PI2Media 502HTA
Hardware Reference Manual – P3 - 8/31/2017
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Table of Contents
1 Warranty ......................................................................................................................................................................................... 3
2 Operating Specifications ................................................................................................................................................................. 4
3 Overview ........................................................................................................................................................................................ 5
4 On-Board Functions ........................................................................................................................................................................ 7
4.2.1 PCM5102A 24-Bit 192Khz DAC Notes ............................................................................................................................. 7
4.3.1 Dual Triode Amplifer Notes .............................................................................................................................................. 8
4.4.1 Class-A MOSFET Buffer Notes ....................................................................................................................................... 8
4.5.1 6.3V Heater Supply Notes ................................................................................................................................................ 9
5 RPi GPIO ...................................................................................................................................................................................... 10
5.1.1 RPi GPIO Notes ............................................................................................................................................................. 11
6 502HTA Power ............................................................................................................................................................................. 12
7 502HTA Software ......................................................................................................................................................................... 14
8 Connectors and Switches ............................................................................................................................................................. 15
9 Test Results.................................................................................................................................................................................. 17
10 Document Revisions ................................................................................................................................................................... 30
11 Errata.......................................................................................................................................................................................... 31
List of Tables
Table 1 – 502HTA Operating Specifications ...................................................................................................................................... 4
Table 2 – RPi to PCM5102A Connections ......................................................................................................................................... 7
Table 3 – CPU GPIO Pin Assignments ............................................................................................................................................ 11
Table 4 – Document Revisions ........................................................................................................................................................ 30
List of Figures
Figure 1 – 502HTA Block Diagram..................................................................................................................................................... 6
Figure 2 – 502HTA Power Hold Circuit ............................................................................................................................................ 13
Figure 3 – 502HTA Connectors and Switches .................................................................................................................................. 15
Figure 4 – 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, 0dB, 600 ohm ...................................................................................... 18
Figure 5 – 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -3dB, 600 ohm ..................................................................................... 19
Figure 6 – 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -12dB, 600 ohm ................................................................................... 20
Figure 7 – 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -60dB, 600 ohm ................................................................................... 21
Figure 8 – 502HTA Headphone Out, 11.025Khz, [email protected], Jitter Test, 600 ohm ................................................................. 22
Figure 9 – 502HTA Headphone Out, 12Khz, 24-Bit@96Khz, Jitter Test, 600 ohm ........................................................................... 23
Figure 10 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, 3dB, 600 ohm ..................................................................................... 24
Figure 11 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, 0dB, 600 ohm ..................................................................................... 25
Figure 12 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -3dB, 600 ohm .................................................................................... 26
Figure 13 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -6dB, 600 ohm .................................................................................... 27
Figure 14 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -12dB, 600 ohm .................................................................................. 28
Figure 15 - 502HTA Headphone Out, 1Khz, 24-Bit@96Khz, -60dB, 600 ohm (Generator set to 50mV rms) .................................... 29
