20-101-0673 Rabbit Semiconductor, 20-101-0673 Datasheet - Page 129

• Manufacturer Part Number: 20-101-0673
• Description: MODULE RABBITCORE RCM3610
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0673

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Core Processor: Rabbit 3000
• Clock Speed: 22.1 MHz
• Interface Type: Serial
• Flash: 256 KB
• Timers: 10 x 8 bit, 1 x 10 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Board Size: 31 mm x 54 mm x 16 mm
• Core: RCM3610
• Processor Series: RCM3600
• For Use With/related Products: RCM3610
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1103

D.1 Power Supplies
Power is supplied from the motherboard to which the RCM3600 is connected via header
J1. The RCM3600 has an onboard +3.3 V linear power regulator that provides the +3.3 V
supply to operate the RCM3600. Figure D-1 shows the power-supply circuit.
The input voltage should be 5 V ± 0.25 V DC. An RCM3600 with no loading at the outputs
typically draws 60 mA when operating at 22.1 MHz. Take care that any DC loading (for
example, sourcing digital outputs) does not increase the overall current to more than 190
mA to keep the +3.3 V linear regulator from overheating.
D.1.1 Battery-Backup Circuits
The RCM3600 does not have a battery, but there is provision for a customer-supplied bat-
tery to back up the data SRAM and keep the internal Rabbit 3000 real-time clock running.
Header J1, shown in Figure D-1, allows access to the external battery. This header makes
it possible to connect an external 3 V battery. This allows the SRAM and the internal Rab-
bit 3000 real-time clock to retain data with the RCM3600 powered down.
User’s Manual
Appendix D provides information on the current requirements
of the RCM3600, and includes some background on the chip
select circuit used in power management.
A
Figure D-1. RCM3600 Power Supply
PPENDIX
D. P
OWER
S
UPPLY
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