Wavenet Technology Pty Ltd. BM3900M 用户手册
Installation________________________________________________ Boomer-III User Manual & Integrator’s Guide
Copyright Wavenet Technology © October 2003
28
BM310012WT05
Modem On/Off Control
The modem on/off input line (HOSTPWR_ON) is an active high input
signal and is fitted with a 33Ω series resistor for input protection.
Internally it is passively pulled low (after the series resistor) to ground
and is asserted with a high input signal.
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. This facility may be utilised to further reduce
current consumption in battery powered applications, but note that the
modem may need to re-register on the network after wake-up
The electrical interface specification and equivalent circuit is as
follows:
The modem on/off input line (HOSTPWR_ON) is an active high input
signal and is fitted with a 33Ω series resistor for input protection.
Internally it is passively pulled low (after the series resistor) to ground
and is asserted with a high input signal.
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. This facility may be utilised to further reduce
current consumption in battery powered applications, but note that the
modem may need to re-register on the network after wake-up
The electrical interface specification and equivalent circuit is as
follows:
Modem On/Off Control Equivalent Circuit
Modem On/Off Control Electrical Characteristics
Parameter Range Low High
Input Voltage
0-3V
OR
0-5V
1.0 V (max)
2.5 V (min)
Input Current
20 µA (max)
100 µA (max)