Specifications

COMPANY CONFIDENTIAL

1.5.4 USB3.0 interface

T77W968 module is compliant with USB3.0 in all modes. When two devices are connected

via a USB3.0 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 1-3 USB3.0 interface.

1. Reserve choke on all the USB signals in platform for noise debug.

2. Reserve 0.1uF capacitor on USB3.0 TX/Rx paths.

3. Co-layout USB3 choke and 0.1uF capacitor on module side for noise debug

Notes: All the above components should be covered by shielding cover.

Remark:

USB configuration the module supports

Win7: DIAG, RmNet, Modem, NMEA

Win10: MBIM, GNSS

Linux: DIAG, RmNet, Modem, NMEA

1.5.5 W_DISABLE#

This control setting is implementation-specific and represents the collective intention of the

host software to manage radio operation. T77W968 provides a hardware pin (W_DISABLE#)

to disable or enable the radio. Besides, the radio can also be enabled or disabled through

software AT commands.

Item State Function (WWAN state)

W_DISABLE#1

Low WWAN Disabled (no RF operation allowed)

High WWAN Enabled (RF operation allowed), internally pull up

W_DISABLE#2

Low GPS Disabled (no RF operation allowed)

High GPS Enabled (RF operation allowed), internally pull up

Note: W_Disable# is connected to configurable GPIO pin from PMIC, which can support

either 3.3V VIO or 1.8V VIO. The default configuration is 3.3V VIO with interrupt function (low

active), 1.8V will not disable RF function.

T77W968C9