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WM9711 Datasheet(PDF) 38 Page - Wolfson Microelectronics plc |
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WM9711 Datasheet(HTML) 38 Page - Wolfson Microelectronics plc |
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38 / 66 page  WM9711L Production Data w PD Rev 4.1 April 2004 38 COMP2 DELAY FUNCTION COMP2 has an optional delay function for use when the input signal is noisy. When COMP2 triggers and the delay is enabled (i.e. COMP2DEL is non-zero), then GPIO bit 14 does not change state immediately, and no interrupt is generated. Instead, the WM9711L starts a delay timer and checks COMP2 again after the delay time has passed. If COMP2 is still active, then the GPIO bit is set and an interrupt may be generated (depending on the state of the GW14 bit). If COMP2 is no longer active, the GPIO bit is not set, i.e. all register bits are as if COMP2 had never triggered. Note: If COMP2 triggers while the WM9711L is in sleep mode, and the delay is enabled, then the device starts the on-chip crystal oscillator in order to count the time delay. COMP2 TRIGGERS START TIMER COMP2? WAIT time=COMP2DEL SHUT DOWN TIMER Inactive Active SET GI14 END END [FALSE ALARM] COMP2 DEL? non-zero C2W? 0 END 1 000 Figure 5 COMP2 Delay Flow Chart |
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Similar Description - WM9711 |
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