RS232接口 1 6 2 7 3 8 4 9 5 5V 100UF + F U 1 F U +1 13 8 11 10 1 3 1uF R1 IN R2 IN T1 IN T2 IN C1 + C1 - 2 6 6 1 104P + V - V C C V R1 OUT R2 OUT T1 OUT T2 OUT C2 + C2 - RS232 D N G 5 1 12 9 14 7 4 5 1 2 3 4 a1 a2 a3 vcc wp scl gnd sda 24LC02 1uF 5V SCL 8 7 6 5 SDA T1 INT1 J2 5V 104P 1 2 3 4 5 6 7 8 9 1OE 1A0 2Y0 1A1 2Y1 1A2 2Y2 1A3 2Y3 10 GND VCC 2OE 1Y0 2A0 1Y1 2A1 1Y2 2A2 1Y3 2A3 20 19 18 17 16 15 14 13 12 11 74HC244 5V 100K C51初级学习板 5V 10K*8 +5V 40 J4 +5V 10U 10K 4 3 2 J1 A1 1 A2 A3 A4 A5 si so sck rst 5 6 7 8 9 IC4 p1.0 p1.1 p1.2 p1.3 p1.4 p1.5 p1.6 p1.7 rst SCL SDA 10 11 12 13 14 15 16 17 18 19 rxd p3.0 txd p3.1 INT0 P3.2 INT1 p3.3 T0 P3.4 T1 P3.5 P3.6 P3.7 XAL1 XAL2 20 20P GND AT89S51 SPEAKER Y2 Z H M 6 1 20P VCC P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 31 30 29 P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 L1 L2 L3 L4 L5 L6 L7 L8 +5V K8 K7 K6 K5 K4 K3 K2 K1 J3 5V 2K*8 6 L 7 L 8 L 2 1 1 1 0 1 9 8 7 a f g e d b c 1 s a f a g b f s1 e d c s2 2 s 3 s a f g e d b c a f g e d b c s4 b s3 4 s e d . c g 4位共阴数码管 1 2 3 4 5 6 1 L 2 L 3 L 4 L 5 L 1 D E L 2 D E L 3 D E L 4 D E L 5 D E L 6 D E L 10K A5 C8050 0 5 0 8 0 5 0 8 0 5 0 8 0 5 0 8 A4 A3 A2 A1 gnd vcc v1 rs r/w e d0 d1 d2 d3 d4 d5 d6 d7 b+ b- A 2 6 1 D C L 1K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 +5V P3.4 P3.6 P3.7 L1 L2 L3 L4 L5 L6 L7 L8 W 4 / 1 R 0 1 +5V 8 * K 0 1 5V 8 5 2 9 6 3 = x - + 7 4 1 0 t s r 10K 10K 下载线接口 (si) (rst) VCC 1 3 5 7 9 2 4 6 8 10 LE2 LE1 (so) (sck) 8 * K 0 1 10K 5V si +5V 100R/0.5W C8050 R E K A E P S J-USB 4 3 2 1 VCC D- D+ GND (rst) sck so J-POWER 9Vin IN4001 2 1 100K E1 220UF/16V 1 104P 3 LM7805 Vout Vin D N G 2 VCC S-POWER 10UF 104P 5V 1K POWER LED PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.cn