Datasheet

DIY IOT Electronics and Solutions
IOT-BOTS.COM LLC IBT-QTC-BG9X-AMC-DS Rev. 1.1 7
Shield supports nano-SIM card to be inserted into Hinged Lid SIM Card Holder type
located at the top of PCB. All SIM-card traces are ESD-protected.
Network indication LED, located in the center of the edge of the board lets observe
modem network status.
TPS63020 Buck-Boost Converter is used to power modem, so shield is fully
functional even with input voltage drops down to 3.3 V.
DC/DC output voltage is also used to power LDO, which provides 3,3 VDC for the
level translators, Open-Drain (OD) logic IC and active GNSS antenna to be
connected.
Level translators are used to shift voltage levels between IOT board with 3,3V
signals and 1,8V levels used by modem logic.
All qTop Shields have device ID feature - each qTop shield has integrated EEPROM
chip with UID feature. EEPROM is preprogrammed by manufacture (IOT-
BOTS.COM) with shield type and info, so IOT controller with appropriate FW
loaded, at power up time could identify type of the shield and configures FW to
work with. So, no needs to re-flash IOT controller with new FW if you want to
change shield, for example, to change wireless connectivity from LTE to LoRa : just
turn power off, replace a shield and turn power on - system will recognize new HW
plugged in and start working with that device. UID feature could be used by End
User as particular device identification (for sure, IMEI could be used as well) or to
keep a small piece of data (device settings, as example).
OD logic is simple gate IC, used to convert push-pull RI modem signal to open-drain
logic to be compatible with Q_INT line of qJam interface - so many different devices
(sensors, actuators, modems, etc) interrupt outputs could be connected to single
line to be used by IOT controller to react on system or external events.
And finally, to bring more value for our qTop products, each qTop shield (except
GNSS shields) supports qJam connection system : it is developed by our team, tiny
6-pin connecting system, which allows end user to easily bring small I2C devices
(sensors, actuators, system devices, memories) to an IOT solution to be developed.
Need just put qJam compatible device into qJam connector of the controller board
- no cables, soldering or wires required. It has power (3,3V), I2C bus, Q_INT open-