![Quectel M10 Скачать руководство пользователя страница 22](http://html1.mh-extra.com/html/quectel/m10/m10_hardware-description_3584769022.webp)
M10 Hardware Design
message and SMS from the system normally.
GSM IDLE
Software is active. The module has registered to the GSM
network, and the module is ready to send and receive.
GSM TALK
Connection is going on between two subscribers. In this case,
the power consumption depends on network settings such as
DTX off/on, FR/EFR/HR, hopping sequences.
GPRS
STANDBY
The module is ready for GPRS data transfer, but no data is
currently sent or received. In this case, power consumption
depends on network settings and GPRS configuration.
GPRS DATA There is GPRS data in transfer (PPP or TCP or UDP). In this
case, power consumption is related with network settings (e.g.
power control level), uplink / downlink data rates and GPRS
configuration (e.g. used multi-slot settings).
POWER DOWN
Normal shutdown by sending the “AT+QPOWD=1” command, using the
PWRKEY or using the EMERG_OFF
①
. The power management ASIC
disconnects the power supply from the base band part of the module, and only
the power supply for the RTC is remained. Software is not active. The serial
interfaces are not accessible. Operating voltage (connected to VBAT) remains
applied.
Minimum
functionality
mode (without
remove power
supply)
Use the “AT+CFUN” command can set the module to a minimum functionality
mode without remove the power supply. In this case, the RF part of the module
will not work or the SIM card will not be accessible, or both RF part and SIM
card will be closed all, and the serial interface is still accessible. The power
consumption in this case is very low.
Alarm mode
RTC alert function launches this restricted operation while the module is in
POWER DOWN mode. The module will not be registered to GSM network and
only parts of AT commands can be available.
①
Use the EMERG_OFF only when, due to serious problems. Please refer to chapter3.4.2.4.
3.3 Power supply
The power supply of module is from a single voltage source of VBAT= 3.4V...4.5V. In some case,
the ripple in a transmitting burst may cause voltage drops when current consumption rise to
typical peaks of 2A. So the power supply must be able to provide sufficient current up to 2A.For
the VBAT input, a local bypass capacitor is recommended. A capacitor (about 100 µF, low ESR)
is recommended. Multi-layer ceramic chip (MLCC) capacitors can provide the best combination
of low ESR and small size but may not be cost effective. A lower cost choice may be a 100 µF
tantalum capacitor (low ESR) with a small (0.1µF to 1µF) ceramic in parallel, which is illustrated
as following figure. The capacitors should put as close as possible to the M10 VBAT pins. The
following figure is the recommended circuit.
M10_HD_V1.00
- 21 -
Quectel