WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 32

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8985
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VOLUME UPDATES
Figure 13 Simultaneous Left and Right Volume Updates
Figure 14 Click Noise during Volume Update
Volume settings will not be applied to the PGAs until a '1' is written to one of the INPPGAVU bits.
This is to allow left and right channels to be updated at the same time, as shown in Figure 13.
If the volume is adjusted while the signal is a non-zero value, an audible click can occur as shown in
Figure 14.
In order to prevent this click noise, a zero cross function is provided. When enabled, this will cause
the PGA volume to update only when a zero crossing occurs, minimising click noise as shown in
Figure 15.
PD, Rev 4.6, July 2009
Production Data
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