20-101-0383 Rabbit Semiconductor, 20-101-0383 Datasheet - Page 67

• Manufacturer Part Number: 20-101-0383
• Description: MODULE RABBITCORE RCM2020
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0383

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Core Processor: Rabbit 2000
• Clock Speed: 18.432 MHz
• Interface Type: Ethernet, Serial
• Flash: 256 KB
• Timers: 5 x 8 bit, 2 x 10 bit
• Operating Supply Voltage: 4.75 V to 5.25 V
• Board Size: 48.3 mm x 58.4 mm x 14 mm
• Core: RCM2020
• Processor Series: RCM2000
• For Use With/related Products: RCM2020
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1082

A
C. P
M
PPENDIX
OWER
ANAGEMENT
Appendix C describes the RCM2000 power circuitry.
C.1 Power Supplies
The RCM2000 requires a regulated 5 V ± 0.25 V DC power source.
An RCM2000 with no loading at the outputs operating at 18.432 MHz typically draws 88 mA,
and an RCM2000 operating at 25.8048 MHz typically draws 120 mA. The RCM2000 will
consume 13 mA to 15 mA of additional current when the programming cable is used to
connect J3 to a PC.
C.1.1 Batteries and External Battery Connections
The RCM2000 does not have a battery, but there is provision for a customer-supplied bat-
tery to back up SRAM and keep the internal Rabbit 2000 real-time clock running.
Header J2, shown in Figure C-1, allows access to the external battery. This header makes
it possible to connect an external 3 V power supply. This allows the SRAM and the inter-
nal Rabbit 2000 real-time clock to retain data with the RCM2000 powered down.
Figure C-1. External Battery Connections at Header J2
A lithium battery with a nominal voltage of 3 V and a minimum capacity of 165 mA·h is
recommended. A lithium battery is strongly recommended because of its nearly constant
nominal voltage over most of its life.
User’s Manual
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