【正文】 MOV R1,40H MOV R1,A INC 40H AJMP LOOP4LOOP3: INC R3 MOV R1,60H MOV R1,A INC 60HLOOP4: INC R0 DJNZ R4,LOOP1 MOV 40H,R2 MOV 60H,R3 END BUF EQU 10H ORG 0000H AJMP START ORG 0030HSTART: MOV A,38H ADD A,2AH CLR C SUBB A,19H MOV BUF,A END DATA1 EQU 30H DATA2 EQU 50H ORG 0000H SJMP START ORG 0030HSTART: MOV R0,DATA1 MOV R1,DATA2 MOV R2,14HLOOP: MOV A,R1 XCH A,R0 XCH A,R1 INC R0 INC R1 DJNZ R2,LOOP END ORG 0000H AJMP START ORG 0030HSTART: MOV A,6 MOV DPTR,TAB DEC A RL A MOV B,A MOVC A,A+DPTR MOV R6,A MOV A,B INC A MOVC A,A+DPTR MOV R7,A ORG 1000HTAB: DW 1,4,9,16,25,36,49,64,81,100 DW 121,144,169,196,225,256,289,324,400 END ORG 0000H AJMP START ORG 0030HSTART: MOV A,04H MOV DPTR,TAB MOVC A,A+DPTR ORG 0100HTAB: DB 40H,79H,24H,30H,19H,12H,02H,78H,00H,1BH END ORG 0000H AJMP START ORG 0030HSTART: MOV R0,20H MOV R1,40H MOV R2,00HLOOP1: MOV A,R0 CJNE A,0DH,LOOP2 SJMP EDLOOP2: CJNE A,43H,LOOP3 INC R2LOOP3: INC R0 AJMP LOOP1ED: MOV A,R2 MOVX R1,A END ORG 0000H SJMP START ORG 0030HSTART: MOV A,R3 RL A MOV DPTR,JMPTAB JMP A+DPTRJMPTAB:AJMP M00 AJMP M01 AJMP M02 ...... AJMP M7F END ORG 0000H SJMP START ORG 0030HSTART: MOV R0,30H MOV R7,0FH CLR F0LOOP: MOV A,R0 MOV 10H,A INC R0 MOV 11H,R0 CLR C SUBB A,R0 JZ NEXT JC NEXT MOV R0,10H DEC R0 MOV R0,11H INC R0 SETB F0NEXT: DJNZ R7,LOOP JB F0,START END習(xí)題五一、 單項(xiàng)選擇題1. B2. C3. C4. C5. C6. A7. C8. A9. A10. C二、 填空題1. 22. 0CH3. 電平觸發(fā)、脈沖觸發(fā)4. 125. TL06. TF17. SCON8. 停止位9． 自動(dòng)重裝入初值8位定時(shí)器/計(jì)數(shù)器10. 方式1三、簡答題 1. P0口有一個(gè)輸出鎖存器，兩個(gè)三態(tài)輸入緩沖器。我們把引起中斷的原因，或者能夠發(fā)出中斷請求信號(hào)的來源統(tǒng)稱為中斷源。 5. TCON、SCON、IE、IP。M1M0=10，工作方式2,2個(gè)獨(dú)立8位計(jì)數(shù)器。