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22of46
BLUETOOTHPOWER‐UPSEQUENCE
Thefollowingsequencedescribesdevicepowerupfromshutdown.OnlytheBluetoothcoreisenabled;theWLAN
coreisdisabled.
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Notes:
1. (A)Afterthissequenceiscompleted,thedeviceisinthelowVIO‐leakagestatewhileinshutdown
2. TheDC2DC(1.8V)signalcanbemonitoredonBT_FUNC2ModulePin(#41)
3. DC_REQ,CLK_REQ,andF
REF
areinternalsignalsshownforreferenceonly
Figure5BluetoothPower‐upSequence
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Poweruprequirements:
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1. NosignalsareallowedontheIOpinsifnoIOpower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. VDDSandSLOWCLKmustbestablebeforereleasingBT_EN.
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3. Fastclockmustbestablemaximum55msafterBT_ENgoesHIGH.
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