20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 129
20-101-0525
Manufacturer Part Number
20-101-0525
Description
COMPUTER SINGLE-BOARD LP3500 FOX
Manufacturer
Rabbit Semiconductor
Specifications of 20-101-0525
Module/board Type
Single Board Computer Module
Product
Modules
Processor Type
Rabbit 3000
Sram
512 KB
Flash
512 KB
Timers
8 bit, 10 bit
Number Of I/os
26
Backup Battery
3 V Lithium Coin Type
Operating Voltage
3 V to 30 V
Board Size
93 mm x 66 mm x 11 mm
Description/function
Computer Module
For Use With/related Products
LP3500
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1115
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E.1 External Power Supply
Power is normally supplied to the LP3500 via pins 16 and 17 of header J2 on the LP3500.
The Prototyping Board provides a convenient header plug for use with the AC adapter
included with the LP3500 Tool Kit. The Prototyping Board includes a Shottky diode for
protection against reverse polarity.
The raw DC power, VIN, goes through a linear regulator as shown in Figure E-1. The lin-
ear regulator outputs a Vcc of 2.8 V DC.
The power necessarily dissipated by the regulator can be calculated if both the external
input voltage and the current drawn by the LP3500 are known. The current provided by
the high-power output drivers does not have to be included if a separate power supply is
connected to K so that power does not come from Vcc.
User’s Manual
Appendix E describes the power circuitry provided on the
LP3500. The LP3500 can operate from an unregulated external
power source, or from an external battery. There is onboard bat-
tery backup for the SRAM and the real-time clock.
A
PPENDIX
Figure E-1. LP3500 Linear Regulator Circuit
E. P
W
W
OWER
M
ANAGEMENT
W
W
W
123
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