Specifications

COMPANY CONFIDENTIAL
12
1.4 Platform connection design
1.5.1 Configuration Pins
The M.2 module provides 4 configuration pins. T77W968 is configured as WWAN-USB3.0- 0,
refer to PCIe M.2_Rev 1.1.
Item Module configuration decodes Module type Port configuration
Config Config_0 Config_1 Config_2 Config_3
WWAN-USB3.0 0 Pin No. 21 69 75 1
State GND GND GND NC
1.5.2 Power and ground
(1) Power Rail Parameters
Parameter Min Type Max Units
Operating voltage 3.135 3.3 4.4 Vdc
The operating voltage was defined in PCIe M.2_Rev 1.1 standard as 3.135V~4.4V.
(2) 3.135 V is the minimum voltage supplied to LTE M.2 card by the host platform, and VCC
must never be under 3.135 V in any case. As our experiment, if we set the VCC=3.0V, the
M.2 card will power off possibly when M.2 card working at +23dBm continue mode.
(3) The LTE M.2 module provides 5 power pins and 11 Ground pins. To ensure that the LTE
module works normally, all the pins must be connected.
1.5.3 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
T77W968C9