miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
14
4
C
USTOM
M
ICROPHONE
B
OARD
D
EVELOPMENT
In an effort to help the community, miniDSP is providing full schematics of the microphone board PCB
(nanoSHARC kit not included). Please consult the appendix at the end of this manual. Based on a simple 2-layer
design, one can easily route a test PCB to trial various microphone arrangements.
NOTE: Electronic engineering support is unfortunately outside miniDSP’s support structure. If
you were to design your own MEMS array and lack the engineering knowledge to do so, we
strongly recommend that you to seek 3
rd
party engineering support. Thanks for your
understanding!
4.1
H
EADERS AND PINOUTS
The MCHStreamer Lite circuit board has three 12-pin headers for logic-level I/O, as shown in Figure 1 below.
Most data lines are on header J1, while J2 carries auxiliary signaling and GPIO lines reserved for future
enhancement. J3 is used only for PDM format. Two cables terminated with suitable (2x6, 2mm pitch) 12-pin
headers are supplied with the MCHStreamer Lite kit version.
All lines are 3.3V logic levels. Connected circuits must use a compatible logic level.
Figure 1. MCHStreamer Lite board layout
