52
53
54
55
56
57
58
59
60
61
62
63
64
v dd(+5v)
v dd(+5v)
nc 32
31
30
29
28
27
26
25
24
23
22
21
20
gnd
v dd(+5v)
gnd
gnd 51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 nc
nc
nc
nc
nc
nc pin
no. i/o 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 i
i
i
i
i
i
i
i
i
i
i
i
? ? o
i/o a12l
oel
a0l
a1l
a2l
a3l
a4l
a5l
a6l
a7l
a8l
a9l
nc
nc
be
i/o1l signal pin
no. i/o 17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32 i/o
i/o
i/o
i/o
i/o
i/o
i/o
? ? ? ? i/o
i/o
i/o
i/o
i/o i/o2l
i/o3l
i/o4l
i/o5l
i/o6l
i/o7l
i/o8l
gnd
gnd
v dd
gnd
i/o1r
i/o2r
i/o3r
i/o4r
i/o5r signal pin
no. i/o 33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48 i/o
i/o
i/o
? ? ? i
i
i
i
i
i
i
i
i
i i/o6r
i/o7r
i/o8r
nc
nc
nc
a9r
a8r
a7r
a6r
a5r
a4r
a3r
a2r
a1r
a0r signal pin
no. i/o 49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64 i
i
i
i
o
i
i
i
? ? i
i
i
o
i
i oer
a12r
a11r
a10r
int r
busy r
we r
cs r
v dd
v dd
cs l
we l
busy l
int l
a10l
a11l signal ( v dd = +5v ) ?op view MB8441-45PFQ ( 1/3 )
il00 c-mos 64k-bit dual port static ram ********** www.datasheet www.datasheet www.datasheet www.datasheet 4u 4u4u 4u .com .com .com .com 4 .com u datasheet
a0l - a10l,
a0r - a10r
be
busy l, busy r
cs l, cs r
i/o0l - i/o10l,
i/o0r - i/o10r
int l, int r
oe l, oe r
we l, we r
; address inputs
; busy output enable
; busy inputs
; chip select inputs
; data inputs/outputs
; interrupt outputs
; output enable inputs
; write enable inputs MB8441-45PFQ ( 2/3 ) a0l
a1l
a2l
a3l
a4l
a5l
a6l
a7l
a8l
a9l
a10l
busyl
a0r
a1r
a2r
a3r
a4r
a5r
a6r
a7r
a8r
a9r
a10r
busyr 16
17
18
19
20
21
22
23
62
28
29
30
31
32
33
34
35
53 i/o1l
i/o2l
i/o3l
i/o4l
i/o5l
i/o6l
i/o7l
i/o8l
intl
i/o1r
i/o2r
i/o3r
i/o4r
i/o5r
i/o6r
i/o7r
i/o8r
intr 3
4
5
6
7
8
9
10
11
12
63
61
48
47
46
45
44
43
42
41
40
39
52
54 59 csl 60 wel 56 csr 2 oel 49 oer 55 wer www.datasheet www.datasheet www.datasheet www.datasheet 4u 4u4u 4u .com .com .com .com 4 .com u datasheet
28
29
30
31
32
33
34
35 i/o1l
i/o2l
i/o3l
i/o4l
i/o5l
i/o6l
i/o7l
i/o8l 59
2 csl
oel 10
9
8
7
6
5
4
3 a7l
a6l
a5l
a4l
a3l
a2l
a1l
a0l 61
62 busyl
intl 1
64
63
12
11 a12l
a11l
a10l
a9l
a8l i/o
buffer interrupt 8.192 8 bit
memory
cell array row
decoder 60 wel wel oel 28
29
30
31
32
33
34
35 i/o1r
i/o2r
i/o3r
i/o4r
i/o5r
i/o6r
i/o7r
i/o8r 56
49 csr
oer 41
42
43
44
45
46
47
48 a7r
a6r
a5r
a4r
a3r
a2r
a1r
a0r 50
51
52
39
40 a12r
a11r
a10r
a9r
a8r i/o
buffer column
decoder column
decoder row
decoder 55 wer wer oer 54
53
15 busyr
intlr
be 13 13 MB8441-45PFQ ( 3/3 ) www.datasheet www.datasheet www.datasheet www.datasheet 4u 4u4u 4u .com .com .com .com 4 .com u datasheet
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