Yamaha tx81z Service Manual page 30

TX81Z
LSI
DATA
TABLE
•
YM2414 (XB7630Cm
Operator
PIN
NO
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
FUNCTION
1
V
55
GNO 24
LtM
1
Clock 3.59
MH*
2
TRQ
o
Inlerrupt data
23
9
T
1
Synchro
pulse
for
DAC
3
m
1
Initial
clear
22
VDD
1
DC
Supply
1
+ 5V|
4 Add
1
AdJrpss
bus
21
SO
O
T
one
signal
data
5 WFT
F
Write control
20
SHI
o
Sample and bold (Chi]
6
Wd
1
Read
control 19
SH2 0 Sample and
bold (Ch2]
7
cs
t
Chip
Select
13
07
I/O
3
CTl
0
Control data oul
1
IT
03
I/O
9 CT2 o
Control data yvl 2
1
DS
I/O
Data bej
10 DO
I/O Data.
hu$ 15
04
I/O
1 1
Vi5
GND
14
03
I/O
12
1
I/O Oat
a
bus
13
D2
I/O
J
•
HD
63
BQ 3
XP
(IG
14
Q 80
O) Central Processing Unit
PIN
NO.
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
r
FUNCTION
1
Vss
1
Ground
33
Vdc
DC
Supply (+6V)
2
3
XT
AL
EXTAL
1
1
Clock
34
35
A16
A14
o
0
;
4
MPO
1
Mode program
36
A13 0
5 MP1
1
37
A12
0
Arid
l
ess
bus
6
RES
i
r
Renat
33 A1
1
0
7
ST BY
i
Stand-by
mode
signa
1
30
A10 o
3
fiffl
i
Non-maskable interrupt
40
A9
o
9 P20
I/O 4]
AS
o
10
P21 I/O
42
Vs$
round
1
P22
I/O 43
A7
o
V2
P23
I/O
Port
2
44 AS
o
13
P24
I/O
45
A&
0
14
15
P25
P2S
I/O
I/O
46
47
A4
A3
0
0
1
Address bus
16 P27
I/O
45 A
2
0
17
P50
I/O 49 A1
0
1
P51 I/O 50
AO 0
19
P52
I/O
St
07
I/O
20
P53
I/O
Port 5
52
06
I/O
21
P54
I/O
53
D5
I/O
22
26
PS5
P56
I/O
I/O
54
55
04
03
I/O
I/O
Da
ta
bos
24
P57
I/O
56
02
I/O
25
PGO
I/O
57
or
I/O
26
P6t I/O 50
DO
I/O
27
P62
I/O
59
BA 0
Bus available
23 P03
I/O
Part
6
60
Lift
o
Load
Instruction
resistor
20
PS4
I/O
61
RAN
0
Read Write
control
30
P65
I/O 62
WR
0
Write
31
P66
I/O
33
RO
0
Read
32
P67
I/O
64 E
0
Enable
30