User's Manual

TiWi5TRANSCEIVERMODULE
DATASHEET
The information in this document is subject to change without notice.
330‐0042‐R2.3  Copyright©2011‐2016 Page19of46
WLANPOWER‐UPSEQUENCE
Thefollowingsequencedescribesdevicepower‐upfromshutdown.OnlytheWLANCoreisenabled;the
BluetoothandFMcoresaredisabled.
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Figure3TiWi5Power‐upSequenceRequirements
1. NosignalsareallowedontheIOpinsifnoIOpowerissupplied,becausetheIOsarenot'failsafe’.Exceptions
areCLK_REQ_OUT,SLOWCLK,XTALP,andAUD_xxx,whicharefailsafeandcantolerateexternalvoltageswith
noVDDSandDC2DC.
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2. VBAT,VIO,andSLOWCLKmustbeavailablebeforeWL_EN.
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3. T
wakeup =T1+T2
ThedurationofT1isdefinedasthetimefromWL_EN=highuntilFrefisvalidfortheSoC.T1=~55ms
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ThedurationofT2dependson:
–Operatingsystem
–HostenumerationfortheSDIO/WSPI
–PLLconfiguration
–Firmwaredownload
–Releasingthecorefromreset