KNOWLES – KAS-33100-0004 “MUSKIE” MICROPHONE EVALUATION KIT USERS GUIDE
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QUICK START SETTINGS FOR PDM DIGITAL MICROPHONES
Figure 16: PDM Microphone Setup
The KC10143 Muskie board supports both mono and
stereo digital microphone configurations.
Microphone types may be mixed.
1. Set VDD voltage level.
2. Verify Microphone Current Bypass jumper
installed. Alternatively see section on Taking
Current Measurements.
3. Set Digital Mic Selector switch to PDM.
4. Install Mic2 VDD Test Jumper to VDD
(default setting).
5. Set Audio Path selector to DIG for the
corresponding socket.
6. Make connection to desired audio output. All
audio output paths (XLR, Headset, USB)
pass audio simultaneously.
7. Set signal gain.
8. Install jumper for desired PDM clock
frequency.
9. Insert microphones into socket using the
correct orientation.
10. Insert a suitable 5V power source into USB
Power In connector.
11. Set power switch to ON
Magnitude Response PDM Input - XLR Output
Figure 17: PDM Input – XLR Output
Magnitude Response PDM Input-Headset Output
Figure 18: PDM Input – Headset Jack Output
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1
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z
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Frequency (Hz)
PDM CLK @4.8MHz
PDM CLK @3.072MHz
PDM CLK @1.532MHz
PDM CLK @768KHz
-18
-15
-12
-9
-6
-3
0
3
6
9
12
15
18
10
100
1000
10000
S
e
n
s
it
iv
it
y
R
e
la
ti
v
e
t
o
1
k
H
z
(
d
B
)
Frequency (Hz)
PDM CLK @4.8MHz
PDM CLK @3.072MHz
PDM CLK @1.532MHz
PDM CLK @768KHz