ADC 6021 Dokumentacja Pobierz pdf (Strona 93)

MYXPM6021*

Revision 1.1 - 10/21/14

*Advanced information. Subject to change without notice.

MYXPM6021*

Form #: CSI-D-685 Document 011

18 Power Button & Utility Button

18.1 Overview

Thesystemhastwobuttonsthatcanbeusedtogethertotriggerthesystemtopower“on”or“off”indifferentways.

Themainpowerbutton(PWRBTNIN_B)isanactive-lowinputwithaninternalpull-upresistortoVSYS.

ThesecondbuttonistheUtilitybuttonoruserinterfacebutton(UIbutton,UIBTN_B).Thisbuttonistypicallyusedasa

homebuttonandalsoincludesthepull-upresistortoVSYS.

Bothbuttonsarede-bouncedwitha30mslterandsupervisedbyatimerunitmeasuringthepulselength.

18.2 Power/Utility Button Block Diagram

Figure 40: Power/Utility Button Detection Logic

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 112 113

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ADC 6021 Dokumentacja Strona 93