STA321MPL 查看數據表（PDF） - STMicroelectronics

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STA321MPL

Scalable digital microphone processor

STMicroelectronics 

Registers

STA321MP

Bit RW RST

Name

Description

0

RW

0

DSPB

DSP bypass bit:

0: normal operation

1: bypass of biquad and bass/treble functions

Setting the DSPB bit bypasses the biquad function of the FFX core.

COS[1,0]

00

01

10

11

CKOUT frequency

PLL output

PLL output / 4

PLL output / 8

PLL output / 16

Application example:

● External clock: XTI=11.2896 MHz

● COS[1,0] = 10: CKOUT= 90.3168 MHz / 8 = 11.2896 MHz

● External Dual Flip Flop PDM I/F = CKOUT/4 = 2.8224 MHz, also provided to the

microphones

● MCS[2:0]= 011: XTI /Fs = 4

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Doc ID 022647 Rev 1

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