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TFA9812_2

© NXP B.V. 2009. All rights reserved.

[1]

The diagnostic pin 30 DIAG is flagged when several protection mechanisms have been active, see

.

 shows the control level supported by either I

2

C or Legacy control mode for all

functions described in

. It summarizes the information provided in the detailed

description of each function.

3

UVP3V3

Undervoltage detector for pins 3 and 40:

0 = No UVP has been detected

1 = A UVP has been detected since the last read-out of
the register

2

DIAG

Diagnostic pin flagging status

:

0 = Diagnostic pin has not been flagged low

1 = Diagnostic pin has been flagged low since the last
read-out of the register

1

LP

PLL lock protection indicator:

0 = PLL is in locked status

1 = PLL is not in locked status

0

MUTE

Soft mute status:

0 = No soft-mute or soft mute/demute in progress

1 = Audio signal muted as result of a soft mute

 …continued

D = fixed control setting, determined by default I

2

C register setting; N = not supported; Y = fully

supported (i.e. all options implemented in the TFA9812).

I

2

C register content

Y

N/D

Sleep mode enable

Y

Y

Operating mode enable

Y

Y

3-state mode enable

Y

Y

Master/Slave I

2

S

Y

Y

MCLK/BCK master input clock selection

Auto

Auto

Digital audio input format selection

Y

Subset

Selection f

s

 = 8 kHz to192 kHz

Y

Equalizer enable and configuration

Y

Detailed equalizer settings

Y

N

Digital volume control per channel

Y

N

Analog volume control (shared for two channels)

N

Y

De-emphasis for subset of allowed f

s

Y

N

Soft mute

Y

Y

Hard mute

Y

N

Polarity switch enable

Y

N

+24 dB gain boost

Y

Y