AMB8425-M-EV manual V1.1
Page 5 of 12
Last update: 14/08/2009
3.1.2 Connections
3.2 Power Supply
3.2.1 Power Adapter/Power Jack
The development board can be operated by connecting the supplied 5 V adapter or another
5 V
power source (pay attention to the polarity) to the power jack.
If the power supply is connected and the bridge on JP6 is set correctly (as in the factory state),
the
power LED
will be active.
3.2.2 JP11 / External Power Supply
The AMB8425-M and the RS232 converter can be powered via pin3 of JP1 (see following
figures). For this, earth can be connected to pin2 of JP1, pin24 of JP4, or one of the pins of
JP7. Voltage range: 3 V (RS232 converter) to 3.6 V.
In this case, JP11 must be opened (separation from the internal voltage control).
If the power supply is connected, the power LED will be active.
3.2.3 JP6 / Current Measurement Bridge
By default, JP6 is bridged for operation. If a current meter is connected instead of the bridge,
the power consumption of the radio module can be measured here.
JP7
GND
Power jack
For power supply
Sub-D jack
For RS232 interface
JTAG
Interface for programming
the module
Aerial jack
JP1/JP2/JP3/JP4
Direct access to the signals of
the radio module
