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RX-7000RBK
LC7522 (IC451) : SEA Control
1.Pin layout
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
3.Pin function
Pin No.
Symbol
1
V
Power Supply terminal for Audio signal +7V(typ)
DD
18
V
Power Supply terminal 0V
SS
14
V
Power Supply terminal for Audio signal. Single channel use, joint VSS.
EE
15
Power Supply terminal +5V(typ)
V
CC
2,27
Audio signal Input terminal
IN 1
3,26
IN 2
IN1 joint opposite input of Operation amp.
IN2 joint inapposite input of Operation amp.
It have Right and Left.
16
D1
Data input terminal from CPU
Shumit inverter style
17
CLK
Clock input terminal from CPU
Shumit inverter style
4~10
f1~f7
Joint terminal of B.P.F.
19~25
f1~f7 X Right, Left Total 14 terminal
11
TEST1
Internal test terminal of IC
12
TEST2
It can use open condition
13
S
Select terminal for 2 tip use
"1" input, key code 7C3 - VDD joint
"0" input, key code 7C2 - VEE joint
28
NC
No use
1-16
2.Block diagram
IN2
3
IN1
f1
10
f2
9
f3
8
f4
7
f5
6
f6
5
f7
4
D1
16
CLK
17
Control
S
13
4
TEST1
+
–
2
26 IN2
Network
Resistor
Latch Circuit
Shift Resistor
1
18
14
Vdd
Vss
Vee
Function
+
–
27 IN1
19
Network
20
Resistor
21
22
23
24
25
12 TEST2
15
Vcc
f1
f2
f3
f4
f5
f6
f7
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