PI 2 Design 502HTA, Hardware Reference Manual

Page: 11 / 31

PI2Media 502HTA
Hardware Reference Manual – P3 - 8/31/2017
PAGE 11
RPi
PIN DIR AF PUP/
PDN
502HTA
Name
Description/Notes
21 - - - GPIO9 Unused
22 - - - GPIO25 Unused
23 - - - GPIO11 Unused
24 - - - GPIO8 Unused
25 - - - GND
26 - - - GPIO1 Unused
27 - - - ID_SDA Unused
28 - - - ID_SCL Unused
29 OUT - PUP *MUTE GPIO5, 0 = Mute PCM5102A Output
30 - - - GND
31 OUT - PUP FILT GPIO6, 1 = Enable PCM5102A Filter
32 - - - GPIO12 Unused
33 OUT - - DEMP GPIO13, 1 = Enable De-Emphasis (44.1k only)
34 - - - GND
35 OUT Y - LRCLK I2S Left/Right Clock to PCM5102A
36 - - - GPIO16 Unused
37 - - - GPIO26 Unused
38 - - - GPIO20 Unused
39 - - - GND
40 OUT Y - SDOUT Pi I2S Serial Audio Data to PCM5102A
Table 3 – CPU GPIO Pin Assignments
5.1.1 RPI GPIO NOTES
1. DIR is from the point of view of the RPi.
2. Y in the Alternate Function (AF) column indicates that the use of this pin
requires the pin to be assigned to the function as defined by the RPi
specifications.
3. PUP/PDN indicates if the GPIO should have its associated Pullup (PUP)
or Pulldown (PDN) resistor enabled.
4. An asterisk ‘*’ at the beginning of the name indicates a low true signal.