Pi 2 Design – PI2AES-LITE Hardware Reference Manual – P2.0 - 12/8/2022
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Table of Contents
1 Warranty......................................................................................................................................................................................... 3
2 Operating Specifications ................................................................................................................................................................. 4
2.1 PI2AES-LITE Operating specifications ................................................................................................................................... 4
3 Overview ........................................................................................................................................................................................ 5
3.1 Introduction ............................................................................................................................................................................. 5
3.2 Block Diagram......................................................................................................................................................................... 5
4 On-Board Devices .......................................................................................................................................................................... 7
4.1 Overview ................................................................................................................................................................................. 7
4.1 PI2AES-LITE I2C Bus Devices ............................................................................................................................................... 7
4.1 WM8804 SPDIF Transmitter.................................................................................................................................................... 7
4.1.1 WM8804 SPDIF Transmitter Notes .................................................................................................................................. 8
4.2 Dual High Resolution NDK Clocks........................................................................................................................................... 8
4.3 3.3V to 5V Buffer..................................................................................................................................................................... 8
5 RPi GPIO........................................................................................................................................................................................ 9
5.1 Overview ................................................................................................................................................................................. 9
5.1.1 RPi GPIO Notes............................................................................................................................................................. 10
6 PI2AES-LITE Power .................................................................................................................................................................... 11
6.1 Overview ............................................................................................................................................................................... 11
7 PI2AES-LITE Software ................................................................................................................................................................ 12
7.1 Overview ............................................................................................................................................................................... 12
8 Connectors ................................................................................................................................................................................... 13
8.1 Overview ............................................................................................................................................................................... 13
9 Document Revisions..................................................................................................................................................................... 14
10 Errata.......................................................................................................................................................................................... 15
10.1 Overview ............................................................................................................................................................................. 15
11 Case Assembly........................................................................................................................................................................... 16
11.1 Overview ............................................................................................................................................................................. 16
11.2 Part DescriPtions................................................................................................................................................................. 16
11.3 Assembly Step 1 ................................................................................................................................................................. 18
11.4 Assembly Step 2 ................................................................................................................................................................. 19
11.5 Assembly Step 3 ................................................................................................................................................................. 20
11.6 Assembly Step 4 ................................................................................................................................................................. 21
11.7 Assembly Step 5 ................................................................................................................................................................. 22
List of Tables
Table 1 – PI2AES-LITE Operating Specifications .............................................................................................................................. 4
Table 2 – PI2AES-LITE I2C Bus Devices.......................................................................................................................................... 7
Table 3 – RPi to WM8804 Connections ............................................................................................................................................. 8
Table 4 – CPU GPIO Pin Assignments............................................................................................................................................ 10
Table 4 – PI2AES-LITE Connector Locations .................................................................................................................................. 13
Table 7 – Document Revisions ........................................................................................................................................................ 14
List of Figures
Figure 1 – PI2AES-LITE Block Diagram............................................................................................................................................ 6
Figure 2 - PI2AES-LITE Acrylic Case Parts ..................................................................................................................................... 17
