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IC302: TA8227P
12
7
1
6
B.S. 1
12
Vcc1
1
Vcc2
IC302: KM44V1000DT-6
20
16
15
11
1
5
6
10
4
RAS
Control
17
CAS
Clocks
3
W
6
A0
Refresh Timer
7
A1
8
A2
Refresh Control
9
A3
11
A4
12
A5
Refresh Counter
13
A6
14
A7
Row Address Buffer
A8
15
A9
5
Col. Address Buffer
Out 1
3
2
30 kΩ
Ch 1
45Ω
5
6
In 1
NF 1
V
CC
10
VBB Generator
Row Decoder
Memory Array
1,048,576 x 4
Column Decoder
45
Power GND
4
Bias Circuit
Thermal
Shut Down
Protection
Circuit
9
Ripple
V
SS
20
Cells
OUt 2
B.S. 2
11
10
30 kΩ
Ch 2
45Ω
7
8
In 2
NF 2
Data in
Buffer
Data out
Buffer
Pre GND
(F In)
1 DQ0
2
DQ1
18
DQ2
19
DQ3
16 OE
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