WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 63

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
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ZERO CROSS TIMEOUT
Table 45 Timeout Clock Enable Control
OUT3/OUT4 MIXERS AND OUTPUT STAGES
Figure 31 OUT3 and OUT4 Mixers
A zero-cross timeout function is also provided so that if zero cross is enabled on the input or output
PGAs the gain will automatically update after a timeout period if a zero cross has not occurred. This
is enabled by setting SLOWCLKEN. The timeout period is dependent on the clock input to the digital
and is equal to 2
The OUT3/OUT4 pins can provide an additional stereo line output, a mono output, or a pseudo
ground connection for headphones. There is a dedicated analogue mixer for OUT3 and one for
OUT4 as shown in Figure 31.
The OUT3 and OUT4 output stages are powered from SPKVDD and SPKGND. The individually
controllable outputs also incorporate an optional 1.5x boost and level shifting stage.
R7
Additional
Control
REGISTER
ADDRESS
21
* input clock period.
0
BIT
SLOWCLKEN
LABEL
0
DEFAULT
Slow clock enable. Used for both the
jack insert detect debounce circuit and
the zero cross timeout.
0 = slow clock disabled
1 = slow clock enabled
DESCRIPTION
PP, Rev 3.8, May 2012
WM8980
63