Yamaha TX-550 - Microcomputer Data (µ-COM)

TX-550
TX-550
i^i-COM
DATA
(LC66306A-4725:IC2)
(4-bit
Microcomputer)
POO
[
P01
^
P02
^
P03
[
P10
QI|
P11
CL
P12
CE
P13
CL
SIO/P20
nr
$oo/
P2i
QL
SCK0/P22
rrr
1NTQ/
P23
m
INT1/P30
QL
POUTO/P31
CH
POUT1/P32
UL
HOLD/P33
Ql]
P40
QI
P41
TEST
d
vss
QLl
osci
cn
TTl
PE1/TRB
Til
PEO/TRA
jL
vdd
H]
PD3/CMP3
"sTI
P02/CMP2
~37l
PD1/CMP1
in
PDO/CMPO
^
PC3/VREC#1
m
PC2/VRE#0
pn
P63/PIN1
!H]
P62/SCK1
[m
P61/S01
ID
P60/
SI1
ID
P53/INT2
ID
P52
^
P51
pn
P50
pn
P43
P42
^
RES
ID
OSC2
Pin
No.
Terminal
Name
I/O
Function Pin
No. Terminal
Name
I/O
Function
1
POO
I/O
BLEND
22
0SC2
0
—
2
P01
I/O
MUTE
23
RES I
—
3 P02
I/O
STIN
24
P42
I/O
FM
4 P03
I/O
WIDE
25
P43
I/O
FM
5
P10
I/O INH
26
P50
I/O
Key Input
(K1)
6 P11
I/O
AO
27 P51
I/O
Key Input
(K2)
7
P12
I/O
A1
28
P52
I/O Key
Input
(K3)
8
P13
I/O STEREO
29
P53
I/O
Key Input
(K4)
9 P20
I/O
30 P60
I/O
Key
Input
{D1
)
10 P21
I/O DATA
31
P61
I/O
Key
Input
(D2)
11
P22
I/O
CL
32
P62
I/O
1
Key
Input
(D3)
12 P23
I/O
CE
33
P63
I/O
'Key Input
ID4)
13
P30
I/O
STRQ
34
PC2
I/O
—
14
P31
I/O
CE82
35
PC3
I/O
Key
Input
(D5)
15
P32
I/O
CE83
36
PDO
I
Tuning
DOWN
16 P33
I
HOLD
37
PD1
I
Tuning UP
17
P40
I/O
STO
38
PD2
I
Remote
Control
Input
18 P41
I/O
MONO
39
PD3
I
24
Preset/40
Preset
19 TEST
I
-
40
VDD
VDD
20
VSS
-
41
PEO
I
—
21
OSCI
I
-
42
PEI
I
1
11