software, Inc. All rights reserved.
--------------------------------------------------------------------------*/
#ifndef AT89X52_HEADER_FILE
#define AT89X52_HEADER_FILE 1
/*------------------------------------------------
Byte Registers
------------------------------------------------*/
sfr P0 = 0x80;
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 P1 = 0x90;
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr P2 = 0xA0;
sfr IE = 0xA8;
sfr P3 = 0xB0;
sfr IP = 0xB8;
sfr T2CON = 0xC8;
sfr T2MOD = 0xC9;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
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