AM29F002BT-70JC Spansion Inc., AM29F002BT-70JC Datasheet - Page 17

• 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

in te rru pts c an be re -en able d a fte r the las t S ec tor E ras e
c o m m an d i s w ri tten . If th e tim e be tw e e n a dd iti on a l
s e c to r er as e c o m m an d s c an b e a ss u m e d to be le s s
th an 5 0 µs , th e s y s te m n ee d n ot m on ito r D Q3 . A n y
c o m m a n d o t h e r t h a n S e c t o r E r a s e o r E r a s e
S u s p e n d d u r in g t h e tim e - o u t p e r io d r e s et s t h e
d ev ic e to r e a d in g a r r a y d a ta . T he s y s te m m u s t
r ew r ite the c om m a nd s eq u en c e a n d a ny ad d iti on a l
s ec tor a ddr es s es and co m m an ds .
T he s y s te m c an m o nitor D Q3 to deter m in e if th e s e ctor
e ras e tim e r ha s tim e d ou t. (S ee
T im e
fina l W E# p uls e in the co m m an d s equ en ce .
O nc e the s ec tor era s e o pe ratio n h as beg un , on ly the
E ras e Su sp en d c o m m an d i s va lid . All othe r c o m m and s
a re ig no red . O n th e A m 29F 0 02 B o nly, no te that a h ar d-
w a r e r e s e t d u r i n g th e s e c t o r e r a s e o p e r a ti o n
i m m ed i ate l y ter m in a te s the o pe r ati o n. T he S ec tor
E ras e c om m a nd s equ en ce s ho uld be re ini tia ted onc e
th e d ev i c e h as re tu r n ed to r ea d i ng a rr a y da ta , to
e ns ure d ata in te grity.
W h en the E m be dd ed E ras e al gor ithm is co m ple te, the
d evi ce re tu rn s to r ead ing ar ray da ta a nd add res s e s are
n o l o ng e r l a tc h e d. T h e s y s te m c an d et er m in e t he
s tatus of th e era s e o pe ra tio n by u s ing D Q 7, D Q6 , or
D Q 2. R efe r to
o n th es e s tatus bits .
F ig ure 3
tion . R efer to the Er as e/Pr ogra m O pe ration s tabl es in
the
a nd to the S ec tor Era se O pe ration s T im in g d iag ram for
tim in g w ave fo rm s .
“AC C ha ra c ter is tic s ”
r.”) T h e tim e -ou t b eg ins fro m the ris in g e dge of the
i llus tra te s the a lgo rith m for th e era s e o pe ra-
““W rite O per ation S tatus
on p ag e 2 6 fo r pa ram ete rs ,
“D Q3 : Se c tor E ras e
fo r infor m ation
A m 29 F 002 B /A m 29 F 00 2N B
N otes:
1. See the appropriate Command Definitions table for erase
2.
command sequence.
See
information.
“ DQ3: Secto r Er ase Tim er” o n p ag e 20
No
F ig u re 3.
Command Sequence
Erasure Completed
Write Erase
from System
Data = FFh?
Data Poll
START
Yes
E r ase O p er at io n
Embedded
Erase
algorithm
in progress
for more
15