AM29F002BT-70JC Spansion Inc., AM29F002BT-70JC Datasheet - Page 18

• 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

Erase Suspen d/Erase Resume Comm ands
T h e Er as e S u s pe nd c o m m a nd all ow s the s y s te m to
in te rru pt a s ec tor era s e o pe ration a nd th en re ad da ta
fro m , or p rog ra m d ata to , an y s ec tor n ot s e lec te d for
e ras ur e. Th is c om m a nd is va lid onl y d ur ing th e s e ctor
e ras e o p era tio n, i nc l ud ing th e 50 µ s ti m e- ou t pe ri od
d u ri n g th e s e c to r e r as e c o m m a n d s eq u e nc e. T he
E ras e S us pe nd c o m m an d is ig no red i f w ritten d ur ing
the c hip era s e o per ation or Em b edd ed Pr ogra m a lgo-
r ith m . W r iti ng the Er as e Su sp en d c o m m an d dur ing the
S e c to r E ra s e tim e -o ut i m m ed i ate l y ter m in a te s t he
tim e- ou t pe ri o d an d s u s p en d s th e e ra s e o p er ati on .
A dd re s s es a re “d o n’t- c ar es ” w h en w riti ng th e Er as e
S us pe nd c om m a nd .
W h en the Era s e S us p end c om m and is w ritten du ring a
s ec tor era se op era ti on, the de vi ce re qui res a m ax im u m
o f 2 0 µ s to s us p e nd the e ra s e o p er ati on . H ow e ve r,
w h en the E ras e S us p en d c o m m a nd is w ritten d ur ing
the s ec tor era se tim e- out, the de vi ce im m e dia te ly ter-
m i nate s the tim e-o ut p er io d a nd s u s pe nd s the e ras e
o pera tion.
A fter th e er as e op er ati on h a s b ee n s u s pe n de d, the
s y s tem c an r ea d arr ay d ata fro m o r pro gr am da ta to
a ny s ec tor no t s ele c te d for era s ure . (T he d evi ce “ eras e
s u s pe n ds ” a ll s e c to rs s e le c ted for e ra s u re.) N o r m a l
re ad a nd w rite tim in gs and c o m m an d defin iti ons ap ply.
R e ad i n g at an y a d d r e s s w it hi n e ra s e -s u s p e n de d
s e c to rs p ro d u c e s s ta tu s d a ta o n D Q 7 – D Q 0 . T h e
1 6
A m 29 F 002 B /A m 29 F 00 2N B
s y s te m c an u s e D Q 7, or D Q 6 a nd D Q 2 tog e th er, to
d eter m ine if a s ec tor is ac tiv ely e ras ing o r is e ras e- s us -
p en ded . S ee Se e
for in for m atio n on the s e sta tu s b its .
A fte r a n era s e-s u sp en de d p ro gram op era tion is c o m -
p lete, the s y stem c an onc e ag ain rea d a rray d ata w ithi n
n o n- s us p en d ed s e c tor s . T h e s y s te m c a n d ete rm in e
th e s tatus of the pro gra m op era ti on us in g the D Q 7 o r
D Q 6 s tatus b its , jus t as in th e s ta nd ard pro gram o pe r-
a tio n . S e e
m ore in fo rm atio n.
T he s y s te m c a n al s o w r ite the a uto s el ec t c om m an d
s e q ue nc e w h e n the d ev ic e i s i n the E ra s e Su s p en d
m od e . T h e d ev i c e a ll ow s r ea di n g au to s el ec t c o d es
e v en a t a dd re s s e s w i thi n er as in g s e c tor s , s in c e th e
c o de s a re no t s tore d in the m e m or y a rray. W hen th e
d ev ic e ex its the autos e lec t m ode , the d ev ic e rev er ts to
th e E ra s e S us pe nd m od e , a nd i s re ad y fo r an o the r
v a li d o p e r a ti o n . S e e S e e
S eq uen c e”
T h e s y ste m m u s t w ri te the E ras e R e s um e c om m an d
( add res s b its a re “do n’t c are ”) to ex it th e er as e s u sp en d
m ode an d c ontinu e th e se c to r e ras e op era tio n. F u rthe r
w r ites o f th e R es um e c om m and a re ign ore d. An othe r
E r as e S u s pe n d c om m a nd c a n b e w ri tte n a fte r th e
d ev ic e ha s re s um e d era si ng.
“W ri te O pe ra tio n S tatu s ”
on p ag e 13 for m or e infor m ation .
“W ri te O pe ration S ta tus ”
“A u to s e l e c t C o m m a n d
o n p ag e 1 8 for
on pa ge 1 8