User Manual

G610 GPRS Module Hardware User Manual Page 32 of 47
G610 Pin# G610 Signal name Description
9 VDD
LDO power output
Illustrating module start up
49 LPG Module work status indicator
7 RESET_N
Extend reset module
Low level activated
3.11.1 VDD Reference Regulator
The G610 incorporates a regulated voltage output VDD. The regulator provides a 2.85V output
for use by the customer application. This regulator can source up to 30 mA of current to power any
external digital circuits.
When the G610 started up by power on signal, The VDD is output. So it can be Illustrating
module start up.
Important: The VDD regulator is powered from the G610's main power supply, and therefore
any current sourced through this regulator originates from the G610 BATT supply. The overall BATT
current consumed by G610 is directly affected by the VDD operation. The G610 current
consumption raises with respect to the current sourced through VDD.
Parameter Conditions Min Typ Max Unit
Vout Iout=30mA -3% 2.85 3% V
Iout 10 30 mA
Imax
Current pulled down from LDO
to GND until LDO voltage is
50% of nominal value
150 mA
External
Capacitor
-35% 1 35% uF
PSRR 50 Hz - 20 kHz 35 dB
3.11.2 External Reset
The RESET_N input signal would be power off the G610 immediately. This signal is set high
after power up, when G610 is operating. It is set low when G610 is powered off.
When the RESET_N signal is low, the G610 is powered off without the work net logging out.
Important: It’s recommended that it should connect he 1nF capacitor to GND on external