HPC3130A Datasheet, PDF (14/41 Pages) Texas Instruments – PCI HOT PLUG CONTROLLER

HPC3130A
PCI HOT PLUG CONTROLLER
SCPS055 – NOVEMBER 1999
Terminal Functions (Continued)
slot control and status functions
TERMINAL
NAME
NO. NO. NO. I/O
120 128 144
FUNCTION
ATTN0[3]
ATTN0[2]
ATTN0[1]
ATTN0[0]
ATTN1[3]
ATTN1[2]
ATTN1[1]
ATTN1[0]
1
2
1
103 110 124
83
65
2
104
88
70
3
111
98
80
3
125
Attention indicators. These two outputs are provided per slot as attention indicators and can
O 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.
84
89
99
66
71
81
BUSON[3]
BUSON[2]
BUSON[1]
BUSON[0]
119 126 142
100 107 121
81
86
96
63
68
77
CBT switch control for PCI bus. This output controls the CBT switch that connects the
O hot-plug slot to the system PCI bus. This output is only driven by the HPC3130A under
programmed control.
CLKON[3]
CLKON[2]
CLKON[1]
CLKON[0]
120 127 144
102 109 123
82
87
97
64
69
79
PCI clock connection control. This output is used to control the CBT switch or clock driver
O that connects the hot-plug slot to the system PCI clock. This output is only driven by the
HPC3130A under programmed control.
DETECT0[3]
DETECT0[2]
DETECT0[1]
DETECT0[0]
DETECT1[3]
DETECT1[2]
DETECT1[1]
DETECT1[0]
4
5
7
106 113 127
87
92 102
69
74
84
5
6
8
108 115 129
88
93 104
70
75
85
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,
these optional inputs are provided for designers of a more mechanically robust system. If the
I protection enable 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
implementing additional card detection must tie these signals to ground. When this feature is
utilized, the HPC3130A guarantees that power can not be applied to an empty slot or a slot
with a partially inserted card.
M66EN[3]
M66EN[2]
M66EN[1]
M66EN[0]
3
4
5
105 112 126
86
91 101
67
72
82
PCI bus frequency indicator. This signal indicates the PCI clock frequency requirements of
I
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.
PRSNT1[3]
PRSNT1[2]
PRSNT1[1]
PRSNT1[0]
PRSNT2[3]
PRSNT2[2]
PRSNT2[1]
PRSNT2[0]
113 120 134
94 101 115
75
80
90
55
58
64
114 121 135
96 103 117
76
81
91
57
60
66
Present signals. These inputs are provided by hot-plug slots to indicate that an add-in card is
I
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.
PWRFAULT[3] 110 117 131
PWRFAULT[2] 92
99
111
PWRFAULT[1] 72
77
87
PWRFAULT[0] 53
56
62
Power fault. This input is provided per slot power switch to indicate if there is a power fault.
I The HPC3130A can be programmed to generate an interrupt through INTR when this input
is asserted.
PWRGOOD[3] 111 118 132
PWRGOOD[2] 93 100 113
PWRGOOD[1] 73
78
88
PWRGOOD[0] 54
57
63
Power good. This input is provided per slot power switch to indicate when power is
I successfully switched. The HPC3130A can be programmed to generate an interrupt through
INTR when this input is asserted.
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