LSI 53C875A User Manual
SCSI Functional Description
2-33
Figure 2.5
Regulated Termination for Ultra SCSI
2.2.14 Select/Reselect During Selection/Reselection
In multithreaded SCSI I/O environments, it is not uncommon to be
selected or reselected while trying to perform selection/reselection. This
selected or reselected while trying to perform selection/reselection. This
TERML1
TERML2
TERML3
TERML4
TERML5
TERML6
TERML7
TERML8
TERML9
TERML2
TERML3
TERML4
TERML5
TERML6
TERML7
TERML8
TERML9
TERML10
TERML11
TERML12
TERML13
TERML14
TERML15
TERML16
TERML17
TERML18
TERML11
TERML12
TERML13
TERML14
TERML15
TERML16
TERML17
TERML18
SD0 (J1.40)
SD1 (J1.41)
SD2 (J1.42)
SD3 (J1.43)
SD4 (J1.44)
SD5 (J1.45)
SD6 (J1.46)
SD7 (J1.47)
SDP0 (J1.48)
SD1 (J1.41)
SD2 (J1.42)
SD3 (J1.43)
SD4 (J1.44)
SD5 (J1.45)
SD6 (J1.46)
SD7 (J1.47)
SDP0 (J1.48)
ATN (J1.55)
BSY (J1.57)
ACK (J1.58)
RST (J1.59)
MSG (J1.60)
SEL (J1.61)
C/D (J1.62)
REQ (J1.63)
I/O (J1.64)
BSY (J1.57)
ACK (J1.58)
RST (J1.59)
MSG (J1.60)
SEL (J1.61)
C/D (J1.62)
REQ (J1.63)
I/O (J1.64)
20
21
22
23
24
25
26
27
28
21
22
23
24
25
26
27
28
3
4
5
6
7
8
9
10
11
4
5
6
7
8
9
10
11
19
DISCONNECT
REG_OUT
2
2.85 V
UC5601QP
C1
C2
Note:
1. C1 - 10
1. C1 - 10
µ
F SMT
2. C2 - 0.1
µ
F SMT
3. C3 - 2.2
µ
F SMT
4. J1 - 68-pin, high density “P” connector
TERML1
TERML2
TERML3
TERML4
TERML5
TERML6
TERML7
TERML8
TERML9
TERML2
TERML3
TERML4
TERML5
TERML6
TERML7
TERML8
TERML9
SD15 (J1.38)
SD14 (J1.37)
SD13 (J1.36)
SD12 (J1.35)
SD11 (J1.68)
SD10 (J1.67)
SD9 (J1.66)
SD8 (J1.65)
SDP1 (J1.39)
SD14 (J1.37)
SD13 (J1.36)
SD12 (J1.35)
SD11 (J1.68)
SD10 (J1.67)
SD9 (J1.66)
SD8 (J1.65)
SDP1 (J1.39)
10
9
8
7
3
2
1
16
15
9
8
7
3
2
1
16
15
REG_OUT
14
UC5603DP
C3
6
DISCONNECT
(UC5614 for Ultra SCSI)
(UC5610 for Ultra SCSI)