User Manual

XR‐21A WIFI
module
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3.2 Wi-Fi RF characteristic
Description Min Typ. Max Unit
CentralFreq.  2412 - 
 2462
 MHz
Enterreflectionvalue -  -   -10  dB
TransmitPower
CCK,1Mbps 17.08 17.48 - dBm
CCK,11Mbps  16.74 17.03  - dBm
6MbpsOFDM 16.89 17.36 - dBm
54MbpsOFDM 14.91 15.15 - dBm
HT20,MCS0 15.50 16.02 - dBm
HT20,MCS7 14.01 15.10 - dBm
V
IH
 VCC_IO=3.3V 2.06 - 3.6 V
V
OL

VCC_IO=3.3V,
|IOL|=7.5~50mA
-0.3 - 0.4 V
V
OH

VCC_IO=3.3V,
|IOL|=7.5~50mA
2.9 - 3.4 V
I
MAX
- --12mA