1 3V3 D8 3V3 5V R1 NC R2 NC R3 1k R4 1K 5V 3V3 PWR LED C4 104 C5 104 C6 100UF GND GND GND GND NC IOREF NRST 3V3 5V GND GND VIN A0 A1 A2 A3 A4 A5 H2 8 7 6 5 4 3 2 1 1 2 3 4 5 6 H3 2 D15 D14 AVDD GND D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 TX RX 3 4 AMS1117 i V G o V 3 1 2 3V3 C1 104 1V8 C3 10UF C2 104 1 GND 2 A0 XRESET 3 4 GND A2 5 XDCS 6 GND 7 U1 1OE 1A 1Y 2OE 2A 2Y GND 74VHC125 VCC 4OE 4A 4Y 3OE 3A 3Y GND ICSP 1 3 5 2 4 6 MOSI_B GND MISO_B CLK_B J1 1 COM 2 3 A B A 1 COM 2 3 B (SCK_A) D13 CLK_B (MOSI_A) D11 MOSI_B GND CLK GND MOSI GND 1 2 3 4 5 6 7 (MISO_A) D12 MISO MISO_B A 1 COM 2 3 B J3 J2 3V3 GND A3 XCS GND D10 CS 14 13 12 11 10 9 8 U2 1OE 1A 1Y 2OE 2A 2Y GND 74VHC125 VCC 4OE 4A 4Y 3OE 3A 3Y 3V3 14 13 12 11 10 9 8 XCS VS_MISO MISO CS SD_MISO MISO A B C D GND GND AGND AGND 3.5mm_PJ-342 LINEIN RIGHT LEFT GBUF 1 3 6 5 2 4 CS MOSI CLK GND SD_MISO 1 2 3 4 5 6 7 8 TF D2 CD/D3 CMD VDD CLK VSS D0 D1 3V3 C30 104 GND 9 D9 CD R31 10K 3V3 D N G 0 1 GND 3V3 3V3 3V3 C27 1uF C29 1uF MICP MICN AGND C28 100pF R30 1k AGND C26 10UF R16 1K R22 1K R29 1k C24 10UF MIC 1 2 3 R17 4.7k R19 4.7k R23 4.7k D3 D6 D7 1 2 3 Multi-Function Buttons 6 5 4 R18 4.7k R20 4.7k 3V3 D5 D4 GND aveshareW Log 4 A B C I2S 6 5 4 3 2 1 LROUT MCLK SCLK SDATA MIDI GND 3V3 R5 10k C18 33pF C21 33pF 12.288M X1 GND U3 SO SI SCLK xCS xRESET DREQ xDCS/BSYNC TX RX XT1/MCLK XT2 VCO TEST VS_MISO MOSI CLK XCS XRESET 30 29 28 23 3 A1 (DREQ) 8 XDCS 13 27 26 18 17 15 32 MIDI R14 1M 3V3 GND D AGND R24 0R R21 10K R11 10k R12 10k R13 10k R25 10K R26 10K R27 10K R28 10K GPIO1 GPIO2 GPIO3 LROUT MCLK SCLK SDATA 33 34 9 10 36 25 11 12 35 GPIO0/SPIBOOT GPIO1 GPIO2/DCLK GPIO3/SDATA GPIO4/I2S_LROUT GPIO5/I2S_MCLK GPIO6/I2S_SCLK GPIO7/I2S_SDATA GND VS1053B GND VS1053B 1 IOVDD0 IOVDD1 IOVDD2 CVDD0 CVDD1 CVDD2 CVDD3 AVDD0 AVDD1 AVDD1 LEFT RIGHT GBUF MICP/LINE1 MICN LINE2 RCAP DGND0 DGND1 DGND2 DGND3 DGND4 AGND0 AGND1 AGND2 AGND3 6 14 19 5 7 24 31 38 43 45 46 39 42 1 2 48 44 4 16 20 21 22 37 40 41 47 H1 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 H4 3V3 1V8 3V3 LEFT RIGHT GBUF MICP MICN C23 1uF LINEIN C25 1uF GND AGND 2 C7 104 C8 104 C9 104 C10 104 C11 104 C12 104 C13 104 C14 104 C15 104 C16 104 R8 20R C17 10nF R9 20R R10 10R C19 10nF C20 47nF C22 100pF R33 1K AGND R15 1K C31 10UF AGND