Schematic drawing for the nRF5340 Audio DK codec. Figure 1. nRF5340 Audio DK codec 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 D D C C B B A A Size PCB Assembly Number Date: File: Sheet of Drawn By: Revision nRF5340 Audio Development Board - HW codec 1.0.0 16.02.2022 pca10121_hw_codec.SchDoc 4 18 RUBR PCA10121 A3 Title Classification: PUBLIC SCL SDA I2C HW_CODEC_AUX_I2C MISO MOSI SCK CS SPI I2S SPI CTRL HW_CODEC HW_CODEC_IF SPI1_SS H8 ASP2_FSYNC/GPIO8 K6 MICBIAS1B B6 MICBIAS1A D6 SPI2_MISO/I2C2_SCL/GPIO11 J1 IN1RN B4 OUTP A9 MICBIAS1C A7 OUTN B8 IN2LN D2 IN2RN A3 IN1LP_1 D4 IN2_PDMDATA A1 SPI1_SCK H10 SPI1_MISO/I2C1_SCL G11 ASP2_DOUT/GPIO5 J5 IRQ F10 SPI2_MOSI/I2C2_SDA/GPIO12 H4 ASP2_BCLK/GPIO7 K2 MCLK2 L5 ASP1_DOUT/GPIO1 J7 MCLK1 L9 ASP1_DIN/GPIO2 J9 ASP1_BCLK/GPIO3 K10 IN1LN_2 E3 IN2LP C3 IN1LN_1 C5 IN1_PDMDATA E1 SPI2_SCK/GPIO10 H2 SPI2_SS/GPIO9 G3 IN1_PDMCLK F4 ASP2_DIN/GPIO6 J3 IN2_PDMCLK C1 ASP1_FSYNC/GPIO4 J11 IN2RP B2 IN1RP A5 IN1LP_2 E5 RESET F8 SPI1_MOSI/I2C1_SDA G9 U2A CS47L63 VREF2_FILT C11 NC E11 GND_A B10 GND_D F2 VDD_A A11 VDD_D G1 NC L1 NC H6 GND_D K8 VDD_D L7 NC L11 VDD_IO L3 LDO_FILT C7 GND_A C9 VDD_LDO D10 GND_D K4 VREF1_FILT D8 GND_SUB E7 NC E9 NC F6 NC G5 NC G7 U2B CS47L63 C30 1.0 µ F C29 1.0 µ F C32 1.0 µ F C33 100nF C28 2.2 µ F C31 10 µ F BCLK DIN DOUT FSYNC MCLK I2S GPIO IRQ RESET CTRL C22 100nF R7 22R C24 1.0 µ F C25 1.0 µ F C27 1.8nF C26 1.8nF HW_CODEC_PDM1 HW_CODEC_PDM2 R8 100R R10 100R R12 100k R11 100k HW_CODEC_AUX_I2S HW_CODEC_LED VDD_HW_CODEC_1V2 VDD_HW_CODEC_1V8 BCLK DIN DOUT FSYNC MCLK I2S CLOCK DATA POWER PDM CLOCK DATA POWER PDM SB11 TP48 LEFT RIGHT GND LINE R6 22R C23 100nF SB10 SB9 OUTP OUTN HEADPHONE TP41 TP42 TP43 TP44 TP46 TP47 TP49 TP50 TP51 TP52 TP45 SB15 SB16 VDD_HW_CODEC_1V2 VDD_HW_CODEC_1V8 R9 100k VDD_HW_CODEC_1V8 TP7 TP1 TP2 TP3 TP4 TP5 TP6 TP54 TP55 TP53 SB12 SB13 SB14 TP8 HEADPHONE LINE_IN