四、應(yīng)用編程題 1. ORG 0000H LJMP MAIN ORG 0003H LJMP INT01 ORG 000BH LJMP INT ORG 0030H MAIN: MOV R0,20 MOV SP,50H MOV TMOD,01H MOV TH0,3CH MOV TL0,0B0H SETB EA SETB EX0 SETB IT0 SJMP $ INT01: SETB ET0 SETB TR0 CLR RETI INT: MOV TH0,3CH MOV TL0,0B0H DJNZ R0,DE DE0: SETB CLR ET0 CLR TR0 MOV R0,20 DE: RETI END 2. (1) 1FH,08H (2) ORG 0000H LJMP MAIN ORG 000BH LJMP INT ORG 0030H MAIN: MOV TMOD,00H MOV SP,50H MOV TH1,1FH MOV TL1,08H SETB EA SETB ET0 SETB TR0 SJMP $ INT: MOV TH1,1FH MOV TL1,08H CPL RETI END 3. ORG 0000H LJMP MAIN ORG 0030H MAIN: MOV TMOD,90H MOV TL1,00H MOV TH1,00H MOV R0,50H JB ,$ SETB TR1 JNB ,$ JB ,$ CLR TR1 MOV R0,TL1 INC R0 MOV R0,TH1 SJMP $ END 4. ORG 0000H LJMP MAIN ORG 000BH LJMP INT ORG 001BH LJMP INT11 ORG 0030H MAIN: MOV TMOD,03H MOV TH1,0C8H MOV TL1,64H MOV SP,50H SETB EA SETB ET0 SETB TR0SETB TR1 SJMP $ INT: MOV TL1,64H CPL RETI INT11: MOV TH1,0C8H CPL RETI END 5. ORG 0000H LJMP MAIN ORG 0030H MAIN: MOV R0,50H MOV R1,01H MOV R7,10H MOV TMOD,20H MOV TH1,0FEH MOV TL1,0FEH SETB TR1 CLR ES MOV SCON,40H MOV PCON,00H LOOP: MOV A,R1 MOV R0,A MOV SBUF,A WAIT: JBC TI,CONT SJMP WAIT CONT: INC R0 INC R1 DJNZ R7,LOOP END習(xí)題六一、 單項(xiàng)選擇題1. B2. C3. B4. D5. A二、 填空題1. 程序存儲(chǔ)器，數(shù)據(jù)存儲(chǔ)器，642.3. ,4. MOVX A ,Ri、MOVX A ,DPTR5. MOVC A ,A+PC、MOVC A ,A+ DPTR6. R0，R1，DPTR7. 接地8. 線選法、譯碼法三、 簡答題1. 對于無片內(nèi)ROM型單片機(jī)或片內(nèi)程序存儲(chǔ)器不夠用的情況，需要擴(kuò)展片外程序存儲(chǔ)器。若低優(yōu)先級(jí)按鍵一直閉合，優(yōu)先級(jí)高的按鍵按下不會(huì)出現(xiàn)優(yōu)先級(jí)高的按鍵控制的燈亮，保持原樣。4. 主片IR0，主片IR1，從片IR0，從片IR1，從片IR2，從片IR3，從片IR4，從片IR5，從片IR6，從片IR7，主片IR3，主片IR4，主片IR5，主片IR6，主片IR7。作用是啟動(dòng)、控制定時(shí)/計(jì)數(shù)信號(hào)。異步通信和同步通信的比較（1）異步通信簡單，雙方時(shí)鐘可允許一定誤差。3. 接收時(shí)鐘/發(fā)送時(shí)鐘頻率是波特率的132或64倍。這樣，MCU在輸出1位SCK時(shí)鐘的同時(shí)，將使接口芯片串行左移，（模擬MCU的MISO線），（模擬MCU的MOSI線）輸出1位數(shù)據(jù)（先為高位）至串行接口芯片。2. 10000000B3. 為了確保單片機(jī)對一次按鍵動(dòng)作只確認(rèn)一次按鍵有效，利用延時(shí)越過抖動(dòng)期，即在第一次檢測到有按鍵按下時(shí)，該鍵所對應(yīng)的行線為低電平，執(zhí)行一段延時(shí)10ms的子程序后，再次檢測到該行仍為低電平，則確認(rèn)該行確實(shí)有按鍵按下，通過延時(shí)程序消除按鍵按下時(shí)所產(chǎn)生的抖動(dòng)。2． 在D/A轉(zhuǎn)換器的輸出端加一個(gè)IV轉(zhuǎn)換電路，將電流輸出轉(zhuǎn)換為電壓輸出。2. XBYTE[0x007f] XBYTE[0x007c] XBYTE[0x007d]3. 將ADC0809的8個(gè)引腳IN0~IN7上的模擬量信號(hào)按順序轉(zhuǎn)換為