Digi BL1800 user manual Table A-2. Jackrabbit Jumper Configurations

Table A-2lists the configuration options. 0 Ω surface mount resistors are used for all the header positions.

Table A-2. Jackrabbit Jumper Configurations

Header	Description		Pins Connected	Factory
				Default
		n.c.	32K
JP1	SRAM Size	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
		D21	Sinking
—	HV3 Sinking/Sourcing	R55
		R56	Sourcing	×
	RS-485 Bias and Termination	R17	Termination resistor	×
—	Resistors (not installed on
		R16		×
	BL1820)		Bias resistors
		R18

NOTE: Header JP3 is available only on Jackrabbit boards labeled 175-0255. These boards were introduced in 2003.

User’s Manual 63