Yamaha SPX990 Service Manual page 15

SPX990
o
YSP99 LZ95D59 {XM047A00)
Gate
Array
PIN
NO
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
FUNCTION
1
2
NC
MCLK 0
Master
clock
41
42
A9
A8
1
1
1
CPU
address bus
3
4
DESYN
CD04
0
I
Sync
for
DEQIC
43
44
CD2
CDl
1
1
1
CARD
page
select
5
6
CD03
CD02
I
I
Control data input
45
46
CDROM
R0M4
1
1
CARD/ROM
select
7
8
CD01
CDi4
I
0
Control data output (DSP2)
47
48
ROM3
ROM2
1
1
ROM
page control
9 CD!3
0
Control data
output
(MOD) 49 ROM1
1
10 CDi2
0
Control data output
(DEQ
IC17)
50
YY2
1
1
Dividing select
11
CDI1
0
Control data output
IDEQ
IC19) 51
YY1
1
12 + Vcc 52
GND
13
GND
53 + Vcc
14
15
16
17
L4
L3
L2
LI
0
0
0
0
LED scan
pulse
54
55
56
57
S6L2
SEL1
XX2
XXI
1
1
1
1
1
Control data
select
LED
scan
data
18
LCD
0
LCD
enable 58
MDCK
0
MIDI
clock
19
KEYN 0
KEY
enable 59
TRGO 0
Trigger out
20 LED
0
LED
enable
60
E
1
21
22
CDA14
CDA13
0
0
1
CARD
address
61
62
RWN
ICN
1
1
Read
write pulse
Initial
clear
23
CARDN 0
CARD
enable
63 ACIA
0
ACIA
enable
24
GND
64
GND
25
PAWN
0
RAM
write
enable
65
TXD
1
DSP
control data input
26
RAON
0
RAM
read enable 66
RXD
0 DSP
control data output
27
RMA16
0
67
XCLK 0
Transfer clock
28
29
RMA15
RMA14
0
0
ROM
address
bank
select
68
69
WCLK
SCLK
0
0
Word
clock
Serial data transfer clock
64fs
30
RMA13 0
70
FSYNC 0 NC
31 +
Vcc
71
ADLR 0 NC
32
GND
72
GND
33
ROMN
0
ROM
read enable
73
+
Vcc
34
A16
I
74
SCLKN 0
Serial
data
sift
clock
35
A14
I
75
DCLK 0
256fs clock
36
37
A13
A12
I
I
CPU
address bus
76
77
XI
XO
1
0
Clock
input/(Xtal)
/(Xtal)
38
All
I
78
GND
39
A10
I
79 TRG!
1
Trigger input
40 NC
80
SYNCN
0
Sync
clock
18
SPX990