101-0402 Rabbit Semiconductor, 101-0402 Datasheet - Page 66
101-0402
Manufacturer Part Number
101-0402
Description
KIT DEV TCP/IP 2000 INTL
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 2000r
Type
MPU Moduler
Datasheet
1.101-0402.pdf
(82 pages)
Specifications of 101-0402
Contents
RabbitCore Module, Dev. Board, Cable and Dynamic C® CD-Rom
For Use With/related Products
RCM2000, RCM2010, RCM2020
Lead Free Status / RoHS Status
Vendor undefined / Vendor undefined
- Current page: 66 of 82
- Download datasheet (2Mb)
B.2 Batteries and External Battery Connections
A battery board with a 1000 mA·h lithium coin cell is available to provide power to the
real-time clock and SRAM when external power is removed from the circuit. This allows
the TCP/IP Development Board to continue to keep track of time and preserves the SRAM
memory contents.
Figure B-2 shows the battery-board circuit.
Alternatively, starting with the 175-0206 version of the TCP/IP Development Board, there
is provision to add a soldered-in battery directly on the TCP/IP Development Board.
The drain on the battery is typically less than 20 µA when there is no external power
applied. The battery can last more than 5 years:
The drain on the battery is typically less than 4 µA when external power is applied. The
battery can last for its full shelf life:
Since the shelf life of the battery is 10 years, the battery can last for its full shelf life when
external power is applied to the TCP/IP Development Board.
62
1000 mA·h
-------------------------- -
4 µA
Figure B-2. Battery-Board Circuit
1000 mA·h
-------------------------- -
=
20 µA
28.5 years (shelf life = 10 years).
=
5.7 years.
TCP/IP Development Kit
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