User's Manual

15
1.4.3 Full_Card_Power_Off
The M.2 LTE module can be controlled to power on/off by the Full_Card_Power_Of pin.
Item State M.2 card state
1 Low Powers off, It’s internally pulled down by 100K ohm resistor
2 High Powers on, it is 3.3V tolerant but can be driven by either 1.8V or
3.3V GPIO.
The recommended connections as below
1.4.4 USB interface
T77H468 module is compliant with USB2.0 in all three modes (Low speed, Full speed, and
high speed). When two devices are connected via a USB interface, one of the devices must
act as a host, and the other device must act as a peripheral. The host is responsible for
initiating and controlling traffic on the bus.
Figure 1-4-4 USB2.0 interface