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0VOff SwitchingSupplyinthemodemthat
powersuptheHuaweimodule.
6 USBD+ I/O‐ThisconnectstotheHuaweimodule.
7 VIN I/O Inputmode:
4.7V–60V
Outputmode:
Powerjackinput
voltage
Ifusingthemodem’spowerjack,header
VINisinoutputmode.Whennotusingan
externalpowercube,VINisininput
mode.SeePowerLinesbelowfordetails.
8 POWER_ON_OFF_NOT I 1.8Vto7VHigh
0Vto.6VLow
ThissignalreachestheHuawei609
throughaninverter.SeeHuawei
HardwareGuide.
9 GPIO2 I/O ThisI/OlinegoesdirectlytotheHuawei
GPIO2line.SeeHuaweiHardwareGuide.
10 GPIO1 I/O

ThisI/OlinegoesdirectlytotheHuawei
GPIO1line.SeeHuaweiHardwareGuide.
11 WAKEUP_IN_NOT I 1.8Vto7VHigh
0Vto.6VLow
ThissignalreachestheHuawei609
throughaninverter.SeeHuawei
HardwareGuide.
12 WAKEUP_OUT_NOT O Highimpedance
 isnormal
0VLow
Outputisopen‐drainoutputofN ‐channel
Mosfetinverter.Pullthisuptoyourlogic’s
supplyvoltagetousethisline.When0
volts,HuaweiWakeup_OutisHigh..
13 Ground
14 N/CNothingconnectstothisline.
15 N/CNothingconnectstothisline.
16 N/CNothingconnectstothisline.
17 N/CNothingconnectstothisline.
18 VMID O 1.8V 
19 N/CNothingconnectstothisline.
20 SLEEP_STATUS_NOT 0 Highimpedance
 Isnormal
0VLow
Outputisopen‐drainoutputofN ‐channel
Mosfetinverter.Pullthisuptoyourlogic’s
supplyvoltagetousethisline.When0
volts,HuaweiSleep_StatusisHigh.
21 GPIO4 I/O 1.8VOn
0VOff
ThisI/OlinegoesdirectlytotheHuawei
GPIO4line.SeeHuaweiHardwareGuide.

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