Available GPIOs on coming RockPro64

[tllim]

Thank you for your answer,


However the RPi does not provide a standard pinning which includes I2S. The "standard" audio is managed as an "on board" PWM stream if I understand correctly. Some manufacturers provide audio card etensions. Wolfson (Cirrus Logic) provides a board with 1 stereo input stream and 1 output stereo stream. The HifiBerry has only 1 output stereo stream. My needs are 1 I2S input and at least 1 I2S output, but ideally I would like 4 I2S output (which is what you can get with the I2S #0 RK3399 interface).

Hope you can take into account these needs.
Thx

The RK3399 looks like a lot of pins but able assign for GPIO pins are not many. RK3399 don't have internal audio dac and the i2S0 has been assigned fro on board audio codec. I will take your request into account but not promise able to accommodate.

Thank you for your answer.
What's doable is to use I2S #1 interface for onboard audio codec (I2S #1 has "only" 1 IN and 1 OUT), and to allow access to the more featured I2S #0 thru the GPIO connectors. This is what Firefly is doing with their RK3399 boards.
Thx

We will expose all four I2S0 data 0-3 pins with clock pins on Rockpro64's Pi2 bus.

Just to be clear. Here are the GPIOs for I2S0:

• Y7   : GPIO3_D3/I2S0_SDI0
  
• AA6 : GPIO3_D5/I2S0_SDI2SDO2
  
• AG3 : GPIO3_D0/I2S0_SCLK
  
• AH1 : GPIO3_D7/I2S0_SDO0
  
• AE5 : GPIO3_D4/I2S0_SDI1SDO3
  
• AF4 : GPIO3_D1/I2S0_LRCK_RX
  
• AH2 : GPIO3_D6/I2S0_SDI3SDO1
  
• AJ2  : GPIO3_D2/I2S0_LRCK_TX
  

Do you mean you will expose those 8 signals? If yes that would be perfect   

Thx

Correct.