PDM Electrical Specification

nRF5340 Product Specification

Symbol Description Min. Typ. Max. Units
fPDM,CLK,64

PDM clock speed. PDMCLKCTRL = Default (Setting needed for 16 MHz sample frequency @ RATIO = Ratio64)

1.032 MHz
fPDM,CLK,80

PDM clock speed. PDMCLKCTRL = 1280K (Setting needed for 16 MHz sample frequency @ RATIO = Ratio80)

1.280 MHz
tPDM,JITTER

Jitter in PDM clock output

20 ns
TdPDM,CLK

PDM clock duty cycle

40 50 60 %
tPDM,DATA

Decimation filter delay

5 ms
tPDM,cv

Allowed clock edge to data valid

125 ns
tPDM,ci

Allowed (other) clock edge to data invalid

0 ns
tPDM,s

Data setup time at fPDM,CLK = 1.024 MHz or 1.280 MHz

65 ns
tPDM,h

Data hold time at fPDM,CLK = 1.024 MHz or 1.280 MHz

0 ns
GPDM,default

Default (reset) absolute gain of the PDM module

3.2 dB
Figure 8. PDM timing diagram

PDM timing diagram