20-101-1306 Rabbit Semiconductor, 20-101-1306 Datasheet - Page 63

• Manufacturer Part Number: 20-101-1306
• Description: CORE MODULE RCM5750
• Manufacturer: Rabbit Semiconductor
• Type: Serial to Ethernetr

Specifications of 20-101-1306

• Module/board Type: MPU Core Module
• Number Of I/os: 32
• Ethernet Connection Type: 10/100 Base-T
• Memory Type: Flash
• Operating Voltage: 3.3 V
• Operating Current: 70 mA
• Operating Temperature Range: - 40 C to + 85 C
• Board Size: 30 mm x 51 mm x 3 mm
• Product: Modules
• For Use With/related Products: RCM5750
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1183

B.4 Power Supply
The MiniCore requires a regulated 3.15 V – 3.45 V DC power source to operate. Depending on
the amount of current required by the application, different regulators can be used to supply this
voltage.
The Interface Board has an onboard +3.3 V linear regulator. The Interface Board is protected
against reverse polarity by a Shottky diode at D3 as shown in Figure B-4.
Figure B-4. Interface Board Power Supply
Power may be supplied to the Interface Board either via the mini USB connector at J5 or through
the power supply jack J6. When a separate power supply is used, the chip at U4 disables power
from the mini USB connector, which continues to supply power only to the USB interface chip.
Diodes at D1 and D2 prevent power from going back to the other power supply that is not supply-
ing power. A separate power supply is required whenever the Interface Board is not connected to
the PC.
A jumper on header JP2 controls the current limiting applied to the power drawn via the mini
USB connector — the current is nominally limited to 500 mA when no jumper is installed
(default), and is nominally limited to 700 mA when a jumper is installed.
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MiniCore RCM5700/RCM6700 User’s Manual
63