Yamaha SPX1000 Service Manual page 8

SPX1000
SPX1000
YM3807
(IT380700)
Modulation Data Generator
Name
I/O
Function Pin No.
Name
I/O
Function
NC
24
VSS
Power supply
ground
MDSIO
1 1
Inputs data to
add
to
the
wave-
23
CDO
0 CD
interface
serial
data
output
MDSIl
1
J
form
data inside
MOD
22
GDI
1
CD
interface
serial
data intput
MDSOO 0
-1
Outputs
MOD
internal
wave-
21
NC
MDS01 0
j
form
data with the
same
data
20
XCLK
1
CD
interface transmission clock
format
as
MDSIO.
input
MODO 0
19
XMD
1
Selects 1/16
mode
(asynchronous)
or 1/1
mode
(synchronous)
for
the
CD
interface
MODI 0
18
CRS
1
CD
counter
reset
MOD2
0
^Outputs
waveform
data
for
I
all
channels
inside
MOD.
17
CLK
1
3.2MHz
MOD3
0
16
Tc
1
Initial clear
MOD4
15
SYNCW
1
Sync
signal input.
One 64th of the
master
clock.
MODS
0
14
MOD7
0
1
Outputs waveform
data for
all
VDD
Power
supply
+5V
13
MODS
0
J
channels
inside
MOD.
•
ADC0844CCN
(XC521 001
)
A/D
CONVERTER