RabbitCore RCM2100, Руководство по началу работы

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Getting Started 9
2.2.1 Prototyping Board Features
Power Connection.
A 3-pin header is provided for connection of a power supply. Note that it is sym-
metrical, with both outer pins connected to ground and the center pin connected to the raw V+
input. The cable of the wall transformer provided with the North American version of the Develop-
ment Kit ends in a connector that is correctly connected in either orientation.
Users providing their own power supply should ensure that it delivers 9–24 V DC at not less than
500 mA. The voltage regulator will get warm in use, but lower supply voltages will reduce thermal
dissipation from the device.
Regulated Power Supply.
The raw DC voltage provided at the POWER IN jack is routed to a 5 V lin-
ear voltage regulator, which provides stable power to the RCM2100 module and the Prototyping
Board. A Shottky diode protects the power supply against damage from reversed raw power con-
nections.
Power LED.
The power LED lights whenever power is connected to the Prototyping Board.
Reset Switch.
A momentary-contact, normally open switch is connected directly to the RCM2100’s
/RES_IN pin. Pressing the switch forces a hardware reset of the system.
I/O Switches & LEDs.
Two momentary-contact, normally open switches are connected to the PB2 and
PB3 pins of the RCM2100 module, and may be read as inputs by sample applications.
Two LEDs are connected to the PA0 and PA1 pins of the module, and may be driven as output indi-
cators by sample applications. (Two more LEDs, driven by PA2 and PA3, may be added to the Pro-
totyping Board for additional outputs.)
All the LEDs are connected through JP1, which has traces shorting adjacent pads together. These
traces may be cut to disconnect the LEDs, and an 8-pin header soldered into JP1 to permit their
selective reconnection with jumpers. See Figure 3 for details.
Expansion Areas.
The Prototyping Board is provided with several unpopulated areas for expansion of
I/O and interfacing capabilities. See the next section for details.
Prototyping Area.
A generous prototyping area has been provided for the installation of through-hole
components. Vcc (5 V DC) and Ground buses run around the edge of this area. An area for surface-
mount devices is provided to the right of the through-hole area. (Note that there are SMT device
pads on both top and bottom of the Prototyping Board.)