MERUS™ audio amp HAT ZW
User manual - KIT_40W_AMP_HAT_ZW
About this document
Scope and purpose
This document describes the MERUSTM audio amp HAT for Raspberry Pi Zero W equipped with the Infineon
MA12070P proprietary multilevel class D amplifier. Detailed information is provided on the board’s content,
layout and use. A Raspberry Pi Zero W is mandatory for operation.
Intended audience
This document is intended for anyone working with the MERUSTM audio amp HAT, such as makers and audio
engineers.
Attention: Read through this user manual before operating the board.
Attention: Observe proper volume and limiter settings handling procedures. Failure to do so may result
in damage to components on the board.
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 1
1MERUS™audio amp HAT overview ........................................................................................... 3
1.1 Key features.............................................................................................................................................3
1.2 Application and block diagram...............................................................................................................4
2MERUS™ audio amp HAT description ........................................................................................ 5
2.1 Features and specifications ....................................................................................................................5
2.2Audio performance..................................................................................................................................5
2.3 Hardware description .............................................................................................................................5
2.3.1 Board description and pin functions.................................................................................................5
2.3.2 Schematics .........................................................................................................................................7
2.3.3 Required input power ......................................................................................................................10
2.3.4 I2S digital audio interface configuration .........................................................................................10
2.3.5 GPIO controls ...................................................................................................................................10
2.3.6 Short-circuit protection...................................................................................................................10
3Hardware setup ....................................................................................................................11
4Software setup .....................................................................................................................12
4.1 Raspberry Pi OS (previously called Raspbian) .....................................................................................12
4.1.1 Official Raspberry Pi OS method .....................................................................................................12
4.1.2 MERUSTM custom kernel building (optional for advanced users)...................................................14
4.2 moOde audio player..............................................................................................................................14
4.2.1 Official moOde audio player method..............................................................................................14
4.3 Volumio..................................................................................................................................................16
4.3.1 Official Volumio method..................................................................................................................16
