Delta Tau 4AX-603625-XUXX E18A, B, C, D: Ethernet Communication Control , E19: Watchdog Disable Jumper , E20 E22: Power-Up/Reset Load Source , E23: Firmware Reload Enable , E25A, B, C: Flash Memory Firmware Bank Select

UMAC-CPCI Turbo CPU Board Hardware Reference Manual
Jumper Descriptions 13
E18A, B, C, D: Ethernet Communication Control
E Point & Physical
Layout Location Description Default
Jump 1 to 2 to Ethernet Connection to J7 front connector
Jump 2-3 for Ethernet connection through back J2 connector
Pins 1-2
jumpered
E19: Watchdog Disable Jumper
E Point & Physical
Layout Location Description Default
Jump pin 1 to 2 to disable Watchdog timer (for test purposes
only.).
Remove jumper to enable Watchdog timer.
No jumper
installed
E20 – E22: Power-Up/Reset Load Source
E Point &
Physical Layout Location Description Default
E20:
To load active memory from flash IC on power-up/reset,
Remove jumper E20;
Jump E21 pin 1 to 2;
Jump E22 pin 1 to 2.
Other combinations are for factory use only; the board will not
operate in any other configuration.
No E20 jumper
installed
E21 and E22
jump pin 1 to 2
E23: Firmware Reload Enable
E Point &
Physical Layout Location Description Default
Jump pin 1 to 2 to reload firmware through serial or host bus port.
Remove jum per fo r no rmal operations.
No jumper
installed
E25A, B, C: Flash Memory Firmware Bank Select
E Point &
Physical Layout Location Description Default
Remove all jumpers to select standard factory-installed bank of
operational firmware.
Install one or more jumper(s) to select alternate bank of operation
firmware to install (E23 ON) or use (E23 OFF).
No jumpers
installed
E18D1
E18C1
E18B1