AM29F002BT-70JC Spansion Inc., AM29F002BT-70JC Datasheet - Page 11

• Manufacturer Part Number: AM29F002BT-70JC
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of AM29F002BT-70JC

• Memory Size: 2Mbit
• Memory Configuration: 256K X 8
• Ic Interface Type: Parallel
• Access Time: 70ns
• Memory Case Style: PLCC
• No. Of Pins: 32
• Operating Temperature Range: 0°C To +70°C
• Termination Type: SMD

DEVICE BUS OPERATIONS
T hi s s ec tion de sc r ibe s th e req uire m en ts a nd us e of the
d evi ce bu s op era tio ns , w hic h ar e in itiated thro ug h the
i nte r n al c om m a n d r eg is ter. T h e c om m a n d r eg i s ter
its elf d oe s no t oc c upy a ny a ddr es s able m e m or y loc a-
tion . T he r egi ster is c om p os ed o f latc he s tha t s tore the
c om m and s, a lon g w i th the ad dre ss and da ta in fo rm a-
tion nee de d to exe c ute the c o m m an d. Th e c on te nts of
Leg end:
L = Logic Low = VIL, H = Logic High = VIH, VID = 12.0 ± 0.5 V, X = Don’t Care, DIN = Data In, DOUT = Data Out, A
No te:
the RESET# pin and is therefore not available on the Am29F002NB device.
Requirem ents for Reading Array Data
To rea d a rray d ata fr om the o utputs , the s ys tem m us t
d riv e the C E # a nd OE # pin s to V
c o n tr o l a nd s e l ec ts th e d e v ic e. O E # is th e o utp u t
c on trol an d ga te s a rray da ta to the ou tp ut pin s. W E#
s ho uld r em ai n at V
T he in tern al s ta te m a c hin e i s s et for rea din g arra y da ta
u pon dev ic e pow er -up, o r after a ha rdw ar e re s et. T h is
e ns ur e s th a t n o s pu r io us a lte ra ti on of th e m e m o r y
c o n te n t o c c u r s d u r i n g th e p o w e r tr a n s i ti o n . N o
c o m m a nd i s n e c es s a ry in th is m o de to o bta in a rr ay
d ata. S tand ard m i cr opr oc es s or r ead c y c le s tha t as s er t
v alid ad dre ss e s o n the dev ic e a dd res s inp uts pro duc e
v a li d d a ta o n the d ev i c e da ta ou tp u ts . T h e d ev ic e
re m a ins en ab le d fo r r ea d ac c e s s u ntil the c o m m a nd
re gis ter c on te nts a re a lte red .
S ee
th e ta ble ,
s p ec ifi ca tio ns an d
T im in gs d iagr am for th e tim in g w av eform s. I
D C C h ara cte ris tic s ta ble rep res e nts th e a c tiv e cu rre nt
s pe c ifi ca tion for re adin g ar ray d ata.
Writing Comm ands/Co mmand Sequ ences
To w r ite a c om m an d o r c om m a nd s e q ue nc e (w h ic h
in c lud es p rogr am m in g data to the d ev ic e a nd era s ing
Read
Write
CM OS Standby
TT L Standby
Output Disable
Res et (n/a on Am29F002N B)
Temporary Sec tor U nprotec t
(See Note)
“R ea din g Ar ray D
See the sections on Sector Group Protection and Temporary Sector Unprotect for more information. This function requires
“ R e ad O pe ra tio ns ”
Operatio n
IH
F ig ure 9
.
ata” for m or e infor m a ti on . S ee
T ab le 1.
fo r th e R ea d O pe rati on s
on pa ge 26 fo r tim in g
IL
. C E # i s th e pow er
A m 29 F 002 B /A m 2 9F 00 2N B D evice B us Op er a tio n s
V
C C
C E#
± 0.5 V
H
X
X
L
L
L
A m 29 F 002 B /A m 29 F 00 2N B
CC 1
i n the
OE#
H
X
X
H
X
X
L
W E#
t h e r e g i s te r s e r v e a s i n p ut s to th e i nt e r na l s ta t e
m ac hin e. T he s tate m ac hin e o utpu ts dic tate th e fu nc -
t i o n o f th e d ev i c e . T h e a p p r o p r i a t e d e v i c e b u s
o p e ra tio n s ta bl e li s ts th e i n pu ts a nd c o n tro l l ev e ls
r eq uire d, a nd the re s ultin g outp ut. T he fo llo w ing s ub -
s e c ti on s de s c rib e e ac h o f th es e o per ation s in fur the r
d etail .
s e c to rs o f m em or y) , the s y s te m m u s t dr ive W E # an d
C E # to V
A n era s e o pe ration c a n e ras e on e s ec tor, m ultip le s ec -
to rs , or the en tire dev i ce . T he S ec tor Ad dre s s Tab les
i ndi ca te the a ddr es s s pac e th at ea ch s ec tor o cc u pie s.
A “s e ctor ad dre ss ” co ns is ts of the add res s b its r equ ire d
to un ique ly s ele c t a s ec tor. Se e
o n pa ge 1 3
c h ip, o r su s pen din g/res u m ing th e era se o pe ration .
A f te r th e s y s te m w r i te s th e au t os e le c t c o m m a n d
s e que nc e, th e dev ic e e nters the au to s ele ct m od e. T h e
s y s t em c a n th e n r e a d au to s el e c t c o de s f ro m th e
i nter na l reg is ter (w h ic h is s e pa rate fro m the m e m o ry
a rray ) o n D Q 7– D Q0. S ta nd ard rea d c y c le tim in gs ap ply
i n th is m o de. S ee
“ Autos e lec t C om m a nd Se qu enc e ”
i nfo rm a ti on.
I
a c tiv e c ur re nt s p ec i fic a tio n for th e w r ite m od e.
C h ara c te ris tic s ”
tio n ta ble s a nd tim ing diag ram s fo r w rite op era tio ns .
Pro gram and Erase Operation Status
D u rin g an e ras e o r p rog ram op era ti on, th e s y s te m c a n
c h ec k the s tatu s of the op era ti on by re adin g the s tatus
b its on D Q7 –D Q0 . Stan dar d re ad c yc le tim ing s an d I
r ea d s p ec i fic a ti on s ap pl y. R e fer to
H
X
X
H
X
X
L
C C 2
i n the D C C ha ra c te ri s tic s tab le r ep r es e nts th e
(n /a A m29F 002NB )
IL
, an d O E# to V
RESET#
for d etail s o n era si ng a s ec tor o r th e en tir e
V
H
H
H
H
H
L
ID
o n p age 2 6 co ntain s tim ing s pe c ifi ca -
“A utos el ec t M od e”
IH
.
A0–A17
“ C om m a nd D efinitio ns ”
A
A
X
X
X
X
X
IN
IN
o n p age 13 for m or e
“ W ri te O pe ra tion
on p age 11 an d
IN
DQ0–DQ7
= Address In
High-Z
High-Z
High-Z
High-Z
D
D
OU T
X
IN
“A C
CC
9