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—Two 3-wire or one 5-wire RS-232 serial ports are available on the Prototyp-
RS-232
•
ing Board at header J4. A 10-pin 0.1" pitch header strip installed at J4 allows you to
connect a ribbon cable that leads to a standard DE-9 serial connector.
•
Current Measurement Option
bottom side of the Prototyping Board and install a 1 × 2 header strip from the Develop-
ment Kit to allow you to use an ammeter across the pins to measure the current drawn
from the +5 V supply. Similarly, you may cut the trace below header JP2 on the bottom
side of the Prototyping Board and install a 1 × 2 header strip from the Development Kit
to allow you to use an ammeter across the pins to measure the current drawn from the
+3.3 V supply.
Backup Battery
—A 2032 lithium-ion battery rated at 3.0 V, 220 mA·h, provides
•
battery backup for the RCM4200 SRAM and real-time clock.
104
—You may cut the trace below header JP1 on the
RabbitCore RCM4200
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