User Manual

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XR‐21A WIFI module
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Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved 
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Table2.3  Startmode
mode RST PB2 PB3
Download
rising
edge
low low
Run
rising
edge
low high
high low
high high
Notice:PB2andPB3hadbeenpulledupinmodule,modulehasself-reset
function
3.Electricalparameters
3.1Electrical characteristics
parameter testcondition min typ max unit
Storage 
Temp.
- -55 normal 150 ℃
Worktemp. - -40 20 85 ℃
Maxwelding
temp.
IPC/JEDECJ-STD-020 - - 260 ℃
Supplyvolt. VCC 2.7 3.3/5 5.5 V
I/O V
IL
 VCC_IO=3.3V -0.3 - 1.32 V