Digi RCM4000 - Manual (Page 100)

94 RabbitCore RCM4000
• Current Measurement Option —You may cut the trace below header JP1 on the
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 RCM4000 SRAM and real-time clock.