BM20 datasheet(15/46 Pages) MICROCHIP

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Stereo Module

 2015 Microchip Technology Inc.

Page 15

Preliminary Edition

2.2 I

2S Signal Application for BM23

BM23 support I

2S digital audio signal interface to connect your external CODEC/DSP. It provide 8k

Hz, 44.1k Hz and 48k Hz sampling rate; it also support 16 bits and 24bits data format. The I

2S setting

can be set up by UI and DSP tools.

The external CODEC/DSP needs to be connected to SLK0, RFS0, TFS0, DR0, and DT0 (pins 4, 2, 3,

5, and 6 respectively). The I

2S signal connection between BM23 and external DSP as below:

FIGURE 2-9: MASTER MODE REFERENCE CONNECTION

FIGURE 2-10: SLAVE MODE REFERENCE CONNECTION

Note 1: For 002 version chip or module, system should connect line 1 in slave mode figure.

And, system not support ADC signal from external DSP/CODEC.

Note 2: For other version chip or module, system should connect line 2 in slave mode figure.

About

“Mast” or “Slave” mode setting, you can use “DSP Configuration Tool” to set up system.

BM23

RFS0

TFS0

DR0

SCLK0

DACLRC

BCLK

ADCDAT

DACDAT

DT0

EXTERNAL

DSP/CODEC

BM23

RFS0

TFS0

DR0

SCLK0

DACLRC

BCLK

ADCDAT

DACDAT

DT0

EXTERNAL

DSP/CODEC

(*1)

(*2)

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