JVC NX-HD10 Service Manual page 35

3. Pin function
Pin No. Symbol
1~8 A15~A8
9,10 NC
11 /WE
12 CE2
13 IC
14 /UB
15 /LB
16,17 NC
18~25 A7~A0
26 /CE1
27 GND
28 /OE
29 I/O1
30 I/O9
31 I/O2
32 I/O10
GP1UM271XK (IC721) : Dual operation amplifier
1. Block diagram
Amp
Function
Address inputs
No Connection
Write Enable
Chip Enable 2
Internal Connection
Byte data select
Byte data select
No Connection
Address inputs
Chip Enable 1
Ground
Output Enable
Data inputs/outputs
Data inputs/outputs
Data inputs/outputs
Data inputs/outputs
Limiter B.P.F
Pin No. Symbol
33 I/O3 Data inputs/outputs
34 I/O11 Data inputs/outputs
I/O4 Data inputs/outputs
35
36 I/O12 Data inputs/outputs
37 Vcc Power supply
38 I/O5 Data inputs/outputs
39 I/O13 Data inputs/outputs
I/O6 Data inputs/outputs
40
41 I/O14 Data inputs/outputs
42 I/O7 Data inputs/outputs
43 I/O15 Data inputs/outputs
I/O8 Data inputs/outputs
44
I/O16 Data inputs/outputs
45
46 GND Ground
47 NC No Connection
48 A16 Address inputs
Com-
Demodu- Integra-
para-
lator tor
tor
GND Vcc Vout
NX-HD10
Function
R
L
1-35