Yamaha CDR-HD1500 Service Manual page 35

IC3 : YDC126-F (MAIN P.C.B.)
ACDR
/CS 1
/RD 2
/WR 3
/WAIT 4
/IRQ 5
FSCNT 6
VSS 7
D7 8
D6 9
D5 10
D4 11
D3 12
D2 13
D1 14
D0 15
VSS 16
17
A7
A6 18
A5 19
A4 20
A3 21
A2 22
A1 23
A0 24
25
VDD
SRCD1 26
/IC 27
SPD 28
AES 29
P14 30
P13 31
P12 32
33
P11
P10 34
P04 35
P03 36
P02 37
P01 38
P00 39
VSS 40
No. Name I/O
1 /CS I
2 /RD I
3 /WR I
4 /WAIT OD
5 /IRQ O
6 FSCNT O$
7 VSS
8 D7 I/O
9 D6 I/O
10 D5 I/O
11 D4 I/O
12 D3 I/O
13 D2 I/O
14 D1 I/O
15 D0 I/O
16 VSS
17 A7 I
18 A6 I
19 A5 I
20 A4 I
21 A3 I
22 A2 I
23 A1 I
24 A0 I
25 VDD
26 SRCDI I+
27 /IC I
28 SPD O
YDC126-F
DC Level Function
T Microprocessor interface, chip select input
T Microprocessor interface, read strobe input
T Microprocessor interface, write strobe input
C Wait output
C Interrupt request output
C Dividing word clock output (Unconnected)
GND
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
T/C Microprocessor interface, data bus
GND
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
T Microprocessor interface, data bus
Power supply +5V
T (Unconnected)
T Initial clear input
C Digital audio interface output (SPDIF)
CDR-HD1500
120 MUTAE
119 MUTSP
118 /CAS
117 /RAS
116 /RWE
115 /ROE
114 VSS
113 RA0
112 RA1
111 RA2
110 RA3
109 RA4
108 RA5
107 RA6
106 VSS
105 RA7
104 RA8
103 RA9
102 RA10
101 RA11
100 RA12
99 VDD
98 RD0
97 RD1
96 RD2
95 RD3
94 RD4
93 RD5
92 RD6
91 RD7
90 VSS
89 RD8
88 RD9
87 RD10
86 RD11
85 RD12
84 RD13
83 RD14
82 RD15
81 VSS
35