Product Info

VTech proprietary and confidential

VTech Communications LTD.

R&D Department

The document is VTech’s proprietary information, Please do not disclose to third party without VTech’s consent

Ref. No.: 20191009 Version: 01 Date: 09 Oct, 2019 Page 21 of 33

-14.5 dB

9.5 dB

-12.0 dB

12.0 dB

7.3 I²S1 and I²S2 interface

VTBM-A01 BT Module supports I²S input and output via its two industry-standard I²S digital audio interfaces, left-justified

or right-justified.

NOTE In this section, terms are defined as follows:

• I²S refers to the I²S1 and I²S2 interfaces.

• SD_IN refers to I2S1_SD_IN or I2S2_SD_IN.

• SD_OUT refers to I2S1_SD_OUT or I2S2_SD_OUT

• WS refers to I2S1_WS or I2S2_WS.

• SCK refers to I2S1_SCK or I2S2_SCK.

VTBM-A01 BT Module also supports several alternative PCM data formats.

I²S pin

PCM function

I2Sn_SD_IN

PCM_IN

I2Sn_SD_OUT

PCM_OUT

I2Sn_WS

PCM_SYNC

I2Sn_SCK

PCM_CLK