Integration Guide

Enfora Enabler III LPP
Integration Guide Page 25 Revision: 0.00
high. Once the transition from low to high is complete, the micro-controller will
boot. The Reset signal is falling edge triggered, so the reset function is set
immediately when the signal is pulled low.
When using Reset, it will immediately lose the connection to the GSM network, this
is not considered ideal. Typically during a normal shutdown, the module will issue a
detach request to the network to indicate that it is being removed.
Parameter
Parameter/Conditions
Vcc
MIN
TYP
MAX
UNIT
V
IL
Input Voltage – Low or float 2.2V Vss Vss+0.6 Vdc
V
IH
Input Voltage – High 2.2V 0.8*Vcc Vcc Vdc
Reset Pulse
Duration
2 µS
5.4.7 USB (PINS 34, 35, 36)
Note: USB is used for software upgrades, modem configuration, and
Enfora debug. Use this interface for local connection upgrades.
Alternatively, FOTA can be used to upgrade the module software..
5
V
T
o
l
USB
Parameter/Conditions
Min
Typ
Max
Units
Input Voltage 4.4 4.65 5.25 V
Output voltage High (Driven) 2.8 3.3 3.6 Vdc
Low 0.0 0.1 0.3 Vdc
Transceiver D+/-
Leakage Current
-2
2
μA
Pin Name
Pin Number
Signal Direction
Description
USB_VBUS 36 In 5 V tolerant power Supply VBUS line;
Used only as a USB sense, not for
powering the module. (optional
connection)
USB_DP 35 Analog I/O 5 V tolerant data plus pin in USB
USB_DM 34 Analog I/O 5 V tolerant data minus pin in USB