3G debbug

IoT Modules Legacy HL Series
1

Hi,

the 3G module (HL8548) is powerd by 3.7v , I have not found the voltage at the pin VGPIO (1.8v)

best regards

2

Hi,
are you using any Dev kit? how are you checking? which pin are you referring?

3

Hi,
I used 3G HL8548 module in a project.
the 3G module is powerd by 3.7 v. The PWR_ON (pin 59 in HL8548) has an internal pull-up, so it is supposed to find it at 1.8V. I checked PIn 59, it’s at low state . We try the power up sequence in page 44 of the Product Technical Specification for HL8548 but no signal in VGPIO (pin 45) is detected.