1

free Pins GPIO - Amp for Ver. A+/B+

Luxxxy

December 21, 2014 21:27

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hello,

remains there any free gpio port once the amp installed?
which pins can be used?

thank you

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6 comments

• 0
  
  HiFiBerry team December 22, 2014 05:59

  Dear Robert,
  
  it depends what you mean with "free". The connector blocks all GPIO pins. However not all pins are used. You can see which pins are in use here:
  http://www.hifiberry.com/guides/gpio-usage-of-the-hifiberry-products/
  
  Best regards
  Daniel
• 0
  
  Luxxxy December 22, 2014 09:07

  GPIO2-3 are used by our products for configuration. If you are experienced with I2C, you might add other slave devices, if you a a novice, we don’t recommend this at all.
  GPIOs 28-31 are used for the sound interface. You can’t use them for any other purpose.
  
  GPIO = PIN number?
  
  
• 0
  
  HiFiBerry team December 22, 2014 16:11

  No, the GPIOs are NOT the pin numbers, but the GPIO numbers. You see these numbers on your picture in the text, e.g. pin 40 is GPIO21.
  
  Best regards
  Daniel
• 0
  
  Luxxxy December 22, 2014 20:55

  ok i understand
  
  thanks
  
  HiFiBerry DAC+, Digi+ and Amp+
  
  GPIO2-3 are used by our products for configuration. If you are experienced with I2C, you might add other slave devices, if you a a novice, we don’t recommend this at all.
  GPIOs 18-21 are used for the sound interface. You can’t use them for any other purpose.
  
  
• 0
  
  HiFiBerry team December 23, 2014 06:20

  That's correct. Note that also pin 27 and 28 are always reserved (and also used at our DAC+ and Digi+ boards). Even with a board that does not use them, they should not be used for anything.
  
  Best regards
  Daniel
• 0
  
  Nicolas Marcq September 22, 2017 09:30

  Hi, the link is down.

  Where is the doc about used GPIO port?

   

  Thanks a lot !