D
Y
4 S
YSTEMS
I
NC
.
P
RE
-I
NSTALLATION
T
ASKS
812628 V
ERSION
1 O
CTOBER
2003
2-9
E
XECUTION
S
EQUENCE
C
ONTROL
J
UMPER
The SCP/DCP-122 has a software-readable jumper located at E11-E12. This jumper, referred
to as the User Link or Software Switch, is used to control the power-up sequence for the
Foundation Firmware and applications.
The on-board Foundation Firmware checks the state (connected or open) of the User Link on
power-up and uses this along with the serial channel 1 DSR input to select one of four
possible execution sequences. See “Initiating the Power-Up Sequence” on page 4-16 for
more information.
For information on the code executed, refer to the SCP/DCP-122 Programmer’s Reference
Manual.
Factory configurations are performed via the installation/removal of configuration resistors.
Please contact the factory if you require information about factory configured options. Under
normal circumstances, you should not need to alter any of the factory-configured options.
F
IGURE
2.7: Execution Sequence Control Jumper
T
ABLE
2.7: User Link Configuration
Option
Jumper Setting
Execution Sequencer Control:
(sets the PCI Control and Status Register bit SW0 = 0).
(sets the PCI Control and Status Register bit SW0 = 1).
Connect E11-E12
Open E11-E12
E1
E5
E7
E1
3
E2
E6
E8
E1
4
E3
E4
E9
E1
0
E1
2
E1
1
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