KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE
knowles.com | KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE
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4
Adjustable
VDD
5
MIC
Current
5
6
Digital
MIC
Selector
7
7
8
8
9
9
Analog
Mic1
Analog
Mic1
Digital
Mic1
Digital
Mic2
I2S Mic2
I2S Mic1
10
18
18
10
11
Dual Mic
Test
Jumpers
Analog Mic
Type
Selectors
Analog/Digital
Mic Type
Selectors
Right Channel
Audio Output
12
1
2
Power
Switch
USB Micro B
Power
Connector
3
VDD
Selector
17
16
Left Channel
Audio Output
Headset Jack
Audio Output
15
13
14
USB Micro B
Audio
Connector
Digital Mics
Clock Frequency
Selector
Audio Gain
Selectors
Figure 4: KC10143 Muskie Functional Description
FUNCTIONAL DESCRIPTION
1.
Main Power Switch
Slide switch. When placed in the ON position will enable the
internal voltage regulators and support circuitry. If all internal
supplies power up correctly the POWER GOOD LED will
turn on.
2.
USB connector for main power.
USB Micro B connector. Source power for Muskie board.
Knowles recommends using a USB based battery similar to
Insignia model # MB5202B for supplying clean power to kit.
3.
Microphone VDD Selector
Slide switch allows microphone voltage selection. Supports
common microphone voltages, +3.3V, +2.75V, and +1.8V.
The ADJ selection generates unique VDD voltages.
4.
Adjustable VDD
Setting the VDD SELECTOR to ADJ enables the VDD-ADJ
potentiometer to generate a custom VDD voltage. The
adjustable voltage range is from ~+1.6V to ~+3.65V.
Refer to microphone specifications for acceptable input
voltages.
5.
MIC Current Jacks
Banana jack compatible, for measuring current using an
external current meter. Note: remove jumper labeled
BYPASS to enable.
6.
Digital MIC Selector
Sets signal path for digital microphones. Select between
PDM digital and I2S digital.
