AM29F002BT-70JC Spansion Inc., AM29F002BT-70JC Datasheet - Page 14

• 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

S ec tor p ro te c tion /un pr otec tio n m us t be im ple m e nted
u s i n g p r o g r a m m i n g e q u i p m e n t. T h e p r o c e d u r e
re qu ires a hi gh vo lta ge (V
c on tr ol pin s. D etail s on thi s m eth od ar e p rov id ed in the
s u p p l e m e n t s ,
(A m 29 F 002 B) a nd 211 83 (Am 2 9F 00 2N B ). C ontac t an
A M D re pre s entativ e to ob tain a co py o f th e app rop ria te
d oc um e nt.
T h e d ev i c e is s h ip pe d w i th al l s e c tor s u n pr ote c ted .
A M D offers the o ption of p rog ram m in g and p rotec ting
s e c to rs a t i ts fa c to r y p r io r to s h ip p i ng th e d ev i c e
th rou g h AM D ’s E x pre s s F la s h™ Se r v ic e. C on tac t an
A M D r epr es en ta ti ve for de ta ils .
It is po s si ble to de te rm in e w h ethe r a se c to r is p rotec ted
o r unp rote cted . S ee
d etails .
Tempo rary Secto r Unprotect
N o t e : T hi s fe atu re r eq u ire s the R ES E T # p in a nd i s
the refore n ot ava ilab le on the A m 29 F 002 N B.
T h is fe atu re a llo w s te m p or ar y u np ro tec ti on o f p rev i -
o us ly p rote cted se c to rs to c ha ng e data in -s y ste m . T he
S e c to r U n p ro te c t m o d e i s a c tiv a te d b y s e ttin g the
R E S ET # p in to V
te c te d s e c to r s c a n b e p ro g r am m e d o r e ra s ed b y
s el ec ting the s ec tor a ddr es s es . O nc e V
fr om the R E S ET # p in , al l th e p r ev i ou s l y pr o tec ted
s ec tor s are pr otec ted a gain .
r ithm , a nd th e Tem p or ar y S e c to r U n pr ote c t di ag ra m
s ho w s the tim in g w av efo rm s , for this fe ature .
1 2
F ig u r e 1.
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once
again.
Te m p o r ar y S ect o r U n p ro t ect O p er at io n
ID
p u b l i c a t i o n
. D ur in g thi s m o de , for m e rl y p ro -
“Autos e lec t M od e”
Program Operations
Com pleted (Note 2)
T emporary Sector
Perform Erase or
R ESET # = V
RESET# = V
ID
U nprotec t
(Note 1)
STAR T
) on ad dre ss pin A9 an d the
F igu re 1
n u m b e r s
ID
IH
s how s the a lgo-
on pa ge 11 for
I D
A m 29 F 002 B /A m 29 F 00 2N B
is re m ov ed
2 0 8 1 9
Hardware Data Protection
T h e c om m a nd s e que nc e re qui rem e nt of u nlo ck c y c les
for p ro gra m m i ng o r e ra s ing p ro v ide s d a ta p ro tec tio n
a ga ins t in ad ve rten t w ri te s (re fe r to the C o m m an d D efi-
n ition s ta ble ). In a ddi tio n, the fo llow in g har dw are d ata
p rote ctio n m e as ur es pr eve nt ac c id enta l era s ure or pro -
g r a m m i n g , w h ic h m i g h t o t he r w i s e b e c a u s ed b y
s p uri ous s y s tem lev el s ig na ls dur ing V
p ow er -dow n tra ns ition s, or fro m s y s tem noi se .
L o w V CC W r it e In h ib it
W h en V
a c c ept any w ri te c y c les . T his pro te c ts da ta dur ing V
p ow er -up an d p ow er- dow n . T he co m m an d r egis ter an d
a ll i ntern al pro gram /e ras e ci rc uits ar e d is able d, a nd th e
d ev ic e res ets . Su bs eq ue nt w ri te s ar e i gno red u ntil V
i s gr ea ter th a n V
p ro pe r s i gna ls to the c o ntro l p in s to pre ve nt uni nten -
tio nal w r ites w h en V
W rite P u ls e “ Glitch ” Pr o tec tio n
N o is e puls e s of le s s than 5 ns ( ty p ic al) on OE #, C E # o r
W E# d o not initia te a w rite c y cl e.
L o g ica l In h ib it
W rite c y cl es a re in hib ite d by hol ding any one of O E# =
V
C E # an d W E# m u s t be a log ic al z er o w h ile O E# is a
l ogi ca l one .
P ow er -U p W r it e In h ib it
If W E # = C E# = V
d ev ic e d oes not a cc e pt c om m a nds o n the ri si ng e dg e
o f W E# . T h e in te r na l s ta te m ac h in e is au tom a tic a lly
r es et to r ead ing a rray da ta o n po we r-u p.
IL
, C E # = V
C C
i s le s s th a n V
I H
o r W E # = V
IL
LKO
an d O E# = V
CC
. T h e s y s te m m us t p ro v id e th e
is g rea te r th an V
L KO
IH
. To in iti ate a w rite c y c le,
, th e d ev i c e do e s n ot
IH
du ring po w er u p, th e
C C
LKO
p ow er -up an d
.
CC
CC