51单片机开发板最小系统原理图

R10
VDD C6
D
D1
P30 1 2 C10 3 VDD 4 P31 5 6 GND 7 VDD 8 9 10 11 12 R6 13 14 R5 P30
U2 TXD OSC2 DTR_N OSC1 RTS_N PLL_TEST VDD_232 GND_PLL RXD VDD_PLL RL_N LD_MODE GND TRI_STATE VDD GND DSR_N VDD DCD_N RESET CTS_N GND_3V3 SHTD_N VDD_3V3 EE_CLK DM EE_DATA DP PL2303 28 27 26 25 GND 24 23 22 21 GND 20 VDD 19 18 17 16 15
A
1
2
3
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Y2 C7 C8 GND R3 R4 GND VDD VDD C C9 C11
J7 4 3 2 1 S0 A0 S1 GND VDD VDD S17 VCC
VDD
GND C12
USB + R7 R8 J8 1 2 3 4 VCC S16 RST R1 R9 D2 D1 B
A
Title Size A4 Date: File: 7-Jul-2013 Sheet of F:\Design Explorer 99 SE\库\51小系统.ddb Drawn By: 4 Number Revision
1
2
3
4
VCC J2 GND VCC D W1 RS WR EN D0 D1 D2 D3 D4 D5 D6 D7 RD VCC S2 S3 VCC GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 12864 C A1 U1 S8 A2 S12 A3 A4 A5 A6 B A7 VCC C1 X2 C4 C5 C2 X1 P10 P11 P12 P13 P14 P15 P16 P17 Y1 J5 1 2 3 4 5 6 7 8 A0 1 2 A1 3 A2 A3 4 A4 5 A5 6 A6 7 A7 8 GND 9 GND 10 J4 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 1011 20 19 18 17 16 15 14 13 12 11 P30 P31 P32 P33 P34 P35 P36 P37 GND GND VCC 1 P00 2 P01 3 P02 4 P03 5 P04 6 P05 7 P06 8 P07 9 EA 10 S13 S14 S15 S9 S10 S11 P10 P11 P12 P13 P14 P15 P16 P17 RST P30 P31 P32 P33 P34 P35 P36 P37 X2 X1 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RST P3.0/RXD P3.1/TXD P3.2/INT0 P3.3/INT0 P3.4/T0 P3.5/T1 P3.6/WR P3.7/RD X2 X1 GND STC89C52 J3 J6 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 1011 20 19 18 17 16 15 14 13 12 11 VCC D0 D1 D2 D3 D4 D5 D6 D7 ALE PSEN P27 P26 P25 P24 P23 P22 P21 P20 1 2 3 4 5 6 7 8 9 10 C3 RST R2 VCC P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 EA ALE PSEN P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 VCC P00 P01 P02 P03 P04 P05 P06 P07 EA ALE PSEN P27 P26 P25 P24 RS P23 WR P22 EN P21 RD P20 J1 1 2 3 4 5 6 7 8 9 S4 S5 S6 S7