1689-9640
Digibridge IEEE-488.2 Board
Page 3
Jumpers
The Digibridge IEEE-488.2 interface board has three jumpers, JP1, JP2, and JP3. For normal
operation, all three jumpers should be open (no shorting blocks inserted).
JP1 enables the RS-232 interface driver auto power off.
JP2 forces firmware update mode via RS-232 serial interface. If JP2 is set, the board will be
forced to await firmware update and the Digibridge will be held in reset state.
JP3 enables flash write protect. If JP3 is set, certain onboard flash will be prevented from being
updated. Since multiple safeguards are in place to prevent unintentional flash overwriting, the
use of JP3 is not needed.
All other headers, populated and non-populated, are intended only for manufacturing test or
future use. Do insert connectors or shorting blocks into these headers as the board may
malfunction or permanent damage may result.
RS-232 Serial Interface
The RS-232 Serial Interface implements a standard 9 wire DTE serial interface requiring the use
of a standard 9-pin Female-to-Female Null Modem cable for connection to a PC. In normal use,
either the IEEE-488 interface or the RS-232 interface is used. Using both interfaces at the same
time is possible, but will degrade overall communication speed and can lead to communication
conflicts.
