User's Manual

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W
LAN/BT System Integration Manual
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3.1.2Layoutchecklist
Thefollowingarethemostimportantpointsforasimplelayoutcheck:
□ Check50ΩimpedanceofANTline(WLAN_RF,BT_RF).
□ Followtherecommendationsoftheantenna producerforcorrectantennainstallationand
deployment.
□ Ensurenocouplingoccurswithothernoisyorsensitivesignals.
□ VCCline(VCC_3V3,VCC_VIO_X1,VCC_VIO_X2)shouldbewideandshort.
□ RouteVCCsupplylineawayfromsensitiveanalogsignals.
□ Ensurepropergrounding.
□ OptimizeplacementforminimumlengthofRFlineandcloserpathfromDCsourceforVCC.
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3.2DesignGuidelinesforLayout
ThefollowingdesignguidelinesmustbemetforoptimalintegrationofWLAN+BTmodulesonthefinal
applicationboard.
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3.2.1Layoutguidelinesperpinfunction
 Thissectiongroupsthemodulepinsbysignalfunctionandprovidesarankingofimportancein
layoutdesign.
UART_TX GND GND GND UART_RX
S D_DATA[2 ]
45
GND GND VCC_1V8
28
GND GND GND
GND
BT_ RF
WLAN_RF
BT_P CM_ DI N
BT_ PCM_CLK
BT_PCM_DOUT BT_PCM_SY NC
1
GND
VCC_VIO_X2
GND
JTAG_TCK
JTAG_TDI
JTAG_TRSTn
JTAG _TMS_S YS
JTAG_TDO
18
S D_DATA[3 ]
40 3035
S D_DATA[0 ]
UART_RTS
SD_DATA[1] SD_CMD
SD_CLK
VCC_3V3 VCC_3V3 VCC_3V0
VCC_VIO_X1
GND
GND
GND
27
VCC_3V3
VCC_3V3
VCC_WLAN_ANT_DIAG
GND
WLAN_ANT_DIAG
25
20
19
51015
SLEEP_ CLK
ANT_SEL _P
RESETn
46
VCC_BT_ANT_DIAG
UART_CTS
BT _ANT_ DIAG
50
54
JTAG_TMS_CPU
NC
ANT_SEL _N
Very Important
Car eful Layout
Common Practice
Legend :
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Figure3‐1:Modulepin‐outwithhighlightedfunctions