Yamaha ACU16-C, Service Manual

Page: 16 / 69

ACU16-C
16
(XV833A00) CPU
PIN
NO.
NAME I/O FUNCTION
PIN
NO.
NAME I/O FUNCTION
1 D5 I/ O 25 TX 3
MAIN: IC301
1 O
2 D6 I/ O Data bus 26 RX32 I
3 D7 I/ O 27 TX 32 O
Serial data
4 /I RQ0 I /O Inter r upt request 28 RX33 I
5 /I RQ1 I /O Inter r upt request 29 TX 33 I /O
6 VSS6 Gr ound 30 /I C I Initial Clear
7 /I RQ2 I /O Inter rupt request 31 VSS31 Gr ound
8 /I RQ3 I /O Inter rupt request 32 XI I Cr ystal quar ts input
9 /RD I Read 33 VSS33 Gr ound
10 /WR I Wr i t e 34 XO O Cr ystal quar ts output
11
/CE I Chi p enable
35
A0 I
12 /ASTB I 36 A1 I
13 TE STI 0 I Test mode 37 A2 I
14
RX0 I
38
A3 I
Address bus
15 TX 0 O 39 A4 I
16 RX1 I
Serial data
40 A5 I
17
TX 1 O
41
CPU CLK I Clock
18 VSS18 Gr ound 42 VSS42 Gr ound
19 VDD19 Power suppl y 43 VDD43 Power suppl y
20 RX2 I 44 D0 I/ O
21 TX 2 O 45 D1 I/ O
22
RX30 I Serial data
46
D2 I/ O Data bus
23 TX 30 O 47 D3 I/ O
24 RX31 I 48 D4 I/ O
MBCG46183-129PFV-G
PIN
NO.
I/O FUNCTION NAME
PIN
NO.
I/O FUNCTION NAME
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
DQ1
DQ0
~W
~R
A0
S0
~IBF0
OBF0
CNVSS/VPP
~RESET
P51
P50
VSS
XIN
XOUT
VCC
AVCC
LPF
AVSS
P44
P43
P42
P41
P40
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
P37
P36
P35
P34
P33
P32
P31
P30
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I/O
I/O
I
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
I/O
I/O
I/O
I/O
I/O
I/O
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
POWER SUPPLY
RESET INPUT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
POWER SUPPLY
CLOCL INPUT
CLOCK OUTPUT
POWER SUPPLY
ANALOG POWER SUPPLY
ROOP FILTER
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT 41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80 P17
P16
P15
P14
P13
P12
P11
P10
PO7
PO6
PO5
PO4
PO3
PO2
PO1
PO0
P27
P26
P25
P24
P23
P22
P21
P20
P74
P73
P72
P71
P70
USB_D+
USB_D-
EXT.CAP
VSS
VCC
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
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
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
I/O
I/O
I/O
I/O
I/O
I/O
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
5 bit INPUT/OUTPUT PORT
USB D+ VOLTAGE
USB D- VOLTAGE
LINE POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
8 bit INPUT/OUTPUT PORT
M37641M8-140FP (X2485100) CPU
MAIN: IC316