Navman 20 GPS Receiver User Manual


 
LA000577C © 2006 Navman New Zealand. All rights reserved. Proprietary information and specications subject to change without notice.
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2.7 Jupiter adapter printed circuit board
The module supplied in the Development kit is mounted on a carrier PCB in a method typical
of a customer application. This carrier PCB illustrates and implements many of the design
considerations discussed in this document.
The module is interfaced through two separate 20-pin data connectors with different header
pitches. This is for development purposes and provides a simple way to evaluate the surface
mount module.
The RTC (Real-Time Clock) backup supply voltage can be provided by an onboard lithium cell,
or from the development unit backup supply. The adapter board carries the antenna DC supply
over-current protection circuits (as shown in Figure 2-11), and a switch de-bounce IC to provide
reliable reset action from the development unit.
Figure 2-12 shows the adapter board with the positions of the connectors and indicators.
Jupiter module
antenna
power LED
GPS x LED
J1
J2 (not normally tted)
RTC backup battery
(not normally tted)
Figure 2-12: Adapter printed circuit board