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PROCESSOR TECHNOLOGY CORPORATION
8KRA STATIC READ/WRITE MEMORY MODULE
SECTION III
3.1
OPTION SELECTION
Jumper options that control three operating parameters are
provided on the 8KRA Memory Module.
They are:
phantom memory dis
able,
power-up initialization,
and waiting time.
The starting
address is switch selectable.
Use the following option selection
instructions in conjunction with the assembly drawing in Section V.
3.2
WAITING TIME OPTION (AREA A)
Since the 8KRA operates at maximum speed, you normally will
not enable the waiting time option.
To configure the 8KRA for no waiting time, install a jumper
(#24 bare wire is recommended) between the W and 0 pins in Area A .
For special applications, you may wish to enable the waiting
time option.
You have, in this case, a choice of enabling one or
two wait states.
Each state is 0.5 usee in duration.
NOTE
Wait states cannot be selected un
less IC73, the "wait state counter",
is installed.
To select one wait state , install a jumper (#24 bare wire
is recommended) between the W and 1 pins in Area A .
To select two wait states , install a jumper (#24 bare wire
is recommended) between the W and 2 pins in Area A .
3.3
POWER-UP INITIALIZATION OPTION (AREA B)
The jumper arrangement
will come up in the protected
initially applied or restored
tect mode , a random operation
data .
in Area B determines whether the 8KRA
or unprotected mode when power is
after a power failure.
In the pro-
cannot improperly rewrite retained
To select the power-up protect mode , install a jumper (#24
bare wire is recommended) between the CLR and P pins in Area B .
To
bare wire
select the power-up unprotect mode , install a jumper (#24
is recommended) between the CLR and U pins in Area B .
III-l
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