101-0517 Rabbit Semiconductor, 101-0517 Datasheet - Page 93
![no-image](/images/no-image-200.jpg)
101-0517
Manufacturer Part Number
101-0517
Description
MODULE RABBITCORE RCM3100
Manufacturer
Rabbit Semiconductor
Datasheet
1.101-0517.pdf
(110 pages)
Specifications of 101-0517
Rohs Status
RoHS non-compliant
Module/board Type
MPU Core Module
For Use With/related Products
RCM3100
Other names
316-1021
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D.1 Power Supplies
The RCM3100 requires a regulated 3.3 V ± 0.15 V DC power source. The RabbitCore
design presumes that the voltage regulator is on the user board, and that the power is made
available to the RCM3100 board through header J2.
An RCM3100 with no loading at the outputs operating at 29.4 MHz typically draws 75 mA.
The RCM3100 will consume an additional 10 mA when the programming cable is used to
connect the programming header, J3, to a PC.
D.1.1 Battery-Backup Circuits
The RCM3100 does not have a battery, but there is provision for a customer-supplied bat-
tery to back up SRAM and keep the internal Rabbit 3000 real-time clock running.
Header J2, shown in Figure D-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 3000 real-time clock to retain data with the RCM3100 powered down.
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
Appendix D provides information on the current requirements
of the RCM3100, and includes some background on the chip
select circuit used in power management.
Figure D-1. External Battery Connections
A
PPENDIX
at Header J5
D. P
OWER
S
UPPLY
87
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