WM8726 Wolfson Microelectronics plc, WM8726 Datasheet - Page 9

• Manufacturer Part Number: WM8726
• Description: 24-bit 192khz Stereo Dac
• Manufacturer: Wolfson Microelectronics plc

WM8726
POWER ON RESET (POR)
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The WM8726 has an internal power-on-reset (POR) circuit which is used to reset the digital logic
into a default state after power up. A block diagram of the reset circuit is shown in Figure 3
Figure 3 Block Diagram of Power-On-Reset
The active low reset signal NPOR will be asserted low until VDD=2.4V, which means VMID rises
to 1.2V. When this threshold has been reached, then the NPOR is released and the digital
interface has been reset. This is illustrated in the diagram shown in Figure 4.
Figure 4 Generation of Internal NPOR At Power-On-Reset
PD Rev 4.6 May 2008
Production Data
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