STA333W datasheet(22/42 Pages) STMICROELECTRONICS

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STA333W

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Thermal warning adjustment bypass

The on-chip STA333W power output block provides feedback to the digital controller using

inputs to the power control block. The TWARN input is used to indicate a thermal warning

condition. When TWARN is asserted (set to 0) for a period of time greater than 400 ms, the

power control block will force a -3dB output limit (determined by TWOCL in coeff RAM) to

the modulation limit in an attempt to eliminate the thermal warning condition. Once the

thermal warning output limit adjustment is applied, it remains in this state until reset, unless

FDRB = 0.

Fault detect recovery bypass

The on-chip STA333W power output block provides feedback to the digital controller using

inputs to the power control block. The FAULT input is used to indicate a fault condition (either

over-current or thermal). When FAULT is asserted (set to 0), the power control block will

attempt a recovery from the fault by asserting the tri-state output (setting it to 0 which directs

the power output block to begin recovery), hold it at 0 for period of time in the range of .1ms

to 1 second as defined by the fault detect recovery constant register (FDRC registers 0x29-

2A), then toggle it back to 1. This sequence is repeated as log as the fault indication exists.

This feature is enabled by default but can be bypassed by setting the FDRB control bit to 1.

7.1.2

Configuration register B (address 0x01)

Serial audio input interface format

Table 13.

Thermal warning adjustment

Bit

R/W

RST

Name

Description

6R/W

1TWAB

Thermal warning adjustment bypass:

0: thermal warning adjustment enabled

1: thermal warning adjustment disabled

Table 14.

Fault detect recovery

Bit

R/W

RST

Name

Description

7R/W

0FDRB

Fault detect recovery bypass:

0: fault detect recovery enabled

1: fault detect recovery disabled

C2IM

C1IM

RES

SAIFB

SAI3

SAI2

SAI1

SAI0

00000

Table 15.

Serial audio input interface format

Bit

R/W

RST

Name

Description

0R/W

0SAI0

The serial audio input interface format determines

the interface format of the input serial digital audio

interface.

1R/W

0SAI1

2R/W

0SAI2

3R/W

0SAI3

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