Rabbit RCM3200 Manuel d'utilisateur Page 82

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76 RabbitCore RCM3200
Table B-1 lists the electrical, mechanical, and environmental specifications for the Proto-
typing Board.
B.3 Power Supply
The RCM3200 requires a regulated 3.3 V ± 0.15 V DC power source to operate. Depend-
ing on the amount of current required by the application, different regulators can be used
to supply this voltage.
The Prototyping Board has an onboard +5 V switching power regulator from which a
+3.3 V linear regulator draws its supply. Thus both +5 V and +3.3 V are available on the
Prototyping Board.
The Prototyping Board itself is protected against reverse polarity by a Shottky diode at D2
as shown in Figure B-3.
Figure B-3. Prototyping Board Power Supply
Table B-1. Prototyping Board Specifications
Parameter Specification
Board Size 5.30" × 6.775" × 1.00" (135 mm × 172 mm × 25 mm)
Operating Temperature –20°C to +60°C
Humidity 5% to 95%, noncondensing
Input Voltage 8 V to 24 V DC
Maximum Current Draw
(including user-added circuits)
800 mA max. for +3.3 V supply,
1 A total +3.3 V and +5 V combined
Prototyping Area
2.0" × 3.5" (50 mm × 90 mm) throughhole, 0.1" spacing,
additional space for SMT components
Standoffs/Spacers 5, accept 4-40 × 3/8 screws
LINEAR POWER
REGULATOR
POWER
IN
J9/J11
10 µF
LM1117
U1
+RAW
+3.3 V
3
1
2
1
2
3
DL4003
D2
47 µF
340 µF
+5 V
L1
C17
330 µH
D1
1N5819
SWITCHING POWER REGULATOR
DCIN
U5
LM2575
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