STA381BWS datasheet(59/171 Pages) STMICROELECTRONICS

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STA381BWS

Doc ID 018937 Rev 6

59/171

The on-chip STA381BWS 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 STA381BWS audio serial input was designed to interface with standard digital audio

components and to accept a number of serial data formats. The STA381BWS 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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