6.0 FACTORY SERVI
C
E MODE TESTING
SD
RA
M Read/W
rit
e Test
Verification
of SDRAM S
elf-Refresh F
unction
alit
y
Steps
•
To v
erify
the SDRAM self
-Ref
re
sh
functionality, we
write a strin
g
of cha
ra
cters to the SDRAM and p
ut the SDRAM i
n self
-ref
re
sh
mode fo
r 5
Seco
nd
s an
d
Che
ck the
da
ta integrity b
efore
enteri
ng
and afte
r lea
ving Self-refresh
mod
e wi
thout any wri
te action
on
SDRAM.
•
Scroll to “S
DRAM Re
ad/Write Test
” usi
ng UP / Down
Key
•
Press RIG
H
T
to enter the test.
•
The test statu
s and results
will be sho
w
n on LCD. If th
e test is
su
ccessful, “SDRAM R/
W
TEST OK”
is
displ
ayed on
the LCD and i
f
the test fails “SDRAM TES
T
FAIL” will be displ
ayed on the LCD.
<HDD084 S
DRAM
>
< S
el
f Refresh
Test
>
<
SD
RAM Un
der T
e
st
>
<
>
HD
D084
SDRA
M
>
<
Self
Refresh T
est
>
<
SD
RAM Self
re
fr
esh FAIL
>
<
>
•
This te
st can
be exited in b
etwee
n the testing process by pressing
LEFT key.
Verification
of SDRAM
Read Wri
te Fu
nctionality
To Verify SDRAM Re
ad Write Fun
ctiona
lity Write a pa
ttern 0x55aa
55aa to
a spe
cific lo
cation and rea
d back the da
ta to verify th
e data Integrit
y.
<
H
D
D
084 SD
RA
M R/
W
T
est
>
<
>
<
SDR
A
M
Under
T
e
st
>
<
>
<HDD084 SDRA
M
R/W Test >
<
>
<
SD
RAM
R/
W O
K
>
<
>
SDRAM Self-Refresh T
est
Steps
•
Sc
roll to “S
DRAM Self Ref
resh Tes
t” us
ing UP / Down Key
•
Press RIG
H
T
to enter the test.
•
The test statu
s and results
will be sho
w
n on LCD. If th
e test is
su
cc
es
sf
ul,
“
S
DRA
M
self
r
ef
res
h T
EST OK” is di
spla
yed on the L
CD
and if the test fails “SDRAM self
refresh
FAIL” will be
displ
ayed on
the
LCD.
•
This te
st can
be exited in b
etwee
n the testing process by pressing
LEFT key.
Summary of Contents for HDD082
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