31
RX-V320
IC5 : M5M51288BKJ-20LTEL (1M SRAM)
131072-word x 8 bit High Speed Static RAM
NC
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
D1
D2
D3
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VCC
A2
CE2
/WE
A1
A0
A16
A15
/OE
A14
/CE1
D8
D7
D6
D5
D4
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
ROW INPUT
BUFFER
TOP VIEW
A1
28
A0
27
A2
31
A3
2
A4
3
A5
4
A6
5
A7
6
A8
7
A9
8
A10
9
A11
10
A12
11
A13
12
A14
23
A15
25
A16
26
32
16
13
14
15
17
18
19
20
VCC
GND
D1
D2
D3
D4
D5
D6
D7
D8
21
/CE1
22
CE2
30
/WE
29
/OE
24
ROW ADDRESS
DECODER
131072-word x 8-bit
MEMORY ARRAY
(512-row X 2048-column)
COLUMN I/O
256
16
2048
I/O DATA CONTROL
COLUMN ADDRESS
DECODER
COLUMN INPUT
BUFFER
CHIP SELECT
WRITE CONTROL
OUTPUT CONTROL
CE2
L
X
H
H
H
/WE
X
X
L
H
H
/OE
X
X
X
L
H
Mode
Data I/O
Power
NOTE) H: High Level L: Low level X: Don't care
NOTE)
A0-A16:
Address input
D1-D8:
Data input/output
/CE1,CE2: Chip enable input
/OE:
Output enable input
/WE:
Write enable input
Non-selectable
Non-selectable
Write mode
Read mode
High impedance
High impedance
Input
Output
High impedance
On
Standby
On
On
On
/CE1
X
H
L
L
L
18
512
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