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5¡¢ ¿Õ 6¡¢ P1.2
7¡¢ ¿Õ 8¡¢ P1.3
9¡¢ P3.3(INT1) 10¡¢ P1.4
11¡¢ P3.4(T0) 12¡¢ P1.5
13¡¢ P3.1(TXD) 14¡¢ P1.6
15¡¢ P3.0(RXD) 16¡¢ P1.7
2.2 CON2ΪÍâ½Ó¼üÅÌ/ÏÔʾ½Ó¿Ú
1¡¢ GND 2¡¢ VCC
3¡¢ VCC 4¡¢ GND
5¡¢ P3_5 6¡¢ P3_2
7¡¢ RD 8¡¢ WR
9¡¢ D0 10¡¢ D1
11¡¢ D2 12¡¢ D3
13¡¢ D4 14¡¢ D5
15¡¢ D6 16¡¢ D7
17¡¢ VCC 18¡¢ Reset
19¡¢ VCC 20¡¢ GND
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3¡¢ PB0 4¡¢ PB1
5¡¢ PB2 6¡¢ PB3
7¡¢ PB4 8¡¢ PB5
9¡¢ PB6 10¡¢PB7
11¡¢PC0 12¡¢PC1
13¡¢PC2 14¡¢PC3
15¡¢PC4 16¡¢PC5
17¡¢PC6 18¡¢PC7
19¡¢PA0 20¡¢PA1
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3¡¢ VCC 4¡¢ GND //µçÔ´Ïß
5¡¢ D7 6¡¢ D6
7¡¢ D5 8¡¢ D4 //Êý¾ÝÏß
9¡¢ D3 10¡¢ D2
11¡¢ D1 12¡¢ D0
13¡¢ WR 14¡¢ RD
15¡¢ CS4 16¡¢ CS5 //¿ØÖÆÏß
17¡¢ CS6 18¡¢ ¿Õ
19¡¢ A0 20¡¢ A1
21¡¢ A2 22¡¢ A3 //µØÖ·Ïß
23¡¢ A4 24¡¢ A5
25¡¢ A6 26¡¢ A7
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9¡¢ WR 10¡¢RD
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13¡¢ CS2 14¡¢CS3
15¡¢ D0 16¡¢D1
17¡¢ D2 18¡¢D3
19¡¢ D4 20¡¢D5
23¡¢ VCC 24¡¢GND
25¡¢ VCC 26¡¢GND
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MOV A£¬#80H
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MOV DPTR,#8800H ; A¿ÚµØÖ·
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MOVX @DPTR,A ;ÔÚA¿ÚÉÏΪ01010101µçƽ
INC DPTR ;B¿ÚµØÖ·
MOVX @DPTR,A ;ÔÚB¿ÚÉÏΪ01010101µçƽ
INC DPTR ;C¿ÚµØÖ·
MOVX @DPTR,A ;ÔÚC¿ÚÉÏΪ01010101µçƽ
SJMP $
END
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INC DPTR ;DS12C887µÄA¼Ä´æÆ÷
MOV A,#08H
MOVX @DPTR,A ;Éè Ê®½øÖÆBCDÂë,24СʱÖÆ,²»¶¨Ê±
MOV DPTR,#800DH ;DS12C887µÄA¼Ä´æÆ÷
MOVX A,@DPTR ;Èç¹ûD¼Ä´æÆ÷µÚ7λΪ0,±íʾµç³ØºÄ¾¡
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MOV DPTR,#8000H ;DS12C887Ãëµ¥Ôª
MOV A,#00H
MOVX @DPTR,A ;дÈëÃë
MOV DPTR,#8002H ;DS12C887·Öµ¥Ôª
MOV A,#00H
MOVX @DPTR,A ;дÈë·Ö
MOV DPTR,#8004H ;DS12C887ʱµ¥Ôª
MOV A,#00H
MOVX @DPTR,A ;дÈëʱ
MOV DPTR,#8006H ;DS12C887ÐÇÆÚµ¥Ôª
MOV A,#01H
MOVX @DPTR,A ;дÈëÐÇÆÚ
MOV DPTR,#8007H ;DS12C887ÈÕµ¥Ôª
MOV A,#01H
MOVX @DPTR,A ;дÈëÈÕ
MOV DPTR,#8008H ;DS12C887Ôµ¥Ôª;
MOV A,#04H
MOVX @DPTR,A ;дÈëÔÂ
MOV DPTR,#8009H ;DS12C887Äêµ¥Ôª;
MOV A,#02H
MOVX @DPTR,A ;дÈëÄêʱ¼ä
ERROR: RET
END
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MOV A£¬#30H ;·¢Êý¾Ý30H-39H(0-9µÄASCIIÂë)µ½PC»ú
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INC A
CJNE A,#3AH,LP1
RET
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MOV SCON£¬#50H
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LP1: MOV SBUF£¬A
JNB TI£¬$
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INC A
CJNE A,#3AH,LP1
RET
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