20-101-1067 Rabbit Semiconductor, 20-101-1067 Datasheet - Page 99

• Manufacturer Part Number: 20-101-1067
• Description: MODULE RABBITCORE RCM3305
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1067

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Flash: 512 KBytes
• Timers: 10 bit
• Operating Supply Voltage: 3.15 to 3.45 V
• Board Size: 47 mm x 69 mm x 22 mm
• For Use With/related Products: RCM3305
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1113

The Prototyping Board comes with a 220 Ω termination resistor and two 681 Ω bias resis-
tors installed and enabled with jumpers across pins 1–2 and 5–6 on header JP5, as shown
in Figure B-9.
For best performance, the termination resistors in a multidrop network should be enabled
only on the end nodes of the network, but not on the intervening nodes. Jumpers on boards
whose termination resistors are not enabled may be stored across pins 1–3 and 4–6 of
header JP5.
B.4.7 RabbitNet Ports
The RJ-45 jack labeled RabbitNet is a clocked SPI RS-422 serial I/O expansion port for
use with RabbitNet peripheral boards. The RabbitNet jack does not support Ethernet con-
nections. Header JP3 must have pins 2–3 jumpered when using the RabbitNet port.
The RabbitNet port is enabled in software by setting PD2 = 1. Note that the RabbitNet
port and the J11 interface cannot be used simultaneously.
User’s Manual
Figure B-9. RS-485 Termination and Bias Resistors
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