Yamaha MU100, Service Manual

Page: 12 / 38

LSI PIN DESCRIPTION
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
O
O
-
-
-
O
O
O
O
-
O
O
O
O
O
O
O
O
-
O
O
O
O
O
O
O
O
-
O
I
O
O
I
O
-
-
O
O
-
I/O
I/O
I/O
I/O
-
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
-
I/O
I/O
I/O
I/O
-
O
O
I
I
O
O
CS1
CS0
Vss
Vss
Vcc
A0
A1
A2
A3
Vss
A4
A5
A6
A7
A8
A9
A10
A11
Vss
A12
A13
A14
A15
A16
A17
A18
A19
Vss
A20
PA5
PA6
PA7
P67
P66
Vss
Vss
P65
P64
Vcc
D0
D1
D2
D3
Vss
D4
D5
D6
D7
D8
D9
D10
D11
Vss
D12
D13
D14
D15
Vcc
TXD0
TXD1
RXD0
RXD1
P34
P35
NAME
Chip Select for System RAM (CS1)
Chip Select for System RAM (CS0)
GND
Power Supply
Address Bus
GND
Address Bus
GND
Address Bus
GND
Address Bus
Off Line Detection
Signal for Rotary encoder(REB)
Signal for Rotary encoder(REA)
Plug Detection of A/D Input
NC
GND
GND
Reset Signal for SWP30
Reset Signal for PB
Power Supply
Two Way Data Bus
GND
Two Way Data Bus
GND
Two Way Data Bus
Power Supply
Serial MIDI OUT (TXD0)
Serial Host OUT (TXD1)
Serial MIDI IN B (RXD0)
Serial MIDI IN A (RXD1) or Host IN
A/D Gain Control Signal(ADG1)
A/D Gain Control Signal(ADG2)
FUNCTION
MU100
12
HD6432655A00F (XT443A00) CPU
PIN
NO.
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
I/O
-
O
-
-
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
-
-
-
O
O
O
O
O
O
O
O
I
-
-
O
O
I
I
I
I
I
I
I
I
I
I
-
-
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
O
O
O
Vss
P60
Vss
Vss
P61
P62
P63
P27
P26
P25
P24
P23
P22
P21
P20
WDT0VF
RES
NMI
STBV
Vcc
XTAL
EXTAL
Vss
Vcc
AS
RD
HWR
LWR
PF2
PF1
PF0
TXD2
RXD2
Vss
Vss
SCK2
P53
AVcc
Vref
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVss
Vss
P17
P16
P15
P14
P13
P12
P11
P10
MD0
MD1
MD2
PG0
CS3
CS2
NAME
GND
NC
GND
GND
NC
PB Select (SW1)
PB Select (SW2)
NC
1 MHz Clock for Serial Interface
LCD Contrast (LCDC-C)
LCD Contrast (LCDC-B)
LCD Contrast (LCDC-A)
LCD Control (LCD-E)
LCD Control (LCD-R/W)
LCD Control (LCD-RS)
NC
Reset Signal
not used
not used
Power Supply
Quartz Cristal 16 MHz
Quartz Cristal 16 MHz
GND
NC
Power Supply
NC
Read Signal
Write Signal
NC
PB Select (SW4)
SW Data Read Control (SWD)
LED,SW Strobe Data Latch (SWS)
Serial Output for PB (TXD2)
Serial Input for PB (RXD2)
GND
GND
Serial Sync Clock for PB (MIDCLK)
Reset Signal for Rotary Encoder
Power Supply for A/D
Reference Voltage for A/D
Analog Level Input R
not used
Analog Level Output L
not used
Detection of Host SW Position
not used
Battery Voltage Check
ModelCheck (MU100:GND)
GND
GND
LCD Data(DB7),SW Data,LED6
LCD Data(DB6),SW Strobe Data
LCD Data(DB5),SW Strobe Data
LCD Data(DB4),SW Data,LED5
LCD Data(DB3),SW Data,LED4
LCD Data(DB2),SW Data,LED3
LCD Data(DB1),SW Data,LED2
LCD Data(DB0),SW Data,LED1
GND
GND
+5 D
PB Select (SW3)
NC
Chip Select for SWP30 (CS2)
FUNCTION