JVC TH-A75R Service Manual page 33

4.15 GP1FA351RZ (J5521) : Fiber optic receiver
• Pin layout
4.16 GP1UM271XK (IC402) : IR detecting unit for remote control
4.17 IS63LV102410K-X (IC525/IC526/IC527) : SRAM
• Pin layout
A0 1
A1 2
A2 3
A3 4
CE 5
I/O0 6
I/O1 7
Vcc 8
GND 9
I/O2 10
I/O3 11
WE 12
A4 13
A5 14
A6 15
A7 16
• Pin function
Pin No. Symbol
1-4 A0-A3
5 CE
6,7 I/O0,I/O1
8 Vcc
9 GND
10,11 I/O2,I/O3
12 WE
Amp
Limiter B.P.F
32 A16
31 A15
30 A14
29 A13
28 OE
27 I/O7
26 I/O6
25 GND
24 Vcc
23 I/O5
22 I/O4
21 A12
20 A11
19 A10
18 A9
17 A8
I/O Function
I Address inputs
I Chip enable input
I/O Bidirectional ports
- Power
- Ground
I/O Bidirectional ports
I Write enable input
• Block diagram
AMP
AMP
AMP
Comp & Output circuit
Com-
Demodu- Integra-
para-
lator tor
tor
GND Vcc Vout
• Block diagram
A0-A16
DECODER
VCC
GND
I/O
I/O0-I/O7 DATA
CIRCUIT
CE
CONTROL
OE
CIRCUIT
WE
Pin No. Symbol
13-21 A4-A12
22,23 I/O4,I/O5
24 Vcc
25 GND
26,27 I/O6,I/O7
28 OE
29-32 A13-A16
V
CC
V
AMP OUT
GND
R
L
128K X 8
MEMORY ARRAY
COLUMN I/O
I/O Function
I Address inputs
I/O Bidirectional ports
- Power
- Ground
I/O Bidirectional ports
I Output enable input
I Address inputs
(No.21189)1-33
TH-A75R