Acer Altos R700 Series, Service Manual

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Chapter 1 11
SCSI Interface
Item Specification
SCSI controller Adapted AIC-7899 Ultra 160
Number of SCSI channel(s) Two independent Ultra 160 SCSI channels:
SCSI Channel A: 1 SCSI connector (68-pin 16-bit Ultra 160 SCSI-3
connector on CN38)
SCSI Channel B: 1 SCSI connector (68-pin 16-bit Ultra 160 SCSI-3
connector on CN32)
Support Peripheral Type Single ended and Low Voltage Differential (LVD) devices
Support Speed Supporting up to 160MB/sec. SCSI transfers
SCSI Connectors Pin-out( J7B1, J7A1)
Connector Contact No. Signal Name Signal Name Connector Contact No.
1 +DB(12) -DB(12) 35
2 +DB(13) -DB(13) 36
3 +DB(14) -DB(14) 37
4 +DB(15) -DB(15) 38
5 +DB(P1) -DB(P1) 39
6 +DB(0) -DB(0) 40
7 +DB(1) -DB(1) 41
8 +DB(2) -DB(2) 42
9 +DB(3) -DB(3) 43
10 +DB(4) -DB(4) 44
11 +DB(5) -DB(5) 45
12 +DB(6) -DB(6) 46
13 +DB(7) -DB(7) 47
14 +DB(P) -DB(P) 48
15 GROUND GROUND 49
16 GROUND GROUND 50
17 RESERVED RESERVED 51
18 RESERVED RESERVED 52
19 RESERVED RESERVED 53
20 GROUND GROUND 54
21 +ATN -ATN 55
22 GROUND GROUND 56
23 +BSY -BSY 57
24 +ACK -ACK 58
25 +RST -RST 59
26 +MSG -MSG 60
27 +SEL -SEL 61
28 +C/D -C/D 62
29 +REQ -REQ 63
30 +I/O -I/O 64
31 +DB(8) -DB(8) 65