d15 Modem Integration and Application Developers Guide version draft 0.53 Page 27 of 181
3.1.2 Current consumption in D15
In order to design the power supply correctly you need to take in account the current consumption
of the D15 in the different modes.
Table 3 – d15 Current consumption
Mode
Current consumption
D15 with no accessory when no call is in
process (Sleep Mode)
<11mA Typical 10mA.
D15 with no accessory but TS is ON
< 50mA.
D15 during searching time
<180mA typical average 80mA.
D15 with DSC bus accessory(like Handset)
when no call is in process
Typical 45 mA.
D15 during a call in maximum power level
<1.5A Peak, Average 300mA.
D15 during a call in GSM power level #10 (for
Example)
<0.7A Peak, Average 175mA
3.1.2.1 Turn On/Off the unit
The D15 is powered from a single power supply in the range of 3.0 to 6.0 Vdc.
The unit will not power up automatically by connecting the power and there are two
ways to turn the unit On.
3.1.2.2 Turn On/Off the unit using the ON/OFF pin.
The On/Off pin (pin # 14 at the ZIF connector & pin # 18 at the DIN connector) is
used as a toggle input to turn On and Off the unit. Any drop to ground in this pin will
change the status.
To verify that the unit is On or Off you have to check the DSC_EN line, If it is high
the unit is On If it is low the unit is Off.
The timing for this process is the follow:
