101-0678 Rabbit Semiconductor, 101-0678 Datasheet - Page 130

• Manufacturer Part Number: 101-0678
• Description: KIT DEV RABBITCORE/RCM3600
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 3000r
• Type: MPU Moduler

Specifications of 101-0678

• Rohs Status: RoHS non-compliant
• Contents: RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
• Processor To Be Evaluated: RCM3600
• For Use With/related Products: RCM3600
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 316-1037

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.
The drain on the battery by the RCM3600 is typically 6 µA when no other power is sup-
plied. If a 235 mA·h battery is used, the battery can last about 4.5 years:
The actual life in your application will depend on the current drawn by components not on
the RCM3600 and the storage capacity of the battery. The RCM3600 does not drain the
battery while it is powered up normally.
Cycle the main power off/on on the RCM3600 after you install a backup battery for the
first time, and whenever you replace the battery. This step will minimize the current drawn
by the real-time clock oscillator circuit from the backup battery should the RCM3600
experience a loss of main power.
D.1.2 Reset Generator
The RCM3600 uses a reset generator to reset the Rabbit 3000 microprocessor when the
voltage drops below the voltage necessary for reliable operation. The reset occurs between
2.55 V and 2.70 V, typically 2.63 V.
The RCM3600 has a reset pin, pin 36 on header J1. This pin provides access to the reset
output from the reset generator, and is also connected to the reset input of the Rabbit 3000
to allow you to reset the microprocessor externally. A resistor divider consisting of R21
and R22 attenuates the signal associated with an externally applied reset to prevent it from
affecting the reset generator.
124
NOTE: Remember to cycle the main power off/on any time the RCM3600 is removed
235 mA·h
----------------------- -
from the Protoyping Board or motherboard since that is where the backup battery
would be located.
6 µA
=
4.5 years.
RabbitCore RCM3700