Wavenet Technology Pty Ltd. BM3900M Manuel D’Utilisation
Boomer-III User Manual & Integrator’s Guide_________________________________________________Installation
BM310012WT05
45
Copyright Wavenet Technology © October 2003
Power Control
The host/terminal provides the supply rail (HOST 3.8V) to the modem
through the Data Interface Connector.
The host/terminal turns the modem ON by asserting the
HOSTPWR_ON signal.
The host/terminal may request the modem to turn OFF by de-asserting
the HOSTPWR _ON or by sending a specific MASC command across
the serial interface. For the modem to turn OFF after a MASC request
the HOSTPWR_ON signal must be de-asserted.
The host/terminal provides the supply rail (HOST 3.8V) to the modem
through the Data Interface Connector.
The host/terminal turns the modem ON by asserting the
HOSTPWR_ON signal.
The host/terminal may request the modem to turn OFF by de-asserting
the HOSTPWR _ON or by sending a specific MASC command across
the serial interface. For the modem to turn OFF after a MASC request
the HOSTPWR_ON signal must be de-asserted.
Power-Up Sequence
Reference should be made to the Power-UP Timing Diagram below
when reading the following Power-UP Sequence description.
To turn the modem ON, power must be applied (HOST 3.8V) and the
host/terminal asserts the HOSTPWR_ON signal.
The modem contains an internal voltage detector and reset delay circuit
to generate a reset signal for the CPU to ensure orderly and reliable
software initialisation.
An externally controllable reset signal (HCRESET) is optionally
available if the host/terminal wants reset synchronisation or to force a
modem reset while power is still applied.
If the HCRESET signal is used, once it is de-asserted the modem CPU
will be able to initialise.
Once out of reset the first operation is the boot-up of the modem CPU.
At this time CTS is momentarily asserted, then de-asserted. After a
successful boot up, the CPU starts the modem initialisation sequence.
After the initialisation sequence, the Native Mode interface and the
serial interface are active.
Following successful initialisation, the modem asserts DSR and
performs the initialisation protocols for both the DTE interface and the
RF network. After successfully initialising the DTE interface, the
modem asserts CTS. After the network ACK of the registration
sequence, DCD is asserted.
The Boomer-III modem is fitted with a Real Time Clock that third
party applications may utilise to wake-up the modem at a pre-
programmed alarm time prior to turning the modem off. This facility
may be utilised to further reduce current consumption in battery
powered applications, but note that the modem will need to re-register
on the network after wake-up
Reference should be made to the Power-UP Timing Diagram below
when reading the following Power-UP Sequence description.
To turn the modem ON, power must be applied (HOST 3.8V) and the
host/terminal asserts the HOSTPWR_ON signal.
The modem contains an internal voltage detector and reset delay circuit
to generate a reset signal for the CPU to ensure orderly and reliable
software initialisation.
An externally controllable reset signal (HCRESET) is optionally
available if the host/terminal wants reset synchronisation or to force a
modem reset while power is still applied.
If the HCRESET signal is used, once it is de-asserted the modem CPU
will be able to initialise.
Once out of reset the first operation is the boot-up of the modem CPU.
At this time CTS is momentarily asserted, then de-asserted. After a
successful boot up, the CPU starts the modem initialisation sequence.
After the initialisation sequence, the Native Mode interface and the
serial interface are active.
Following successful initialisation, the modem asserts DSR and
performs the initialisation protocols for both the DTE interface and the
RF network. After successfully initialising the DTE interface, the
modem asserts CTS. After the network ACK of the registration
sequence, DCD is asserted.
The Boomer-III modem is fitted with a Real Time Clock that third
party applications may utilise to wake-up the modem at a pre-
programmed alarm time prior to turning the modem off. This facility
may be utilised to further reduce current consumption in battery
powered applications, but note that the modem will need to re-register
on the network after wake-up