User`s guide

Appendix A. EEROM Parameter Settings
EK–KZPBA–UG. B01 A–3
Table
A
–1 Descriptions of Host Adapter Parameters (KZPBA-CA General
Operation) (
Continued
)
Parameter Default Description Option
REQ/ACK
Active Negation
1 Provides Active pull-up assist in
sin
g
le-ended mode. (The REQ and
ACK si
g
nals are pulled up.) B
y
enablin
g
active ne
g
ation, the
KZPBA-CA host adapter is less
sensitive to an imperfect SCSI bus.
Set to 0 to disable the
active negation.
Data Line Active
Negation
1 Provides active pull-up assist in
sin
g
le-ended mode. (The SD15-0
and SDP1-0 si
g
nals are pulled up.)
B
y
enablin
g
active ne
g
ation, the
KZPBA-CA host adapter is less
sensitive to an imperfect SCSI bus.
Set to 0 to disable the
active negation.
Data DMA Burst
Enable
1 When set to 1, performs burst
transfers on the data DMA channel.
When set to 0, data is
transferred in
nonburst mode with
each c
y
cle initiated b
y
a new address phase.
Command DMA
Burst Enable
1 When set to 1, performs burst
transfers on the data DMA channel.
When set to 0, data is
transferred in
nonburst mode with
each c
y
cle initiated b
y
a new address phase.
Tag Aging 8 Insures ta
gg
ed commands are not
lost in the tar
g
et device. Ta
g
a
g
in
g
is a backup to the time-out
mechanism.
0–255 c
y
cles, drive
dependent.
Low
Termination
Enable
1 Provides termination to the low-
order eight bits.
Set to 0 if termination
not required on the
board. See
termination section of
this
g
uide for
termination
requirements.