Difference between revisions of "ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/Audio"

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==Audio interface ==
 
==Audio interface ==
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore''
+
There is no directly available Audio interface on the Evaluation Kit, two SAI and one SPDIF full duplex interfaces are available on the expansion connector.
−
''Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console''
 
  
 
=== Description  ===
 
=== Description  ===
  
−
The Audio interface available on the Evaluation Kit at the connector ''TBD:Jxxx''.  
+
The SAI and SPDIF interfaces are available on the Evaluation Kit at the connector J8.  
  
−
''Jxx'' is a ''TBD:connector-type'' header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).
+
J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.
  
  
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===Signals ===
 
===Signals ===
  
−
The following table describes the interface signals:
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The following table describes the interfaces signals:
  
 
{| class="wikitable"  
 
{| class="wikitable"  
−
! latexfontsize="scriptsize"| Pin#
+
! latexfontsize="scriptsize" | Pin#
−
! latexfontsize="scriptsize"| SOM Pin#
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! latexfontsize="scriptsize" | SOM Pin#
−
! latexfontsize="scriptsize"| Pin name
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! latexfontsize="scriptsize" | Pin name
−
! latexfontsize="scriptsize"| Pin function
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! latexfontsize="scriptsize" | Pin function
−
! latexfontsize="scriptsize"| Pin Notes
+
! latexfontsize="scriptsize" | Pin Notes
 +
|-
 +
|8
 +
|J15.
 +
|SAI2_RXFS
 +
|
 +
|
 
|-
 
|-
−
|1,2,4,6,,7,8,10
+
|10
−
| -
+
|J15.
−
| N.A.
+
| SAI2_RXC
−
| N.C.
+
|
−
| Not connected
+
|  
 
|-
 
|-
−
| 3
+
|
−
| J1.189
+
|J15.
−
| RS232_RX
+
| SAI2_TXFS
−
| Receive line
+
|
 
|  
 
|  
 
|-
 
|-
−
| 3
+
|
−
| J1.187
+
|J15.
−
| RS232_TX
+
|SAI2_RXD0
−
| Transmit line
+
|
 
|  
 
|  
 
|-
 
|-
−
| 9
+
|
 +
|J15.
 +
|SAI2_TXC
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI2_TXD0
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI2_MCLK
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_MCLK
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXC
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXD0
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXD1
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXD2
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXD3
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SAI5_RXFS
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SPDIF_RX
 +
|
 +
|
 +
|-
 +
|
 +
|J15.
 +
|SPDIF_TX
 +
|
 +
|
 +
|-
 +
|2, 4
 
| -
 
| -
−
| DGND
+
|5V_VIN
−
| Ground
+
|Power output for transceiver supply
−
|  
+
|Always ON rail
 +
|-
 +
|1, 17
 +
| -
 +
|3V3_CB
 +
|Power output for transceiver supply
 +
|BOARD_PGOOD driven rail
 +
|-
 +
|6, 9, 14, 20,
 +
25, 30, 34, 39
 +
| -
 +
|DGND
 +
|Ground
 +
|
 
|}
 
|}
  

Revision as of 15:33, 16 September 2021

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History
Version Issue Date Notes
1.0.0 Sep 2021 First release


Audio interface[edit | edit source]

There is no directly available Audio interface on the Evaluation Kit, two SAI and one SPDIF full duplex interfaces are available on the expansion connector.

Description[edit | edit source]

The SAI and SPDIF interfaces are available on the Evaluation Kit at the connector J8.

J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.


[[File:{Template:Nome-som-EVB-Audio-connector.png|thumb|center|500px|Audio connector]]

Signals[edit | edit source]

The following table describes the interfaces signals:

Pin# SOM Pin# Pin name Pin function Pin Notes
8 J15. SAI2_RXFS
10 J15. SAI2_RXC
J15. SAI2_TXFS
J15. SAI2_RXD0
J15. SAI2_TXC
J15. SAI2_TXD0
J15. SAI2_MCLK
J15. SAI5_MCLK
J15. SAI5_RXC
J15. SAI5_RXD0
J15. SAI5_RXD1
J15. SAI5_RXD2
J15. SAI5_RXD3
J15. SAI5_RXFS
J15. SPDIF_RX
J15. SPDIF_TX
2, 4 - 5V_VIN Power output for transceiver supply Always ON rail
1, 17 - 3V3_CB Power output for transceiver supply BOARD_PGOOD driven rail
6, 9, 14, 20,

25, 30, 34, 39

- DGND Ground

Device mapping[edit | edit source]

UART3 is mapped to /dev/ttymxc2 device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.

Device usage[edit | edit source]

To connect to the debug serial port:

  1. connect the DB9 adapter bracket to the J22 connector on the SBCX board
  2. connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
  3. start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
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