User's Manual

Installation_________________________________________________ Boomer II User Manual & Integrator’s Guide
Wavenet Technology 48 BM210012WT27
modem's factory loaded individual LLI) increases the percentage of
time the modem stays in the receive state, thereby increasing its overall
current consumption.
Roaming Time
The amount of time the modem spends scanning a channel or roaming
to a new channel will affect the current consumption. The current
consumption is dependant on the Network type (Private or Public) and
the System type (MFR or SFR).
Power Control
The terminal host provides the supply rail (HOST 3.8V) to the modem
through the Data Interface Connector.
The terminal host turns the modem ON by asserting the
HOSTPWR_ON signal.
The terminal host may request the modem to turn OFF by de-asserting
the HOSTPWR _ON or by sending a specific NCL command across
the serial interface. For the modem to turn OFF after an NCL request
the HOSTPWR_ON signal must be de-asserted.
ESD protection is provided on all power supply lines and on each I/O
line.
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
terminal host 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 terminal host 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 NCL DTE interface
and the RF network. After successfully initialising the NCL DTE
interface, the modem asserts CTS. After the network ACK of the
registration sequence, DCD is asserted.