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Using the STK525
2.2
Power Supply
The on-board power supply circuitry allows various power supply configurations.
2.2.1
Power Supply Sources
The power supply source can come from three different (3) and exclusive sources:
USB connector,
JACK PWR connector (J6, See Figure 2-2),
STK500
USB powered: When used as a USB device bus powered application, the STK525 can be powered via
the USB VBUS power supply line.
JACK PWR connector:
– Need of a male JACK outlet,
– Input supply from 9 up to 15V (1) DC,
– No specific polarization (2) is required.
Figure 2-2 . JACK PWR Connector (J6)
Figure 2-3 . Male JACK Outlet and Wires
+
-
STK500 Powered: (c.f. “STK500 Resources” on page 19 ).
STK525 Hardware User Guide
Notes:
1. 15V is the maximum level limitation of an unidirectional transit diode.
2. There is a diode (bridge) voltage level between the negative output of the power
supply and the STK525 “GND”. This could introduce some gap of voltage during
measurement and instrumentation.
3. Caution : Do not mount more than one power supply source on STK525.
2-7
7608A–AVR–04/06
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