User Manual

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USERS MANUAL
14(42)
Document number Revision
4/198 17-LXE 108 566 Uen PA7
Pin Signal Description
4
VRTC
3
1.8 V to 3.9V ( 3.4V to 3.9V if GPS mounted)
29
VCC_AUX
13.8 volt
±
20%
31
VCC_AUX
13.8 volt
±
20%
32
VCC_AUX
13.8 volt
±
20%
33
VCC_MAIN
5 volt
±
10% regulated
34
VCC_MAIN
5 volt
±
10% regulated
Table 5: CM52 Power Supply Signals
2.4.1.2 Ground Signal Pins
3
The ground signal in the CM52 is Digital Ground, GND, connected to the system
connector interface through pin numbers 5, 6, 8, 21 and 22.
Following is a list of the ground pins:
Pin Signal Description
5
GND Digital Ground
6
GND Digital Ground
8
GND Digital Ground
21
GND Digital Ground
22
GND Digital Ground
Table 6: CM52 Ground Signals
Digital Ground (GND) is the logical reference of all digital signals in the System
Interface as well as the DC return of the power supply signal, VCC_MAIN and
VCC_AUX (used for AMPS Class I operation). All 5 ground pins in the module need to
be connected to the application ground. The PCB mounting holes will not substitute the
regular ground connections.
2.4.2 Power Consumption
The following tables show typical and maximum currents that can be expected from the
module for various conditions.
3
Only applicable to units with GPS or RTC functions