Nghiên cứu ic at89c52 và ứng dụng vào mạch chạy chữ dùng led ma trận 8x8 kèm file mô phỏng layout
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1.8.1Các thanh ghi có địa chỉ 80H, 90H, A0H, B0H: 9
1.8.2Thanh ghi A 9
1.8.3.Thanh ghi B 9
1.8.4. Con trỏ sắp xếp SP :địa chỉ 81H 10
1.8.5 Con trỏ dữ liệu DPTR 10
1.8.6.Thanh ghi trạng thái chương trình PSW (địa chỉ byte D0H) 10
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2.1.1 Cấu tạo 12
2.1.2 Cơ sở lý thuyết 12
2.1.3 Nguyên lý hoạt động 12
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1.8.1Các thanh ghi có địa chỉ 80H, 90H, A0H, B0H:
$pFI%4,4*+>'+(+595:/*<>H%65789+5:'/s4I?(544_>4,4#?<*)4\*+:*<8F
8N*H%,4ICD4,4*+>'+(+5'%FHW56c>4+`UF*h+?n4*d'<5d'(IG'I;b*I%#0)#-)#)
#•*;Z'(s'(HW54,4#?<*8N*!+q'(+A'6:*N*4O4,44+p'4_>#?<*0Id'/s4I?(54
-)4G'I%/4+?4,4U5*4_>*+>'+(+54\6c>4+`0Id'/s4-!
1.8.2Thanh ghi A
+>'+(+5I%*+>'+(+5L8>'*<3'()f['(6:I;8*<j4,4*?,'+A'(H%9J*L8O
4_>D+ˆD*X'+!
+>'+(+54\6Sf%5U5*V)4\6c>4+`I%0!
1.8.3.Thanh ghi B
+>'+(+5z€6c>4+`‡0)6;b4f['(HW5*+>'+(+56:*+Q4+5E'4,4D+ˆD
*?,'VK+34!w+5*+Q4+5E'IE'+4+5>HW5*+>'+(+5)VKf;6;b4I;8*<j€*+>'+(+5z!
(?%5<>*+>'+(+5z4r'6;b4f['('+;/S**+>'+(+56E/4\'+5784+s4'.'(!
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1.8.4. Con trỏ sắp xếp SP :địa chỉ 81H
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*.'()(5O/*Q6S'(9+5*+Q4+5E'4,4IE'+# ))##4?'*<t #f['(L8O'IX
H%gIX4,4'+\/fjI5E8I5d'*^4!5,*<c/n46c'+4_> #I%0ƒ!
1.8.5 Con trỏ dữ liệu DPTR
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*+%'+*„+>5*+>'+(+5#~UF*h*+ND…6c>4+`UF*h•H%#~UF*h4>?…6c>4+`UF*h
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fjI5E8#*+;@'(6;b4Vgf^'(9+5*<8F8N*fjI5E8*„US'+W+?n4US'+W
*„Ud''(?%5
1.8.6.Thanh ghi trạng thái chương trình PSW (địa chỉ byte D0H)
5B!#*+*0.^I!)!#FY!#S(FFC!#F.'!.Ff!#F.E(yjz
Cờ nhớ C
@6;b4Vgf^'(*<?'(4,4IE'+*?,'+34
•-'J8D+ˆD*?,'4S'(OF<>*<%'+?n4D+ˆD*<„4\/;b'
•0'J8D+ˆD*?,'4S'(9+2'(*<%'+?n4D+ˆD*<„9+2'(4\/;b'!
Cờ nhớ phụ AC:
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w+54S'(VKz
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J89J*L8OyU5*f;W50*+a•0!
Cờ 0 hay cờ nhớ Z:
@••09+5*+>'+(+54\(5,*<c9+,40
@••-9+5*+>'+(+54\(5,*<cI%0
Các bit chọn bank thanh ghi:
>5U5* -H% f['(6:,4ICDU>'9*+>'+(+56;b4Vgf^'()/n46c'+ -•0
H% •0
;8+%'+<8'(=>5$.'(<8'( -0
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Cờ tràn OV
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