HPC3130A
PCI HOT PLUG CONTROLLER
SCPS055 – NOVEMBER 1999
Terminal Functions (Continued)
slot control and status functions
TERMINAL
NO.
120
NO.
128
NO.
144
I/O
FUNCTION
NAME
ATTN0[3]
ATTN0[2]
ATTN0[1]
ATTN0[0]
ATTN1[3]
ATTN1[2]
ATTN1[1]
ATTN1[0]
1
103
83
65
2
104
84
66
2
110
88
70
3
111
89
71
1
124
98
80
3
125
99
81
Attentionindicators. These two outputs are provided per slot as attention indicators and can
be independently programmed to drive high, low, fast blink, and slow blink. The timer is
based on the PCI clock frequency and the state of SYSM66EN.
O
BUSON[3]
BUSON[2]
BUSON[1]
BUSON[0]
119
100
81
126
107
86
142
121
96
CBT switch control for PCI bus. This output controls the CBT switch that connects the
hot-plug slot to the system PCI bus. This output is only driven by the HPC3130A under
programmed control.
O
O
63
68
77
CLKON[3]
CLKON[2]
CLKON[1]
CLKON[0]
120
102
82
127
109
87
144
123
97
PCI clock connection control. This output is used to control the CBT switch or clock driver
that connects the hot-plug slot to the system PCI clock. This output is only driven by the
HPC3130A under programmed control.
64
69
79
Card detection signals. These two card detect input signals, DETECT0 and DETECT1, are
provided as additional card detection signals to the PRSNT1 and PRSNT2. Since only one
present input must be tied to ground to indicate a card is present per the PCI Specification,
theseoptionalinputsareprovidedfordesignersofamoremechanicallyrobustsystem. Ifthe
protectionenable bit is set to 1 in the general configuration register, the HPC3130A does not
power a hot-plug slot unless DETECT0 and DETECT1 are input low. A design not
implementingadditionalcarddetectionmusttiethesesignalstoground. Whenthisfeatureis
utilized, the HPC3130A guarantees that power can not be applied to an empty slot or a slot
with a partially inserted card.
DETECT0[3]
DETECT0[2]
DETECT0[1]
DETECT0[0]
DETECT1[3]
DETECT1[2]
DETECT1[1]
DETECT1[0]
4
106
87
69
5
108
88
70
5
113
92
74
6
115
93
75
7
127
102
84
I
8
129
104
85
M66EN[3]
M66EN[2]
M66EN[1]
M66EN[0]
3
105
86
4
5
PCI bus frequency indicator. This signal indicates the PCI clock frequency requirements of
the hot-plug slots and is only required in a 66-MHz system (two slot maximum electrical
loading limits). The two slot interfaces that provide the M66EN terminals are sensed at PCI
reset and are driven afterwards.
112
91
72
126
101
82
I
I
67
PRSNT1[3]
PRSNT1[2]
PRSNT1[1]
PRSNT1[0]
PRSNT2[3]
PRSNT2[2]
PRSNT2[1]
PRSNT2[0]
113
94
75
55
114
96
120
101
80
134
115
90
Presentsignals. Theseinputsareprovidedbyhot-plugslotstoindicatethatanadd-incardis
physically present in the slot and to power requirements to the system. Only one of these
signals must be tied to ground to indicate a card is present in an expansion slot. A set of
PRSNT1 and PRSNT2 inputs are provided for each hot-plug slot.
58
64
121
103
81
135
117
91
76
57
60
66
PWRFAULT[3]
PWRFAULT[2]
PWRFAULT[1]
PWRFAULT[0]
110
92
72
117
99
77
131
111
87
Power fault. This input is provided per slot power switch to indicate if there is a power fault.
The HPC3130A can be programmed to generate an interrupt through INTR when this input
is asserted.
I
I
53
56
62
PWRGOOD[3]
PWRGOOD[2]
PWRGOOD[1]
PWRGOOD[0]
111
93
73
54
118
100
78
132
113
88
Power good. This input is provided per slot power switch to indicate when power is
successfullyswitched. TheHPC3130Acanbeprogrammedtogenerateaninterruptthrough
INTR when this input is asserted.
57
63
14
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