Tone Board SPDIF PIN

No6: 40-Pin Header Pinout (J1)

Signal Pin Pin Signal
5V_1 1 21 GND5
5V_2 2 22 OLED_SCL
VIM_DN 3 23 OLED_SDA
VIM_DP 4 24 GND6
GND 5 25 -
- 6 26 -
- 7 27 VCC_3V3
- 8 28 GND7
GND 9 29 I2S_SCLK
ADC0 10 30 I2S_MCLK
- 11 31 I2S_SDO
- 12 32 I2S_LRCK
VIM_SPDIF 13 33 I2S_SDI
GND3 14 34 GND8
UART_RX_AO_B/SPDIF_MODE gpio506 15 35 OLED_PWREN
UART_TX_AO_B/SPDIF_IN_MODE gpio505 16 36 -
GND4 17 37 OLED_RST
Linux_RX 18 38 -
Linux_TX 19 39 MUTE
VCC_3V3 20 40 GND9

i will try to check it soon