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Summary of Contents for PI 2 Design PI2AES
- Page 1 PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 Pi Pi Pi Pi 2 2 2 2 Media Media Media Media PI2AES Digital Pro Audio Hat Hardware Reference Manual © 2017 PI 2 Design PAGE 1...
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Page 2: Table Of Contents
Figure 2 – PI2AES Power, Simplified Block Diagram ........................11 Figure 3 – PI2AES Top View ................................14 Figure 4 – PI2AES Front View (shown mounted on Raspberry Pi) ....................15 Figure 5 – PI2AES Side View (shown mounted on Raspberry Pi) ....................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
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 2 2 2 2 OPERATING OPERATING OPERATING S S S S PECIFICATIONS OPERATING PECIFICATIONS PECIFICATIONS PECIFICATIONS 2.1 PI2AES OPERATING SPECIFICATIONS The PI2AES conforms to the following specifications: Specification Value Dimensions 85mm x 56.5mm... -
Page 5: Overview
OVERVIEW 3.1 INTRODUCTION The PI2AES, designed and manufactured by PI 2 Design, is a professional I/O Shield designed to bring Professional Studio Grade Audio to the Raspberry PI ® family of Single Board Computers. This low-cost Shield converts the Raspberry Pi ® I2S Interface to High Definition Digital Audio Coax, OPTO and Balanced XLR. -
Page 6: Figure 1 - Pi2Aes Block Diagram
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 5V @ 5A USB-A USB-A Switching Supply HOST HOST 2.5MM USB-A USB-A DC Jack HOST HOST AP1155 AP1155 10/100 RJ45 w/Transformer Clock Select TOSLINK NDK NZ2520SD OPTO 24.576Mhz NDK NZ2520SD 22.792Mhz... -
Page 7: On-Board Devices
PI2AES. 4.1 PI2AES I2C BUS DEVICES The following table describes the CPU I2C Bus usage of the PI2AES. 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
1. The WM8804 is controlled using the I2C port. Refer to the WM8804 documentation and Pi 2 Design supplied driver code for more detail. 2. The PI2AES is designed to operate the WM8804 in Master mode. In this mode the WM8804 receives its master clock from XIN and drives MCLK (unused), BCLK and LRCLK to the Pi. -
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 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
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 PUP/ PI2AES Description/Notes Name 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 Power
POWER 6.1 OVERVIEW The PI2AES is designed to be powered from an external +12V to +48V source. Jumper W2, when installed, allows the Raspberry PI to be powered from the PI2AES. When jumper W2 is removed, separate 5V power must be supplied to the Raspberry PI. -
Page 12: Pi2Aes Software
SOFTWARE 7.1 OVERVIEW Due to the various resources interfaced on the PI2AES, 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
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. Top View and Front View are shown in the following 3D renders. PAGE 13... -
Page 14: Figure 3 - Pi2Aes Top View
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 BALANCED AES XLR RCA COAX AND OPTO 2.5MM DC JACK P4 – I2S OVER HDMI P3 – I2S EXPANSION HEADER PIN 1 PIN 16 Figure 3 – PI2AES Top View PAGE 14... -
Page 15: Figure 4 - Pi2Aes Front View (Shown Mounted On Raspberry Pi)
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 COAX BALANCED 44.1K OPTO Figure 4 – PI2AES Front View (shown mounted on Raspberry Pi) PAGE 15... -
Page 16: J1 - Dc Jack
J1 – DC HDMI JACK Figure 5 – PI2AES Side View (shown mounted on Raspberry Pi) 8.2 J1 – DC JACK This jack is designed to accept a 5.5mm x 2.5mm center positive plug for external power in. Voltage must be +12V to +48V. -
Page 17: P3 - Xlr Balanced Output
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 MUTE 1 = Mute On I2C Clock I2C Data Ground Buffered I2S Data LRCLK Buffered I2S Left/Right (Word) Clock BCLK Buffered I2S Bit Clock Ground MCLK Buffered I2S Master Clock Ground *PSW Power Enable –... -
Page 18: U9 - Combo Rca/Opto Transmitter
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 P4 PIN Name Description Description PS Audio Pinout Gustard Pinout LRCLK+ I2S Left/Right Clock Plus I2S Left/Right Clock Minus Ground Ground LRCLK- I2S Left/Right Clock Minus I2S Left/Right Clock Plus MCLK+... -
Page 19: Document Revisions
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 9 9 9 9 DOCUMENT REVISIONS DOCUMENT REVISIONS DOCUMENT REVISIONS DOCUMENT REVISIONS Date Revision Change 03/26/2019 P0.1 Preliminary Release Table 7 – Document Revisions PAGE 19... -
Page 20: Errata
PI2Media PI2AES Hardware Reference Manual – P0.1 - 3/27/2019 10 10 10 10 ERRATA ERRATA ERRATA ERRATA 10.1 OVERVIEW There are currently no known errata for the PI2AES Rev. P1. PAGE 20...
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