STA381BW datasheet(68/174 Pages) STMICROELECTRONICS

tên linh kiện	STA381BW

Giải thích chi tiết về linh kiện	Sound Terminal® 2.1-channel high-efficiency digital audio system

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STA381BW

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DocID018835 Rev 8

6.17.3

PWM speed mode

6.17.4

Zero-crossing enable

The ZCE bit enables zero-crossing adjustment. When volume is adjusted on digital zero-

crossing, no clicks are audible

6.18

Configuration register F (addr 0x16)

6.18.1

Invalid input detect mute enable

Setting the IDE bit enables this function, which looks at the input I2S data and automatically

mutes if the signals are perceived as invalid.

6.18.2

Binary output mode clock loss detection

This bit detects loss of input MCLK in binary mode and will output 50% duty cycle.

Table 46. PWM speed mode

Bit

R/W

RST

Name

Description

R/W

PWMS

0: Normal speed (384 kHz) all channels

1: Odd speed (341.3 kHz) all channels. Not suitable for

binary BTL mode.

Table 47. Zero-crossing enable

Bit

R/W

RST

Name

Description

R/W

ZCE

1: Volume adjustment only occurs at digital zero-crossing

0: Volume adjustment occur immediately

EAPD

PWDN

Reserved

LDTE

BCLE

IDE

Reserved

010111

Table 48. Invalid input detect mute enable

Bit

R/W

RST

Name

Description

R/W

IDE

Setting of 1 enables the automatic invalid input

detect mute

Table 49. Binary output mode clock loss detection

Bit

R/W

RST

Name

Description

R/W

BCLE

Binary output mode clock loss detection enable

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