Yamaha PORTATONE PSR-170 Service Manual page 10

www.freeservicemanuals.info
PSR-170
LSI PIN DESCRIPTION
YMW728-F (XU355A00) GEW12 (AWM Tone Generator)
PIN
NAME I/O
NO.
1 PL0 I/O
2 PL1 I/O
3 PL2 I/O
4 PL3 I/O Port L
5 PL4 I/O
6 PL5 I/O
7 PL6 I/O
8 Vdd Power supply
9 PA0 I/O
10 PA1 I/O
11 PA2 I/O
Port A
12 PA3 I/O
13 PA4 I/O
14 PA5 I/O
15 PB0 I/O
16 PB1 I/O
17 PB2 I/O
Port B
18 PB3 I/O
19 PB4 I/O
20 PB5 I/O
21 Vss Ground
22 PC0 I/O
23 PC1 I/O
24 PC2 I/O
Port C
25 PC3 I/O
26 PC4 I/O
27 PC5 I/O
28 PD0 I/O
29 PD1 I/O
30 PD2 I/O
Port D
31 PD3 I/O
32 PD4 I/O
33 PD5 I/O
34 Vdd Power supply
35 PE0 I/O
36 PE1 I/O
37 PE2 I/O
Port E
38 PE3 I/O
39 PE4 I/O
40 PE5 I/O
41 TESTE I Test Mode E
42 TESTD I Test Mode D
43 Vss Ground
44 DACLMM O 1bit DAC Output L (-)
45 DACLPP O 1bit DAC Output L (+)
46 DACRPP O 1bit DAC Output R (+)
47 DACRMM O 1bit DAC Output R (-)
48 DAC_Vss Ground
49 X_O O Crystal quarts Output
50 X_I I Crystal quarts Input
10
PIN
FUNCTION
NO.
51 DAC_Vdd
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 ROMLOEN O
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Digitized in Heiloo the Netherlands
NAME I/O FUNCTION
Power supply
SYI I Synch. signal
ICN I Inicial Clear
Vss Ground
MA19 O
MA18 O Memory address bus
MA8 O
Vdd Power supply
MA17 O
MA9 O
MA7 O
Memory address bus
MA10 O
MA6 O
MA11 O
Vss Ground
MA5 O
MA12 O
MA4 O
Memory address bus
MA13 O
MA3 O
MA14 O
Vdd Power supply
MA2 O
MA15 O
MA1 O
Memory address bus
MA16 O
MA0 O
MA20 O
Vss Ground
OEN pin
MD15 I/O
MD0 I/O
MD7 I/O
MD8 I/O
Memory data Input / output
MD14 I/O
MD1 I/O
MD6 I/O
MD9 I/O
Vdd Power supply
MD13 I/O
MD2 I/O
MD5 I/O
MD10 I/O
Memory data Input / output
MD12 I/O
MD3 I/O
MD4 I/O
MD11 I/O
Vss Ground
MIDII I MIDI Input
MIDIO O MIDI Output
DM-LCD : IC001
Not for sale!
3/24/2019