Reference Design - Globalstar STINGR User Manual

Revision 0.2 STINGR Users Manual

4 Reference Design

The reference design presented below illustrates a basic implementation using the STINGR module in conjunction with a
primary battery, USB interface, and test mode switches.
Since the battery is located on the same board as the STINGR, no decoupling capacitor is required on the VBATT input,
however, if there are battery leads, lengthy power distribution, or noise sources present, a suitable decoupling capacitor
might be appropriate. A ceramic XR7 10uF capacitor is usually a good choice.
Switch S1 can be used to initate test modes of operation without using the USB serial interface using the settings shown
in Table 6.1. Select the desired test mode and depress S3 (reset) to execute the selected test mode.
When interfacing to a host processor, replace the USB serial interface with a 3.0 volt serial interface.
The USB interface is powered by the USB bus, however, due to the high peak current requirements of the STINGR during
transmissions, the STINGR is powered by the battery.
Revision 0.2 Subject To Change without Notice P a g e | 13
06/24/15