link to page 1 link to page 1 link to page 4 link to page 4 link to page 5 link to page 5 link to page 5 link to page 5 link to page 6 link to page 8 link to page 9 link to page 10 link to page 11 link to page 11 link to page 8 link to page 11 link to page 2 link to page 4 link to page 5 link to page 6 link to page 7 link to page 7 link to page 8 link to page 10 Raspberry Pi HAT for CMX655D EV6550DHAT CONTENTS Section Page 1Introduction ... 12CMX655D Ultra-low Power Voice Codec ... 13Raspberry Pi Compatibility ... 44Power Supplies ... 45Handling Precautions .. 56Quick STart ... 5 6.1 Mounting The EV6550DHAT To The Raspberry Pi ... 5 6.2 Software Installation ... 5 6.3 GUI Description and Board Operation ... 6 7Supplied Source Code ... 88GUI ‘C’ Source Files and Modification ... 99Troubleshooting ... 1010Additional Hardware Information ... 11 10.1 Hardware Test Points .. 11 Table Page Table 1 EV6550DHAT Software Files .. 8 Table 2 Test Points ... 11 Figure Page Figure 1 CMX655D Functional Block Diagram ... 2 Figure 2 40-way GPIO Connector Power Pins .. 4 Figure 3 EV6550D 40-way GPIO Signal Path Routing Diagram .. 5 Figure 4 EV6550DHAT GUI ... 6 Figure 5 EV6550DHAT GUI - Recording Audio ... 7 Figure 6 EV6550DHAT GUI - Playing Audio .. 7 Figure 7 EV6550DHAT Software Files .. 8 Figure 8 Geany Build Screen .. 10 HistoryVersionChangesDate A Advance Draft 6th November 2019 1 First public release 11th November 2019 This document is Provisional status and will be subject to future modification. It should not be relied on for final product design. 2019 CML Microsystems Plc 3 UM6550DHAT/1 Document Outline User Manual Front Page 1 Introduction 2 CMX655D Ultra-low Power Voice Codec 3 Raspberry Pi Compatibility 4 Power Supplies 5 Handling Precautions 6 Quick Start 6.1 Mounting The EV6550DHAT To The Raspberry Pi 6.2 Software Installation 6.3 GUI Description and Board Operation 7 Supplied Source Code 8 GUI ‘C’ Source Files and Modification 9 Troubleshooting 10 Additional Hardware Information 10.1 Hardware Test Points End of Document