TC65 Hardware Interface Description
Strictly confidential / Draft
s
TC65_HD_V00.521
Page 22 of 99
24.05.2005
3.1 Operating
Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
Table 1: Overview of operating modes
GSM / GPRS SLEEP Various power save modes set with AT+CFUN
command.
Software is active to minimum extent. If the module was
registered to the GSM network in IDLE mode, it is
registered and paging with the BTS in SLEEP mode,
too. Power saving can be chosen at different levels:
The NON-CYCLIC SLEEP mode (AT+CFUN=0)
disables the AT interface. The CYCLIC SLEEP modes
AT+CFUN=7 and 9 alternatively activate and deactivate
the AT interfaces to allow permanent access to all AT
commands.
GSM
IDLE
Software is active. Once registered to the GSM
network, paging with BTS is carried out. The module is
ready to send and receive.
GSM TALK
Connection between two subscribers is in progress.
Power consumption depends on network coverage
individual settings, such as DTX off/on, FR/EFR/HR,
hopping sequences, antenna.
GPRS IDLE
Module is ready for GPRS data transfer, but no data is
currently sent or received. Power consumption depends
on network settings and GPRS configuration (e.g.
multislot settings).
Normal operation
GPRS DATA
GPRS data transfer in progress. Power consumption
depends on network settings (e.g. power control level),
uplink / downlink data rates, GPRS configuration (e.g.
used multislot settings) and reduction of maximum
output power.
POWER DOWN
Normal shutdown after sending the AT^SMSO command.
The Power Supply disconnects the supply voltage from the baseband part of
the circuit. Only a voltage regulator is active for powering the RTC. Software is
not active. Interfaces are not accessible.
Operating voltage (connected to BATT+) remains applied.