98-08901C63-A
17
Hardware Description
3.2.1
Current Consumption
In order to correctly design the power supply or battery for the c18, integrators should take into account the current consumption
of the c18 in its various operating modes. The c18 is a CDMA phone that transmits in continuous mode. Table 6 lists the
maximum current for each mode supported by the c18 module.
* For SCI2, TBR = 30 minutes.
3.3
c18 OPERATING MODES
The
c18 has four input pins, OPT1, OPT2, AUDIO IN and USB_VBUS, which define the c18 mode of operation.
Table 7 summarizes the available operating modes on the c18.
Note:
1: The default state. The c18 contains internal pull-up resistors. Configuration pins can be left open.
0: Requires external 10k
Ω
pull-down resistor.
For more information about pin locations, see “Connector Pin Assignments” on page 39.
Table 6. Current Consumption
Mode
Current Consumption
IS95 A/B
1X
AMPS
Talk
740 mA
740 mA
940 mA
Receive
110 mA
110 mA
55 mA
Standby
5 mA*
<
3.7 mA*
55 mA
Off
< 5
µ
A
Table 7. c18 Modes of Operation
Mode
Pin Name
Notes
OPT1
OPT2
AUDIO IN
USB_VBUS
RS232 (8 W) +
analog audio
0
1
1
0*
* Pull-down resistor is
not required
USB + analog
audio
1
1
1
> 4.0 V
USB + RS232
1
1
0
> 4.0 V
Required for CDG2
certification
Flashing
Shorted
to OPT2
Shorted
to OPT1
1
Non-standard mode
used for special flashing
Note
Other combinations of pin states are not supported and should not be used.
OPT1 and OPT2 signals are not available on models using a 28-pin interface connector. In this case, the
communication mode depends on the model. Some models are supplied with a hardware RS232 preset mode,
models without such a preset may be used for USB communication only.
Содержание c18
Страница 1: ...Developer s Guide Motorola c18 Cellular Engine Module Description 98 08901C63 A ...
Страница 8: ...viii 98 08901C63 A ...
Страница 20: ...Introduction 12 98 08901C63 A ...
Страница 46: ...Hardware Description 38 98 08901C63 A ...
Страница 56: ...Mechanical Description 48 98 08901C63 A Figure 22 c18a1 Bottom View Figure 23 c18a1 Side View ...
Страница 57: ...98 08901C63 A 49 Mechanical Description Figure 24 c18c Top View Figure 25 c18c Bottom View ...
Страница 60: ...Service Support 52 98 08901C63 A ...
Страница 62: ...Suggested Connectors 54 98 08901C63 A ...
Страница 78: ...Hardware Requirements for CDG2 and Field Testing 70 98 08901C63 A ...
Страница 82: ...Index 74 98 08901C63 O ...