STA538B datasheet(7/59 Pages) STMICROELECTRONICS

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STA538

Connection diagrams and pin descriptions

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2.1.2

Pin description

Table 1.

Package: TFBGA48

Pin #

Name

Type

Description

RST_N

Digital input

Reset (active low)

XTI

Digital input

Crystal input or master clock input

MCLK33

Digital input

Master clock input 3.3 V capable

XTI: crystal input or master clock input 3.3 V capable

SELCLK33

Digital input

Master clock input selector:

SELCLK33 = 1 -> MCLK33 selected

SELCLK33 = 0 -> XTI selected

XTO

Digital output

Crystal output

CLKOUT/

PWM2B

Digital output

Buffered clock output / PWM2B FFXTm

SCL

Digital input

I2C serial clock

SDA

Digital

input/output

I2C serial data

I2CDIS

Digital input

I2C disable pin (active high)

STBY

Digital input

Standby (active high)

MUTE

Digital input

Mute (active high)

BICLKI

Digital

input/output

Input serial audio interface bit-clock

LRCLKI

Digital

input/output

Input serial audio interface L/R-clock

SDATAI

Digital input

Input serial audio interface data

BICLKO/

PWM1A

Digital

input/output

Output serial audio interface bit-clock

(volume DOWN when I2CDIS = 1) / PWM1A FFXTm

LRCLKO/

PWM1B

Digital

input/output

Output serial audio interface L/R-clock

(volume UP when I2CDIS = 1) / PWM1B FFXTm

SDATAO/

PWM2A

Digital output

Output serial audio interface data / PWM2A FFXTm

Digital input

Test mode (active high)

INL

Analog input

ADC left channel line input or microphone input

INR

Analog

input/output

ADC right channel line input

VBIAS

Analog

input/output

ADC microphone bias voltage

VCM

Analog

input/output

ADC common mode voltage

AVDD

Supply

ADC analog supply

AGND

Ground

ADC analog ground

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