STA321TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA321TR

4-channel digital audio system with FFX™ driver

STMicroelectronics 

STA321

Pin description

Table 2. Pin list (continued)

Pin Pull

Name

Type

Description

17 -

18 -

19 H

CLKOUT

SDA

MUTE

Out (digital)

In/Out (digital)

In (digital)

21 - REG_BYPASS In (analog)

24 - BIAS

In/Out (analog)

Buffered clock output

I2C serial data

Mute (active high)

DC regulator bypass:

0: normal operation, regulator enabled

1: regulator bypassed

ADC microphone bias voltage

26 -

27 -

29 -

30 -

VLO

VHI

INR1

INR2

In (analog)

In (analog)

In/Out (analog)

In/Out (analog)

ADC low reference voltage

ADC high reference voltage

ADC right channel line input1

ADC right channel line input2

31 -

32 -

33 -

VCM

INL2

INL1

34 H RSTN

35 - STBY

36 -

37 -

38 -

EAPWM4

EAPWM3

EAPWM2

In/Out (analog)

In (analog)

In (analog)

In (digital)

In (digital)

Out (digital)

Out (digital)

Out (digital)

ADC common mode voltage

ADC left channel line input2 or microphone input2

ADC left channel line input1 or microphone input1

Reset:

0: reset state

1: normal operation

Standby mode:

0: normal operation

1: power-down

External amplifier PWM 4B

External amplifier PWM 4A

External amplifier PWM 3B

39 - EAPWM1

40 H EAFTN

Out (digital)

Out (digital)

41 - EATSN

Out (digital)

External amplifier PWM 3A

External power fault signal:

0: fault

1: normal operational mode

External amplifier control:

0: active

1: 3-state

42 -

43 -

EAPDN

ACLK

44 L I2CDIS

48 L TM

51 - NC

Out (digital)

External amplifier powerdown (active low)

In (digital), schmitt tr Reserved pin, connect to ground

In (digital)

I2C disable:

0: I2C enabled

1: I2C disabled

In (digital)

Test mode:

0: normal operation

-

Not connected

Doc ID 15351 Rev 3

11/157

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