Yamaha CDR-HD1500 Service Manual - page 36
CDR-HD1500
36
CDR-HD1500
IC3 : YDC126-F (MAIN P.C.B.)
ACDR
No.
Name
I/O
DC Level
Function
29
AES
O
C
(Unconnected)
30
P14
I+
T
General purpose input port
31
P13
I+
T
General purpose input port
32
P12
I+
T
General purpose input port
33
P11
I+
T
General purpose input port
34
P10
I+
T
General purpose input port
35
P04
O
C
General purpose input port (Unconnected)
36
P03
O
C
General purpose input port
37
P02
O
C
General purpose input port
38
P01
O
C
General purpose input port
39
P00
O
C
General purpose input port
40
VSS
GND
41
DD15
I/O
T/C
IDE bus interface, data bus
42
DD14
I/O
T/C
IDE bus interface, data bus
43
DD13
I/O
T/C
IDE bus interface, data bus
44
DD12
I/O
T/C
IDE bus interface, data bus
45
DD11
I/O
T/C
IDE bus interface, data bus
46
DD10
I/O
T/C
IDE bus interface, data bus
47
DD9
I/O
T/C
IDE bus interface, data bus
48
DD8
I/O
T/C
IDE bus interface, data bus
49
VSS
GND
50
DD7
I/O
T/C
IDE bus interface, data bus
51
DD6
I/O
T/C
IDE bus interface, data bus
52
DD5
I/O
T/C
IDE bus interface, data bus
53
DD4
I/O
T/C
IDE bus interface, data bus
54
DD3
I/O
T/C
IDE bus interface, data bus
55
DD2
I/O
T/C
IDE bus interface, data bus
56
DD1
I/O
T/C
IDE bus interface, data bus
57
DD0
I/O
T/C
IDE bus interface, data bus
58
VDD
Power supply +5V
59
/HRST
OT
C
IDE bus interface, reset output
60
/HCS1
OT
C
IDE bus interface, chip select output
61
/HCS0
OT
C
IDE bus interface, chip select output
62
HA2
OT
C
IDE bus interface, address output
63
HA1
OT
C
IDE bus interface, address output
64
HA0
OT
C
IDE bus interface, address output
65
/H10W
OT
C
IDE bus interface, write strobe output
66
/H10R
OT
C
IDE bus interface, read strobe output
67
CSEL
OT
C
IDE bus interface, cable select output
68
IORDY
I
T
IDE bus interface, channel ready input
69
/HDACK
OT
C
IDE bus interface, DMA acknowledge output
70
HINTRQ
I
T
IDE bus interface, interrupt request input
71
/PDIAG
OD
C
IDE bus interface, connection diagnosis output
72
/DASP
OD
C
IDE bus interface, active slave output
73
HDMARQ
I
T
IDE bus interface, DMA request input
74
VSS
GND
75
SENDA
O
C
DSP3 serial data interface output 1
76
RTRNA
I+
T
DSP3 serial data interface input 1
77
SENDB
O
C
DSP3 serial data interface output 2
78
RTRNB
I+
T
DSP3 serial data interface input 2
79
SDO
O
C
Serial audio data output
80
SDI
I
T
Serial audio data input
81
VSS
GND
82
RD15
I/O
T/C
External RAM interface, data bus
83
RD14
I/O
T/C
External RAM interface, data bus
84
RD13
I/O
T/C
External RAM interface, data bus
85
RD12
I/O
T/C
External RAM interface, data bus
86
RD11
I/O
T/C
External RAM interface, data bus
87
RD10
I/O
T/C
External RAM interface, data bus
88
RD9
I/O
T/C
External RAM interface, data bus
89
RD8
I/O
T/C
External RAM interface, data bus
90
VSS
GND
91
RD7
I/O
T/C
External RAM interface, data bus
92
RD6
I/O
T/C
External RAM interface, data bus
93
RD5
I/O
T/C
External RAM interface, data bus
94
RD4
I/O
T/C
External RAM interface, data bus
95
RD3
I/O
T/C
External RAM interface, data bus
96
RD2
I/O
T/C
External RAM interface, data bus