STA381BW datasheet(59/171 Pages) STMICROELECTRONICS

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STA381BW

Doc ID 018835 Rev 7

59/171

The on-chip STA381BW 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

overcurrent or thermal). When FAULT is asserted (set to 0), the power control block attempts

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

power output block to begin recovery), holds it at 0 for period of time in the range of 0.1 ms

to 1 second as defined by the fault-detect recovery constant register (FDRC registers 0x3C-

0x3D), then toggles it back to 1. This sequence is repeated as long as the fault indication

exists. This feature is enabled by default but can be bypassed by setting the FDRB control

bit to 1.

6.14

Configuration register B (addr 0x12)

6.14.1

Serial data interface

The STA381BW audio serial input was designed to interface with standard digital audio

components and to accept a number of serial data formats. The STA381BW always acts as

the slave when receiving audio input from standard digital audio components. Serial data for

two channels is provided using three inputs: left/right clock LRCKI, serial clock BICKI, and

serial data 1 and 2 SDI12.

The SAI bits (D3 to D0) and the SAIFB bit (D4) are used to specify the serial data format.

The default serial data format is I2S, MSB-first. Available formats are shown in the tables

that follow.

C2IM

C1IM

DSCKE

SAIFB

SAI3

SAI2

SAI1

SAI0

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