STA323W datasheet(44/71 Pages) STMICROELECTRONICS

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STA323W

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7.6.4

PWM speed mode

7.6.5

Zero-crossing volume enable

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

zero-crossings no clicks are audible.

7.6.6

Soft volume update enable

The STA323W includes a soft volume algorithm that steps through the intermediate volume

values at a predetermined rate when a volume change occurs. By setting SVE=0 this can be

bypassed and volume changes will jump from the old to the new value directly. This feature

is available only if individual channel volume bypass bit is set to 0.

Table 39.

PWM speed mode

Bit

R/W

RST

Name

Description

R/W

PWMS

Normal or odd

Table 40.

PWM output speed selections

PWMS (1...0)

PWM output speed

Normal speed (384kHz) all channels

Odd speed (341.3kHz) all channels

Table 41.

Zero-crossing volume enable

Bit

R/W

RST

Name

Description

6R/W

ZCE

1: volume adjustments will only occur at digital zero-

crossings

0: volume adjustments will occur immediately

Table 42.

Soft volume update enable

Bit

R/W

RST

Name

Description

R/W

SVE

1: volume adjustments will use soft volume

0: volume adjustments will occur immediately

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