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 RCM3360/RCM3370 is typically 6 μA when no other power
is supplied. If a 165 mA·h battery is used, the battery can last about 3 years:
165 mA·h
------------------------ = 3.1 years.
6 μA
Note that the shelf life of a lithium ion battery is ultimately 10 years. The
RCM3360/RCM3370 does not drain the battery while it is powered up normally.
D.1.2 Reset Generator
The RCM3360/RCM3370 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 2.85 V and 3.00 V, typically 2.93 V.
The RCM3360/RCM3370 has a reset pin, pin 28 on header J4. This pin provides access to
the reset input of the reset generator, whose output drives the reset input of the Rabbit
3000 and peripheral circuits. The /RESET output from the reset generator is available on
pin 1 of header J4 on the RCM3360/RCM3370, and can be used to reset user-defined cir-
cuits on the motherboard on which the RCM3360/RCM3370 module is mounted.
132
RabbitCore RCM3360/RCM3370
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