Integration Guide

LEON-G100/G200 - System Integration Manual
GSM.G1-HW-09002-F3 Preliminary System description
Page 13 of 101
Operating Mode
Description
Features / Remarks
Transition condition
Connected-Mode
Voice or data call enabled.
Microprocessor runs with 26
MHz as reference oscillator.
Module is ready to accept
data signals from an external
device.
The module is switched on and a voice
call or a data call (GSM/GPRS) is in
progress.
Module is fully active.
Application interfaces are enabled.
When call terminates, module returns to
the last operating state (Idle or Active).
General Status: Charging (LEON-G200 only)
Pre-charge mode
Battery connected to VCC.
Battery voltage level is below
the VCC normal operating
range.
Charger connected to
V_CHARGE and
CHARGE_SENSE inputs with
proper voltage and current
characteristics.
Charging of the deeply
discharged battery is enabled
while the module is switched
off.
Module is switched off and cannot be
switched on (not powered mode).
The Pre-Charge phase of the charging
process is enabled: charging of the
deeply discharged battery is forced by
HW at low current while the module is
switched off
Charge-mode
Battery connected to VCC.
Battery voltage level is within
the VCC normal operating
range.
Charger connected to
V_CHARGE and
CHARGE_SENSE inputs with
proper voltage and current
characteristics.
Charging process enabled
while the module is switched
on and normal operations are
enabled.
Module is switched on and normal
operations are enabled (Idle mode,
Active mode or Connected mode).
The charging process is enabled:
charging of battery is controlled by the
microprocessor while the module is
switched on
Table 2: Module operating modes summary