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WM9713 数据表(PDF) 76 Page - Wolfson Microelectronics plc |
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WM9713 数据表(HTML) 76 Page - Wolfson Microelectronics plc |
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76 / 111 page  WM9713L Preliminary Technical Data 1 PTD, March 2004, Rev 2.2 76 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 WM9713L 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 If COMP2 is no longer active, the GPIO bit is not set, i.e. all register bits are as if COMP2 had never triggered. 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 26 COMP2 Delay Flow Chart |
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