AS7C256
AS7C256L
写周期
11
-10
参数
写周期时间
芯片使能写到底
地址设置写到底
地址建立时间
把脉冲宽度
从写结束地址保持
有效的数据写入结束
数据保持时间
写使能到输出中高Z
从输出的写端活跃
-12
(V
CC
= 5V ±10 % , GND = 0V ,T
a
= 0 ° C至+ 70 ° C)
-15
-20
-25
-35
符号最小值最大值最小值最大值最小值最大值最小值最大值最小值最大值最小值最大值单位注
t
WC
t
CW
t
AW
t
AS
t
WP
t
AH
t
DW
t
DH
t
WZ
t
OW
10
9
9
0
7
0
6
0
–
3
–
–
–
–
–
–
–
–
5
–
12
10
10
0
8
0
6
0
–
3
–
–
–
–
–
–
–
–
5
–
15
12
12
0
9
0
8
0
–
3
–
–
–
–
–
–
–
–
5
–
20
12
12
0
12
0
10
0
–
3
–
–
–
–
–
–
–
–
5
–
20
15
15
0
15
0
10
0
–
3
–
–
–
–
–
–
–
–
5
–
30
20
20
0
17
0
15
0
–
3
–
–
–
–
–
–
–
–
5
–
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4, 5
4, 5
4, 5
写周期1的时序波形
10, 11
t
WC
t
AW
地址
WE
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAAAA
(我们控制)
t
AH
t
WP
t
DW
数据有效
t
WZ
t
OW
t
DH
t
AS
D
in
D
OUT
AS7C256-05
写周期2时序波形
10, 11
t
WC
t
AW
地址
t
AS
CE
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
WE
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
( CE控制)
t
AH
t
CW
t
WP
t
WZ
t
DW
数据有效
AAAAAAAAAAAAAAA
AAAAAAAAAAAAAAA
AAAAAAAAAAAAAAA
AAAAAAAAAAAAAAA
AAAAAAAAAAAAAAA
AS7C256-06
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
t
DH
D
in
D
OUT
5