WM8775
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POWER-ON-RESET
The WM8775 has an internal power-on-reset circuit. The reset phase is entered at power-up of
supplies. The ADC DSP circuitry is also reset when their respective master clocks are stopped.
Register values are maintained unless either a power-on-reset occurs or a software reset is written.
A software reset will also cause a reset of the ADC DSP.
Figure 8 shows the power-on-reset logic, and Figure 9 shows the reset release characteristics.
Figure 8 Circuit Diagram for Power-on-Reset
Figure 9 Timing Diagram for Power on Sequence
PP Rev 1.8, June 2004
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