101-0680 Rabbit Semiconductor, 101-0680 Datasheet - Page 160

• Manufacturer Part Number: 101-0680
• Description: KIT DEV RABBITCORE/RCM3700
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 3000r
• Type: MPU Moduler

Specifications of 101-0680

• Rohs Status: RoHS non-compliant
• Contents: RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
• Processor To Be Evaluated: RCM3700
• Data Bus Width: 8 bit
• Interface Type: Ethernet
• For Use With/related Products: RCM3700
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 316-1038

D.1 Power Supplies
Power is supplied from the motherboard to which the RCM3700 is connected via header
J1. The RCM3700 has an onboard +3.3 V linear power regulator that provides the +3.3 V
supply to operate the microprocessor-related circuitry of the RCM3700, but not the Ether-
net circuit, which requires + 5 V. Figure D-1 shows the power-supply circuit.
The RCM3700 requires a regulated 4.75 V to 5.25 V DC power source. An RCM3700 with
no loading at the outputs operating at 22.1 MHz typically draws 100 mA.
RabbitCore RCM3700 User’s Manual
Appendix D provides information on the current requirements
of the RCM3700, and includes some background on the chip
select circuit used in power management.
CAUTION: Be sure that the input to pin 39 on header J1 is connected to a regulated 5 V
supply. The regulated 5 V supply is required for the Ethernet circuitry, which is not
protected against overvoltage conditions.
A
Figure D-1. RCM3700 Power Supply
PPENDIX
D. P
OWER
S
UPPLY
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