51单片机做的MP3电路图及PCB1 2 3 4 5 6 VDD VDD C26 100nF GND C27 100nF VDD GND ARST DD7 DD6 DD5 DD4 DD3 DD2 DD1 DD0 GND VDD nWR nRD VDD INTQ A1 A0 nCS0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 C28 100nF JP1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 GND GND DD8 DD9 DD10 DD11 DD12 DD13 DD14 DD15 VDD C32 100nF GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 U3 R18 R19 R20 R21 R22 R23 R24 R25 16 15 14 13 12 11 10 TX D 9 RX D C13 VDD 2.2uF GND NC NC NC NC NC GND R/nB nRE nCE NC NC VCC VSS NC NC CLE ALE nWE nWP NC NC NC NC NC K9F5608 VDD C29 100nF GND U4 DD3 DD4 DD5 DD6 DD7 SnCS DD10 nRD DD11 DD9 DD8 DD13 nWR VDD LV R 15 16 17 18 19 20 21 22 23 24 25 26 27 28 I/O4 I/O5 I/O6 I/O7 I/O8 nCS A10 nOE A11 A9 A8 A……