2 3 4 5 6 A A REV V1.
1 2 3 4 5 6 500mA R1 CJ2305 VDD_5V/3.3B B 10k B A R33 Q1 A Q2 R34 10R 10k 10uF 10uF SPI_MOSI/3.1B SPI_SCLK/3.1B 10R 10R R3 R4 2N7002 R35 C1 C2 GPIO5/3.
1 2 3 4 5 6 A B GPIO17 SPI_MOSI/2.1C SPI_SCLK/2.1C GPIO5/2.1B GPIO13 I2S_LRCLK/4.
1 2 3 4 5 6 AVCC_3V3 MIC1 C16 C19 TP1 TP2 TP3 10k 1uF 7 11 1uF 1uF R11 VDD_3V3/3.5B I2C_SDA/3.5B I2C_SCL/3.5B 19 10 9 4 5 10k B R14 R15 R16 R17 MCLK I2S_CLK/3.3B I2S_LRCLK/3.1C I2S_ADC/3.