Figure 17.5-1 sho, Figure 17.5-1 i – FUJITSU F2MC-8L F202RA User Manual
Page 386
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370
CHAPTER 17 FLASH MEMORY
Figure 17.5-1 Example of the Flash Memory Write Procedure
D
a
t
a
D
a
t
a
D
a
t
a
0
1
D
a
t
a
S
t
a
rt writing*
M
a
ke
su
re +10V DC volt
a
ge
i
s
a
pplied
a
t the R
S
T pin
b
efore
s
t
a
rt writing
*
FMC
S
: WE (
b
it5)
En
ab
le fl
as
h memory write
Write comm
a
nd
s
e
qu
ence
(1) FAAA <-- AA
(2) F554 <-- 55
(
3
) FAAA <-- A0
(4) Write
a
ddre
ss
<-- Write d
a
t
a
Re
a
d intern
a
l
a
ddre
ss
Next
a
ddre
ss
D
a
t
a
polling (DQ7)
Timing limit (DQ5)
Re
a
d intern
a
l
a
ddre
ss
D
a
t
a
polling (DQ7)
Write error
Fin
a
l
a
ddre
ss
NO
YE
S
FMC
S
: WE (
b
it5)
Write-di
sab
le fl
as
h memory.
Complete writing
Confirm with the h
a
rdw
a
re
s
e
qu
ence fl
a
g
s
.
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