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Summary of Contents for PI 2 Design PI2AES 2.0
- Page 1 Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 Pi 2 Design PI2AES 2.0 2.0 Digital Pro Audio Hat Hardware Reference Manual © 2023 PI 2 Design PAGE 1...
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Page 2: Table Of Contents
Figure 2 – PI2AES 2.0 Power, Simplified Block Diagram ......................... 11 Figure 3 – PI2AES 2.0 Top View ..............................15 Figure 4 – PI2AES 2.0 Front View (shown mounted on Raspberry Pi 4) ..................15 Figure 5 – PI2AES 2.0 Side View (shown mounted on Raspberry Pi 4) ................... 16... -
Page 3: Warranty
This warranty is valid only for so long as the product is used intact as shipped from PI 2 Design. Any attempt or effort to alter the Product, including but not limited to any attempt to solder, de-solder, unplug, replace, add or affix any part or component of... -
Page 4: Operating Specifications
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 2 2 2 2 OPERATING OPERATING OPERATING S S S S PECIFICATIONS OPERATING PECIFICATIONS PECIFICATIONS PECIFICATIONS 2.1 PI2AES 2.0 OPERATING SPECIFICATIONS The PI2AES 2.0 conforms to the following specifications:... -
Page 5: Overview
Single Board Computers. This low-cost Shield converts the Raspberry Pi ® I2S Interface to High Definition Digital Audio Coax, OPTO and Balanced XLR. The addition of I2S LVDS Differential over HDMI allows the PI2AES 2.0 to interface with virtually any High Performance DAC on the market. -
Page 6: Figure 1 - Pi2Aes 2.0 Block Diagram
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 5V Protection USB3-A USB-A Circuit HOST HOST 2.5MM USB3-A USB-A DC Jack HOST HOST LT3405 LT3045 1:1 Isolation 1GBit RJ45 Transformer w/Transformer Clock Select OPTO NDK NZ2520SD 24.576Mhz... -
Page 7: On-Board Devices
PI2AES 2.0. 4.1 PI2AES 2.0 I2C BUS DEVICES The following table describes the CPU I2C Bus usage of the PI2AES 2.0. Most of these addresses are set by the startup script supplied by Pi2Design. Refer to the respective device documentation for more detail. -
Page 8: Wm8804 Spdif Transmitter Notes
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 AES3/SPDIF encoded digital audio output Table 3 – RPi to WM8804 Connections 4.1.1 WM8804 SPDIF TRANSMITTER NOTES 1. The WM8804 is controlled using the I2C port. Refer to the WM8804 documentation and Pi 2 Design supplied driver code for more detail. -
Page 9: Rpi Gpio
5 5 5 5 R R R R PI PI PI PI GPIO GPIO GPIO GPIO 5.1 OVERVIEW The PI2AES 2.0 uses a number of signals from the RPi GPIO header for control and status purposes. This usage is defined in the following table. PUP/ PI2AES Description/Notes Name RPi +3.3V - Unused... -
Page 10: Rpi Gpio Notes
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 PUP/ PI2AES Description/Notes Name GPIO25 Unused GPIO11 Unused GPIO8 Unused GPIO1 Unused ID_SDA Unused ID_SCL Unused GPIO5 1 = Select 22.5792Mhz Clock Input to WM8804 GPIO6 1 = Select 24.576Mhz Clock Input to WM8804... -
Page 11: Pi2Aes 2.0 Power
POWER 6.1 OVERVIEW The PI2AES 2.0 is designed to be powered from either the Raspberry PI GPIO Pins 1 and 3, or from an external +5V (+/-5%) source. Jumper W2, when installed, allows the Raspberry PI to be powered from the PI2AES 2.0. When jumper W2 is removed, separate 5V power must be supplied to the Raspberry PI. -
Page 12: Pi2Aes 2.0 Software
SOFTWARE 7.1 OVERVIEW Due to the various resources interfaced on the PI2AES 2.0, both internal and external to the RPi, it is necessary to initialize a large number of CPU registers and external devices before correct operation can begin. These values and their proper sequencing are beyond the scope of this document. -
Page 13: Top Side Connectors
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 8 8 8 8 TOP SIDE CONNECTORS TOP SIDE CONNECTORS TOP SIDE CONNECTORS TOP SIDE CONNECTORS 8.1 OVERVIEW This section provides the type, location, and pinout for the various connectors on the PI2AES 2.0. - Page 14 Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 BALANCED AES XLR RCA SPDIF AND OPTO COAX 2.5MM DC JACK P4 – I2S OVER HDMI PAGE 14...
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Page 15: Figure 3 - Pi2Aes 2.0 Top View
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 Figure 3 – PI2AES 2.0 Top View SPDIF BALANCED OPTO COAX Figure 4 – PI2AES 2.0 Front View (shown mounted on Raspberry Pi 4) PAGE 15... -
Page 16: J1 - Dc Jack
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 P4 – I2S J1 – DC HDMI JACK Figure 5 – PI2AES 2.0 Side View (shown mounted on Raspberry Pi 4) 8.2 J1 – DC JACK This jack is designed to accept a 5.5mm x 2.5mm center positive plug for external... -
Page 17: U9 - Combo Rca/Opto Transmitter
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 P4 PIN Name W1 Jumper 5-6 In W1 Jumper 5-6 Out PS Audio Pinout Gustard Pinout TD2+ SDO- Data Minus SDO+ Data Plus Ground Ground TD2-... -
Page 18: Document Revisions
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 9 9 9 9 DOCUMENT REVISIONS DOCUMENT REVISIONS DOCUMENT REVISIONS DOCUMENT REVISIONS Date Revision Change 04/19/2023 P1.0 First Release Table 6 – Document Revisions PAGE 18... -
Page 19: Errata
Pi 2 Design – PI2AES 2.0 2.0 Hardware Reference Manual – P1.0 - 4/19/2023 10 10 10 10 ERRATA ERRATA ERRATA ERRATA 10.1 OVERVIEW There are currently no known errata for the PI2AES 2.0 Rev. P1. PAGE 19...
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