6.7 Digital Stereo Microphones
The EFM32 Giant Gecko GG11 Starter Kit features two Knowles SPK0838HT4H-B digital MEMS microphones with PDM output config-
ured to form a stereo sound input device. The output from both microphones is connected to a PDM to I2S codec which again is
connected to a USART peripheral with I2S support on the EFM32.
MIC_ENABLE
PI13 (US3_RX #5)
PI14 (US3_CLK #5)
PD0 (GPIO)
MIC_I2S_BCLK
MIC_I2S_DATA
VDD
PDM
to
I2S
codec
EFM32
PDM MEMS
Microphone (R)
PDM MEMS
Microphone (L)
PI15 (US3_CS #5)
VDD
PDM_CLK
PDM_CLK
PDM_DATA
PDM_DATA
VDD
MIC_I2S_LRCLK
Figure 6.7. Digital Stereo Microphones
UG287: EFM32 Giant Gecko GG11 Starter Kit User's Guide
Peripherals
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