SAGEMCOM HiLoV2 Operational Description

Operational Description of HiLoV2 module

1. Block diagram

2. Functional description

2.1 Power supply system

The power supply system includes: VBAT, VGPIO, VBACKUP, Reset and Power
control (POK_IN signal, RF burst indicator signal).

The VBAT is the power supply for the module. Its range is from 3.2V to 4.5V.

The VGPIO is the power supply output from the module. It is supplied for external
circuits and its rated value is 2.8V.

The VBACKUP is the power supply of backup battery. It should be connected to a
backup battery. If no backup battery is provided, a 10uF capacitor should be
connected between VBACKUP and GND.

The reset signal is used to reset the whole module as the requirement.

The POK_IN signal is used for powering up the module. When this signal is pulled
down for a few seconds, the module will be powered up.

The RF burst indicator signal is used for indicating the RF burst. When the RF burst
comes, it will be in high voltage level. Otherwise, it will be in low voltage leve.

2.2 RF subsystem

The RF subsystem includes: internal RF circuit, one antenna connector and two
antenna pads.

The internal RF circuit is inside the module and works for RF communication.

The antenna connector is used for the connection between the module and external
antenna.

The two antenna pads are also used for the connection between the module and
external antenna.

The antenna connector and antenna pads can not be used at the same time.

2.3 EMC subsystem

The EMC subsystem is inside the module and used for reading and writing system
data.