WM8960CGEFLSLASHV datasheet(45/94 Pages) CIRRUS

45 / 94 page

WM8960

Rev 4.4

VOLUME UPDATES

Volume settings will not be applied to input or output PGAs until a '1' is written to one of the update

bits (IPVU, OUT1VU, SPKVU bits). This is to allow left and right channels to be updated at the same

time, as shown in Figure 16.

Write Left

Volume

Update

bit = 0

Write

Right

Volume

Update

bit = 1

Left PGA Input

Right PGA Input

Control Interface

Time

Left PGA Output

Right PGA Output

Write Left PGA Volume

without update

Write Right PGA Volume

with update

0dB Gain

6dB Gain

Left and right channels

updated at same time

Figure 16 Simultaneous Left and Right Volume Updates

If the volume is adjusted while the signal is a non-zero value, an audible click can occur as shown in

Figure 17.

Write Left

Volume

Update

bit = 0

Write

Right

Volume

Update

bit = 1

Left PGA Input

Right PGA Input

Control Interface

Time

Left PGA Output

Right PGA Output

Write Right PGA Volume

with update

Write Left PGA Volume

without update

0dB Gain

6dB Gain

Click

Noise

Figure 17 Click Noise during Volume Update

WM8960CGEFL/V Datasheet(PDF) 45 Page - Cirrus Logic

WM8960CGEFL/V Datasheet(HTML) 45 Page - Cirrus Logic

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