XIAMEN OCULAR OPTICS CO., LTD.
7
SOUTH2/F, GUANGXIA BUILDING, TORCH HIGH-TECH DEVELOPMENT ARER,
XIAMEN 361006.P.R.CHINA TEL: 86-592-5650516 FAX: 86-592-5650695
Ø
Write or read cycle
Characteristic
Symbol
Min.
Typ.
Max.
Unit
E cycle
Tc
1000
-
-
ns
E high level width
Twh
450
-
-
ns
E low level width
Twl
450
-
-
ns
E rise time
Tr
-
-
25
ns
E fall time
Tf
-
-
25
ns
Address set-up time
Tasu
140
-
-
ns
Address hold time
Tah
10
-
-
ns
Data set-up time
Tdsu
200
-
-
ns
Data delay time
Td
-
-
320
ns
Data hold time (write)
Tdhw
10
-
-
ns
Data hold time (read)
Tdhr
20
-
-
ns
²
Write timing
t
D S U
t
D H W
t
A S U
t
A S U
t
AH
t
AH
t
R
t
F
t
W L
t
W H
t
C
D B 0 ~ D B 7
C S 1 , C S 2
C S , R S
R/W
E
M P U W r i t e t i m i n g
