Motorola G24 - Operating Modes

Chapter 2: Hardware Interface Description
January 1, 2006 Module Hardware Description 9
Operating Modes
G24 incorporates several operating modes. Each operating mode is different in the active features
and interfaces.
Table 2-1 summarizes the general characteristics of the G24 operating modes and provides
general guidelines for operation.
Table 2-1:
G24 Operating Modes
Mode Description Features
Not Powered VCC supply is disconnected. The G24 is Off.
Any signals connected to the interface con-
nector must be set low or tri-state.
RTC Mode Valid VCC supply.
RESET_N signal is enabled (low).
The G24 interface is Off.
The PMIC is operating in RTC mode.
Any signals connected to the interface con-
nector must be set low or tri-state.
Idle Mode RESET_N signal is disabled (high).
CTS_N and DSR_N signals are enabled
(low).
The G24 is fully active, registered to the
GSM network and ready to communicate.
This is the default power-up mode.
Sleep Mode RESET_N signal is high.
CTS_N signal is disabled.
The G24 is in low power mode.
The application interfaces are disabled, but,
G24 continues to monitor the GSM network.
CSD call or
GPRS data
RESET_N signal is high.
TXEN_N signal is toggling.
A GSM voice or data call is in progress.When
the call terminates, G24 returns to the last
operating state (Idle or Sleep).