7.2 DFSDM microphones module (MB1299)
7.2.1 Description
A DFSDM Beam Forming microphone module (MB1299) can be connected to STM32H7B3LIH6QU DFSDM
interface through CN4.
MB1299 module embeds five DFSDM MEMS microphones STMicroelectronics MP34DT01TR-M:
• One microphone for detection in the center (CLK_0, DATA_0)
• Four other microphones for beamforming (CLK_1, DATA_1, and DATA_3)
Figure 23. MEMS beamforming microphone module (MB1299)
DATA_0 / CLK_0
DATA_3 / CLK_1
DATA_1 / CLK_1
DATA_1 / CLK_1
RED LED
_____
DATA_3 / CLK_1
_____
MB1299
CLK_0 and CLK_1 : data valid when clock is high
CLK_1 : data valid when clock is low
_____
Table 26. DFSDM channel connection between MCU, MB1331, and MB1299
MB1299 function
MB1331 function MCU pin
CLK_0 DFSDM12_CKOUT PB0
DATA_0 DFSDM12_DATIN1 PB12
CLK_1 DFSDM12_CKOUT PB0
DATA_1 DFSDM1_DATIN3 PC7
DATA_3 DFSDM1_DATIN5 PB6
VCC_LED GPIO OUTPUT PB8
DETECTn GPIO INPUT
PC5
(2)
1. Not connected by default (Conflict with OCSPI1_DQS)
UM2662
DFSDM microphones module (MB1299)
UM2662 - Rev 1
page 33/95
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