STA335W datasheet(25/43 Pages) STMICROELECTRONICS

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STA335W

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5.3.3

Over-current warning detect adjustment bypass

The OCWARN input is used to indicate an over-current warning condition. When OCWARN

is asserted (set to 0), the power control block forces an adjustment to the modulation limit

(default is -3 dB) in an attempt to eliminate the over-current warning condition. Once the

over-current warning volume adjustment is applied, it remains in this state until reset is

applied. The level of adjustment can be changed via the TWOCL (thermal warning/over

current limit) setting which is address 0x37 of the user defined coefficient RAM.

5.4

Configuration register D (addr 0x03)

5.4.1

Post-scale link

Post-scale functionality can be used for power-supply error correction. For multi-channel

applications running off the same power-supply, the post-scale values can be linked to the

value of channel 1 for ease of use and update the values faster.

5.4.2

Zero-detect mute enable

Setting the ZDE bit enables the zero-detect automatic mute. The zero-detect circuit looks at

the data for each processing channel at the output of the crossover (bass management)

filter. If any channel receives 2048 consecutive zero value samples (regardless of fs) then

that individual channel is muted if this function is enabled.

5.5

Configuration register E (addr 0x04)

Table 26.

Over-current warning bypass

Bit

R/W

RST

Name

Description

R/W

OCRB

0: Over-Current warning adjustment enabled

1: Over-Current warning adjustment disabled

Reserved

ZDE

Reserved

PSL

Reserved

Table 27.

Post-scale link

Bit

R/W

RST

Name

Description

R/W

PSL

0: Each channel uses individual post-scale value

1: Each channel uses channel 1 post-scale value

Table 28.

Zero-detect mute enable

Bit

R/W

RST

Name

Description

R/W

ZDE

Setting of 1 enables the automatic zero-detect mute

SVE

ZCE

DCCV

PWMS

AME

NSBW

MPC

MPCV

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