STA335W datasheet(35/43 Pages) STMICROELECTRONICS

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STA335W

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5.13.1

Extended Soft Volume configuration registers (addr 0x37 - 0x38)

Soft volume update has a fixed rate by default. Using register 0x37 and 0x38 it is possible to

override the default behavior allowing different volume change rates.

It is also possible to independently define the fade-in (volume is increased) and fade-out

(volume is decreased) rates according to the desired behavior.

When SVUPE = 1 the fade-in rate is defined by the SVUP[4:0] bits according to the

following formula:

Fade-in rate = 48 / (N + 1) dB/ms

where N is the SVUP[4:0] value.

Table 49.

Status register bits

Bit

R/W

RST

Name

Description

PLLUL

PLL locked

1: PLL not locked

FAULT

0: fault detected on power bridge

1: normal operation

UVFAULT

0: VCCxX internally detected

< undervoltage threshold

OVFAULT

0: VCCxX internally detected

> overvoltage threshold

OCFAULT

0: overcurrent fault detected

OCWARN

0: overcurrent warning

TFAULT

0: thermal fault, junction temperature over limit

detection

TWARN

0: thermal warning, junction temperature is close to

the fault condition

SVUPE

SVUP[4]

SVUP[3]

SVUP[2]

SVUP[1]

SVUP[0]

SVDWE

SVDW4]

SVDW[3]

SVDW[2]

SVDW[1]

SVDW[0]

SVUPE

Mode

When volume is increased, use the default rate

When volume is increased, use the rates defined by SVUP[4:0] .

SVDWE

Mode

When volume is decreased, use the default rate

When volume is decreased, use the rates defined by SVDW[4:0] .

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