Yamaha D24 Service Manual page 26

uPD72611GF-3BA (XU375A00) SCSI Controler
PIN
NAME I/O
NO.
1 /32B I 32-bit bus
2 /16B I 16-bit bus
3 A3 I Address 3
4 A2 I Address 2
5 A1//BE3 I Address 1 / byte enable 3
6 A0//BE2 I Address 0 / byte enable 2
7 /BE1 I Byte enable 1
8 /BE0//UBE I Byte enable 0 / upper byte enable
9 DP3 I/O
10 DP2 I/O
Data bus
11 DP1 I/O
12 DP0 I/O
13 GND0 - Ground
14 D31 I/O
15 D30 I/O Data bus
16 D29 I/O
17 VDD - Power supply
18 D28 I/O
19 D27 I/O
Data bus
20 D26 I/O
21 D25 I/O
22 GND0 - Ground
23 D24 I/O
24 D23 I/O
25 D22 I/O
26 D21 I/O Data bus
27 D20 I/O
28 D19 I/O
29 D18 I/O
30 GND0 - Ground
31 D17 I/O
32 D16 I/O
33 D15 I/O
Data bus
34 D14 I/O
35 D13 I/O
36 D12 I/O
37 VDD - Power supply
38 D11 I/O Data bus
39 GND0 - Ground
40 GND0 - Ground
41 D10 I/O Data bus
42 VDD - Power supply
43 D9 I/O
44 D8 I/O
45 D7 I/O
Data bus
46 D6 I/O
47 D5 I/O
48 D4 I/O
49 GND0 - Ground
50 D3 I/O Data bus
FUNCTION
PIN
NAME I/O
NO.
51 D2 I/O
52 D1 I/O Data bus
53 D0 I/O
54 GND1 - Ground
55 /SBP I/O SCSI bus parity
56 /SB0 I/O SCSI bus
57 /SB1 I/O SCSI bus
58 GND1 - Ground
59 /SB2 I/O SCSI bus
60 /SB3 I/O SCSI bus
61 GND1 - Ground
62 /SB4 I/O SCSI bus
63 /SB5 I/O SCSI bus
64 GND1 - Ground
65 /SB6 I/O SCSI bus
66 /SB7 I/O SCSI bus
67 GND1 - Ground
68 /ATN I/O Attention
69 /ACK I/O Acknowledge
70 /REQ I/O Request
71 GND1 - Ground
72 /MSG I/O Massage
73 /C/D I/O Command/Data
74 /I/O I/O Input/output
75 GND1 - Ground
76 /BSY I/O Busy
77 /SEL I/O Select
78 /RST I/O Reset
79 GND1 - Ground
80 SBOE O SCSI bus out enable
81 /SBIE O SCSI bus in enable
82 IDSTR O ID strobe
83 INIT O Initiator
84 TGT O Target
85 BSYO O Busy out
86 SELO O Select out
87 RSTO O Reset out
88 CLK I Clock
89 /RESET I Reset
90 GND0 - Ground
91 GND0 - Ground
92 /CS I Chip select
93 VDD - Power supply
94 /EOP O End of process
95 INT O Interrupt request
96 /IOWR I I/O write
97 /IORD I I/O read
98 /DMARQ O DMA request
99 /DMAAK I DMA acknowledge
100 GND0 - Ground
D24
MAIN: IC318
FUNCTION
26