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25of46
SLOW(32KHZ)CLOCKSOURCEREQUIREMENTS
Theslowclockisalwayssuppliedfromanexternalsource.ItisinputontheSLOW_CLKpin,andcanbeadigitalsignalinthe
rangeofVIOonly.ForslowclockfrequencyandaccuracyrefertoTable19.Theexternalslowclockmustbestablebefore
thesystemexitsfromshutdownmode.
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Parameter[1] Condition Symbol Min Typ Max Unit
Inputslowclockfrequency 32768 Hz
Inputslowclockaccuracy WLAN,B
T
 +/‐250 ppm
InputtransitiontimeT
r
/T
f
–10%to90% T
r
/T
f
100ns
Frequencyinputdutycycle 30 50 70 %
Inputvoltagelimits
Squarewave,
DCcoupled
VIH
0.65xVDDS  VDDS V
peak

VIL 0 0.35xVDDS 
Inputimpedance 1  MW
Inputcapacitance 5pF
Riseandfalltime 100ns
Phasenoise 1kHz ‐125 dBc/Hz
[1]Slowclockisafailsafeinput
Table19SlowClockSourceRequirements
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