10.5 Interfacing with a Digital Microphone

The SAMA7G54 SOM Series integrates two Pulse Density Modulation Interface Controllers (PDMC). Each PDMC interface controls and decodes up to four digital microphones on the line with a 48 kHz sampling rate.

Table 10-38. PDMC Interface Configurations
Interface Instance	IO Set	Pin No.	Pin Name	Function
PDMC0	1	156	PB9	PDM0 Clock Line
		148	PB10	PDM0 Data 0 Line
		158	PB11	PDM0 Data 1 Line
PDMC0	2	27	PD22	PDM0 Clock Line
		28	PD23	PDM0 Data 0 Line
		32	PD24	PDM0 Data 1 Line
PDMC1	1	126	PA2	PDM1 Clock Line
		128	PA3	PDM1 Data 0 Line
		121	PA4	PDM1 Data 1 Line
PDMC1	2	30	PD25	PDM1 Clock Line
		36	PD26	PDM1 Data 0 Line
		34	PD27	PDM1 Data 1 Line