Yamaha SPX50D Service Manual page 8

SPX50D
•
HD6303Y
(XE386A00)
CPU
PIN
NO.
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
FUNCTION
1
Vss
1
Ground
33
Vcc
DC
Supply
2
XTAL
1
1
Clock
34
V15
o
3
EXTAL
1
35
A14 0
4
MPO
1
..
.
36
A13
0
5
6
MP1
RES
1
1
jMoae
program
Reset
37
38
A12
All
0
0
rAddress bus
7
STBY
1
Stand-by
mode
signal
39
A10
o
8
NMi
1
Non-maskable
interrupt
40
A9
o
9
P20
I/O
'I
41
A8
0
.
10
P21 I/O 42 Vss
Ground
11
P22
I/O
43
A7
0
12
P23
I/O yPort 2 44
A6 0
13
P24
I/O
45
A5
0
14
15
P25
P26
I/O
I/O
46
47
A4
A3
0
0
Address bus
16
P27
I/O 48
A2
0
17
P50
I/O
*
49 A1
0
18
P51
I/O 50
AO 0
>
19
P52
I/O 51
D7
I/O
20 P53 I/O
Port 5
52
D6
I/O
21
P54
I/O 53
D5
I/O
22
23
P55
P56
I/O
I/O
54
55
D4
D5
I/O
I/O
Data
bus
24 P57 I/O
J
56
D2
I/O
25
P60
I/O
57 D1
I/O
26 P61 I/O 58
DO
I/O
27
P62
I/O 59
BA 0
Bus
available
28
29
P63
P64
I/O
I/O
'Port 6
60
61
LIR
R/W
o
o
Load
instruction resistor
Read/Write
control
30
P65
I/O 62
WR
0
Write
31
P66
I/O
63
RD o
Read
32
P67
I/O 64
E
0
Enable
•
HD63B50P
(IG1
47300) Asynchronous Communications
Interface
Adapter
PIN
NO.
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
FUNCTION
1
Vss
DC
supply
OV
13
R/W
1
Read/Write
2
Rx
Data
1
Receive data 14
E
1
Enable
3
Rx CLK
1
Receive clock 15
D7
I/O
4
Tx CLS
O
Transmit clock
16
D6
I/O
5
rTs
I/O
Request
to
send 17
D5
I/O
6
Tx
Data
0
Transmit data 18
D4
I/O
Data bus
7
IRQ
1
Interrupt request 19
D3
I/O
8
CSO
1
1
20
D2
I/O
9
CS2
1
>
Chip
select 21
D1
I/O
10
CS1
1
J
22
DO
I/O
11
RS
1
Resist select
23
DCD
1
Data
carrier
detect
12
Vcc
DC
supply (+5.0VI 24
CTS
1
Clear
to
send
•
PCM54HP
(XA566001
)
Digital
to
Analog Converter
Pin
No.
Name
I/O Function
Pin
No.
Name
I/O Function
1
Vpot Not
used
15
DA4
Bit
13
2
DA16
Bit
1
(MSB)
16
DA3
Bit
14
3
DA15
Bit
2
17
DA2
Bit
15
4
NC
Not
used
18
DAI
Bit
16 (LSB)
5
DA14
Bit 3
19
VOUT
Voltage Output
6
DA13
Bit
4
20
FBR
Not
used
7
DA12
Bit
5
21
s/v
Summing
Junction
8
DA11
Bit 6
22
COM
Common
9
DA10
Bit
7
23
1
OUT
Current
Output
10
DA9
Bit
8
24
NC
Not Used
11
DAS
Bit 9
25
OFFS
Not Used
12
DA7
Bit 10
26 +Vcc +15V
13
DA6
Bit 11
27
ADJ
Not
used
14
DAB
Bit
12
28
—Vcc
-15V
8