1 1 2 2 3 3 4 4 DD CC BB AA Title NumberRevisionSize A4 Date 2017 2 9Sheet of File E QJ008 16S SchDocDrawn By C6 105 C7 105 C5 105 DM DP DACR DACL MRXD SPI DATA SPI CS SPI CLK NC MTXD VDD33 5V 解码芯片 BUSY 104 C9 DACL DACR R910K 5V 106 C3 R10 10K 105 C2 R11 10K ROUT LOUT EN BYPASS IN INVO1 VDD GND VO2 U2 LM4890 104 C8 5V R5 10K 105 C1 GND 功放电路 5V 1 DM 2 DP 3 GND 4 56 J1 5V DM DP R14 22R R16 22R USB参考电路 104 C4 D1 LED0 R12 1 5K BUSY 播放的时候为低电平 闲时为高电平 DACL 9 DACR 10 VDDIO 11 LDO5V 12 VSSIO 13 P23 24 14 P30 P25 15 P46 VPP 16 P01 1 P00 2 P02 VCOMO 4 P32 3 USBDM 5 USBDP 6 VCOM 7 DACVSS 8 U1 QJ008 SPI DATA SPI CLK CS 1 SO 2 WP 3 GND 4 SI 5 SCK 6 HOLD 7 VCC 8 U3 GD25QXX R13680R VDD33 SPI DATA SPI CS VDD33