Bottom Side - Rabbit Core RCM3700 User Manual

The RCM3720 Prototyping Board comes with the basic components necessary to demon-
strate the operation of the RCM3720. Two LEDs (DS1 and DS2) are connected to PF6 and
PF7, and two switches (S1 and S2) are connected to PF4 and PB7 to demonstrate the inter-
face to the Rabbit 3000 microprocessor. Reset switch S3 is the hardware reset for the
RCM3720.
The RCM3720 Prototyping Board provides the user with RCM3720 connection points
brought out conveniently to labeled points at header J2 on the RCM3720 Prototyping
Board. Although header J2 is unstuffed, a 2 × 20 header strip with a 0.1" pitch can be
installed. The 2 × 20 header (part number 405-0016) can be purchased through Rabbit's
online store.
To maximize the availability of resources, the demonstration hardware (LEDs and
switches) on the Prototyping Board may be disconnected. This is done by cutting the
traces seen within the silkscreen outline for header J4 on the bottom side of the RCM3720
Prototyping Board. Figure B-15 shows the four traces where cuts should be made. An
exacto knife or high-speed precision grinder tool like a Dremel
to cut the traces. Alternatively, if safety is a major concern, a small standard screwdriver
may be carefully and forcefully used to wipe through the PCB traces.
Figure B-15. Where to Cut Traces to Permanently Disable
Demonstration Hardware on RCM3720 Prototyping Board
RabbitCore RCM3700 User's Manual
Cut
RCM3720
Prototyping
Board

Bottom Side

Cut
SW1 PF4
SW2 PB7
DS1 PF6
DS2 PF7
CUT HERE
+5V
GND
®
tool would work nicely
117