Yamaha PORTATONE PSR-740 Service Manual page 7

YSS236-F (XT013A00) VOP3
PIN
NAME I/O
NO.
1 VSS Power supply
2
WA17 O
3 WA16 O
4 WA15 O
5 WA14 O
External memory address bus
6 WA13 O
7 WA12 O
8 WA11 O
9 WA10 O
10 VDD Ground
11 VSS Power supply
12 WA09 O
13 WA08 O
14 WA07 O
15 WA06 O
External memory address bus
16 WA05 O
17 WA04 O
18 WA03 O
19 WA02 O
20 VDD Ground
21 VSS Power supply
22 WA01 O
External memory address bus
23 O
WA00
24 WEN O External memory control (WEN)
25 OEN O External memory control (OEN)
26 RASN O External memory control (RASN)
27 CASN O External memory control (CASN)
28 CEN O External memory control (CEN)
29 VDD Ground
30 VSS Power supply
31 WD19 I/O
32 WD18 I/O
33 WD17 I/O
External memory data bus
34 WD16 I/O
35 WD15 I/O
36 WD14 I/O
37 VDD Ground
38 VSS Power supply
39 WD13 I/O
40 WD12 I/O
41 WD11 I/O
42 WD10 I/O External memory data bus
43 WD09 I/O
44 I/O
WD08
45 WD07 I/O
46 VDD Ground
47 VSS Power supply
48 WD06 I/O
49 WD05 I/O
50 WD04 I/O
51 WD03 I/O External memory data bus
52 WD02 I/O
53 WD01 I/O
54 WD00 I/O
55 VDD Ground
56 VSS Power supply
57 TST2 O
58 TST1 O Test output
59 TST0 O
60 MS I Memory select
61 LRCLK O LR clock for ADC
62 SI7 I
Serial input
63 SI6 I
64
VDD Ground
65 VSS Power supply
66 SI5 I
67 SI4 I
68 SI3 I
Serial input
69 SI2 I
70 SI1 I
71 SI0 I
72 DB1 I
Output bit type select for DAC
73 DB0 I
74 VDD Ground
75 VSS Power supply
76 ODFM I Output mode select for DAC
77 OFS3 I
78 OFS2 I
Serial output format select
79 OFS1 I
80 OFS0 I
FUNCTION
PIN
NAME I/O
NO.
81 SO7 O
82
SO6 O Serial output
83 SO5 O
84 VDD Ground
85 VSS Power supply
86 SO4 O
87 SO3 O
88 SO2 O Serial output
89 SO1 O
90 SO0 O
91 WDCK O Data enable for DAC
92 SWPKON O SWP00 format key on output
93 IRQN O EG interrupt
94 VDD Ground
95 VSS Power supply
96 XTAL_I I Quartz crystal terminal
97 XTAL_O O Quartz crystal terminal
98 MCLK O Oscillate clock output
99 VDD Ground
100 VSS Power supply
101 MICN I Initial clear
102 CLKIN I Master clock input
103 I
SYWIN Sync.signal input
104 SYW O Sync.signal output
105 SYWD O Sync.signal output
106 VDD Ground
107 VSS Power supply
108 CLKO O For test (512 fs output)
109 WCLK O 2 times sync.clock output (256 fs)
110 HCLK O 4 times sync.clock output (128 fs)
111 QCLK O 8 times sync.clock output (64 fs)
112 TSTCI I PLL test input
113 VDD Ground
114 VSS Power supply
115 (NC)
116 VDD(PLL)
117 CPO O PLL control output
118 CPIN I PLL control input
119 REF I PLL control intput
120 VSS(PLL)
121 (NC)
122 VDD Ground
123 VSS Power supply
124 TSTCS I
PLL test input
125 CA6 I
126 CA5 I
CPU address bus
127 CA4 I
128 CA3 I
129 CA2 I
130 VDD Ground
131 VSS Power supply
132 CA1 I CPU address bus
133 CA0 I Lo/Hi select in 8 bits write
134 CSN I Chip select
135 RDN I Register read
136 WRN I Register write
137 BTYP Data bus type select
138 VDD Ground
139 VSS Power supply
140 CD15 I/O
141 CD14 I/O
142 CD13 I/O CPU data bus
143 CD12 I/O
144
CD11 I/O
145 VDD Ground
146 VSS Power supply
147 CD10 I/O
148 CD09 I/O
149 CD08 I/O
CPU data bus
150 CD07 I/O
151 CD06 I/O
152 CD05 I/O
153 VDD Ground
154 VSS Power supply
155 CD04 I/O
156 CD03 I/O
157 CD02 I/O CPU data bus
158 CD01 I/O
159 CD00 I/O
160 VDD Ground
PSR-740/PSR-640
FUNCTION
17