MERUS™ audio amp HAT ZW
User manual - KIT_40W_AMP_HAT_ZW
About this document
Scope and purpose
This document describes the MERUS
TM
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 MERUS
TM
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
1 MERUS™
audio amp HAT overview ........................................................................................... 3
1.1 Key features ............................................................................................................................................. 3
1.2 Application and block diagram ............................................................................................................... 4
2 MERUS™ audio amp HAT description ........................................................................................ 5
2.1 Features and specifications .................................................................................................................... 5
2.2 Audio 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 I
2
S digital audio interface configuration ......................................................................................... 10
2.3.5 GPIO controls ................................................................................................................................... 10
2.3.6 Short-circuit protection ................................................................................................................... 10
3 Hardware setup .................................................................................................................... 11
4 Software setup ..................................................................................................................... 12
4.1 Raspberry Pi OS (previously called Raspbian) ..................................................................................... 12
4.1.1 Official Raspberry Pi OS method ..................................................................................................... 12
4.1.2 MERUS
TM
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
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