STA538B datasheet(16/59 Pages) STMICROELECTRONICS

部件名	STA538B

功能描述	2 x 1.3 W class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX

PDF	59 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

16 / 59 page

Digital processing

STA538

16/59

Digital processing

The STA538 processor block is a digital block providing two channels of audio processing

and channel-mapping capability.

4.1

Signal processing flow

I2S or stereo ADC data can be selected. The I2S frequency range is from 8 kHz to 192 kHz.

ADC sampling frequency can be selected from 8 kHz to 48 kHz.

4.2

I2C interface disabled

When pin I2CDIS = 1, the SDA, SCL, LRCLKO and BICLKO pins can be pulled high or low

to change certain parameters of operation.

●

SDA = 0: FFX input comes from ADC

SDA = 1: FFX input comes from digital audio interface

●

SCL = 0: binary output mode (binary soft start/stop enabled)

SCL = 1: phase shift output mode

●

LRCLKO = 0: no volume change

LRCLKO = 1: volume up

●

BICLKO = 0: no volume change

BICLKO = 1: volume down

At power up, the master volume is set to -60 dB. When holding pin LRCLKO = 1 and pin

BICLKO = 1 simultaneously, the master volume is set to 0 dB. A high pulse on pin LRCLKO

causes a master volume change of +0.5 dB and a high pulse on pin BICLKO causes a

master volume change of -0.5 dB.

STA538B 数据表(PDF) 16 Page - STMicroelectronics