The HA-Breakout circuit board provides flexible connectivity between your product/project and the LooUQ CTA device of your choosing, such as our LTE CAT-M1 IoT modem.


The HA-Breakout provides a standard 3.7/4.2 volt LiPo battery charger/manager circuit that provides power to the CTA device. Additionally, the HA-Breakout provides standard breadpoint spaced project connections via a 2.54mm (0.1 inch) pitch header connector or via a cable connection. Both straight-thru and right-angled headers are included in the kit to allow for easy breadboard configurations.


The CTA physical connection is completed by inserting the CTA on to the right-angled CTA connector, then pushing the CTA down on to the two snap-guides located at the top of the board.  See the video below for a demonstration of this process.




Breakout/Breadboard Header Connections

Pin Label
Direction
Description
5V
CTA In
Power in; tied to the V-BUS pin of the micro-USB connector.  Should not exceed 6 volts.
GND
CTA In
Power and signal ground
MOSI
CTA In
SPI bus Master-Out, Slave-In communications channel
MISO
CTA Out
SPI bus Master-In, Slave-Out communications channel
~CS
CTA In
SPI bus chip-select (also referred to as slave-select)
CLK
CTA In
SPI bus clock signal
~IRQ
CTA Out
Interrupt request, signals that an interrupt condition should be serviced
AuxTx
CTA In
Auxiliary or secondary data stream, UART data transmit (host to CTA)
AuxRx
CTA Out
Auxiliary or secondary data stream, UART data receive (CTA to host)
PwrKey
CTA In
Pulsed signal to toggle CTA power, see CTA for timing requirements
Reset
CTA In
Pulsed signal to reset CTA
Sleep
CTA In
Control signal to hold CTA in sleep (power conservation) state
Status
CTA Out
Status signal indicates that the CTA is powered on and in a ready state
Conn
CTA Out
Connected signal indicates that the CTA has established a connection and is data transmit ready
Event
CTA Out
New event ready signal, indicates that the CTA has a recent change (see CTA documentation for specifics)

Note: Pin labels prefixed with ~ indicate that the signal is active low.


Additional Connectors

Function
Description
USB (power-in)
Optional method to power the HA-Breakout and CTA.  USB VBUS pin is tied directly to the 5V header pin.
Battery
JST PH-2 style LiPo battery connector.  Some CTA devices, such as the LooUQ LTEM1 IoT modem require a LiPo battery connection to support temporary spikes in power demand.

Note: LiPo capacity of at least 1200 mAh are recommended based on the configured charge rate of 505mA (2C).
GNSS Antenna Power
Power for active GNSS antennas (3v-5v, typically 8-18mA). Not used for passive GNSS/GPS antennas.
- J6 Sourced from 5V/USB (left)
- J3 Sourced from battery (right)

Upper pin - Ground, Lower pin - Power

    

Active GNSS Power Source