IMX95CEC datasheet(46/113 Pages) NXP

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The PDM microphones must meet the setup and hold timing requirements shown in the following table. The "k" factor value in

Table 48 depends on the selected quality mode as shown in Table 49.

Table 48. PDM timing parameters

Parameter

Value

trs, tfs

≤ floor (k x CLKDIV) -1 / PDM_CLK_ROOT rate

trh, tfh

≥ 0

1. Depending on K value, user must make sure floor (K x CLKDIV) > 1 to avoid timing problems.

Table 49. K factor value

Quality factor

K factor

High Quality

1/2

Medium Quality, Very Low Quality 0

Low Quality, Very Low Quality 1

Very Low Quality 2

Figure 17 illustrates the timing requirements for the PDM.

PDM_CLK

trs

tfs

PDM_DATAn

Left

Data

High

Impedance

Right

Data

High

Impedance

Left

Data

High

Impedance

Right

Data

Impedance

Data

Impedance

Data

Impedance

Data

trh

tfh

Left

Data

High

Impedance

Right

Data

Right

Data

High

Impedance

High

Impedance

Left

Data

Figure 17. PDM input/output timing requirements

NXP Semiconductors

IMX95CEC

i.MX 95 Applications Processors Data Sheet for Commercial Products

IMX95CEC

All information provided in this document is subject to legal disclaimers.

Preliminary Data Sheet

Rev. 2 — 11 November 2024

Preliminary - Subject to Change Without Notice

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