3.4.8 Quad MEMS Microphones

The SAMA7G54-EK embeds four digital MEMS microphones SPK0641HT4H-1.

Those microphones convert acoustic pressure waves into a digital signal. This signal is acquired by the SAMA7G5 MPU through a PDMIC interface as shown in the following schematic.

Figure 3-45. QUAD MEMS Microphones Schematic

Table 3-37. Digital MEMS Signal Descriptions
PIO	Signal Name	Shared With	Signal Description
PD22	PDMC0_CLK_PD22	Ethernet 10/100	PDM clock line for all microphones
PD23	PDMC0_DS0_PD23	Ethernet 10/100	PDM data line 0 (data from MIC1 and MIC2)
PD24	PDMC0_DS1_PD24	Ethernet 10/100	PDM data line 1 (data from MIC3 and MIC4)

Note: To activate the PDM interface, place the jumper JP2 on the connector J3 as defined in GPIO Distribution. In this mode, the Ethernet 10/100 interface is not accessible.