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BATT voltage A/D inside
3.1.3 GSM Transceiver Block
3 gain stages for the low GSM band and high GSM band
850/900/1800/1900 MHz
RF receiver, which includes LNAs, Mixers, VCOs, I/Q outputs and buffers.
Signal processing IC for transmit and receive GSM data processing.
FEM - Front End Module.
Includes a harmonic filter and antenna switch
Filter - Dual-band SAW filter that selects the required receive band.
3.2 Operating Modes
The G610 incorporates several operating modes. Each operating mode is different in the active
features and interfaces.
The table summarizes the general characteristics of the G610 operating modes and provides
general guidelines for operation.
Operating
Modes
Not Powered
Power
off
Mode
RTC Mode
Idle Mode
G610 GPRS Module Hardware User Manual
Description
BATT & Vbackup supply is
disconnected.
Valid BATT supply but not
power on.
After reset module. Vbackup
output and VDD is off.
Power off mode
BATT
supply
disconnected.
But
Vbackup supply
Power on is succeeded and
VDD output.
CTS_N and DSR_N signals
are enabled (low).
The G610 is off.
Any signals connected to the interface
connector must be set low or tri-state.
The G610 MCU/DSP/RF is Off.
The PMU is operating in RTC mode.
Any signals connected to the interface
connector must be set low or tri-state.
The G610 MCU/DSP/RF is Off.
is
The PMU is operating in RTC mode.
valid
Any signals connected to the interface
connector must be set low or tri-state.
The G610 is fully active, registered to the
GSM/GPRS
communicate.
This is the default power-on
Features
network
and
ready
mode.
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