JVC RX-7020VBK, Service Manual

Page: 24 / 61

RX-7020VBK
1-24
NC
A16 A14 A12
A7 A6 A5 A4 A3 A2 A1 A0
I/O1 I/O2 I/O3
Vss
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
V
DD
A15 CS2 WE A13 A8 A9 A11 OE A10 CS1 I/O8 I/O7 I/O6 I/O5 I/O4
1. Pin layout
W24L010AJ-12 (IC641) : SRAM
DECODER
CORE
ARRAY
CONTROL
DATA I/O
V
DD
Vss
CS2
CS1
OE
WE
A0
A16
I/O1
I/O8
2. Block diaglam
3. Pin function
Symbol
NC
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
Vss
Function
No Connection
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Address Input
Data Input/Output
Data Input/Output
Data Input/Output
Ground Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Symbol
I/O4
I/O5
I/O6
I/O7
I/O8
CS1
A10
OE
A11
A9
A8
A13
WE
CS2
A15
VDD
Function
Data Input/Output
Data Input/Output
Data Input/Output
Data Input/Output
Data Input/Output
Chip Select Inputs
Address Input
Output Enable Input
Address Input
Address Input
Address Input
Address Input
Write Enable Input
Chip Select Inputs
Address Input
Power Supply
2 3 4 1 5
L-S1
S-2 S-3
VSS
COM-1
6 7 8 9
S-4 S-5 S-6
COM-2
10 11 12
S-7 S-8
COM3
13
ST
14
GND
27 26 25 28 24
R-S1 S-2 S-3 VDD COM-1
23
22 21 20
S-4 S-5 S-6 COM-2
19 18 17
S-7 S-8 COM3
16
DATA
15
CK
SHIFT RESISTOR
SHIFT RESISTOR
&
LATCH
SHIFT RESISTOR
&
LATCH
TC9164AN (IC402) : Analog switch
Switch to On/Off of S1 to S8 by control of LSI.
1.Function
2. Pin layout & Block Diagram