User’s Manual 63
TableA-2 lists the configuration options. 0 surface mount resistors are used for all the
header positions.
NOTE: Header JP3 is available only on Jackrabbit boards labeled 175-0255. These
boards were introduced in 2003.
Table A-2. Jackrabbit Jumper Configurations
Header Description Pins Connected Factory
Default
JP1 SRAM Size
n.c. 32K
1–2 128K ×
2–3 512K
JP2 Flash Memory Size 1–2 128K/256K ×
2–3 512K
JP3 Flash Memory Bank Select 1–2 Normal Mode ×
2–3 Bank Mode
HV3 S inking/Sourcing
D21
R55 Sinking
R56 Sourcing ×
RS-485 Bias and Termination
Resistors (not installed on
BL1820)
R17 Termination resistor ×
R16
R18 Bias resistors ×