Hot-Plug PCI Indicator Board Interface (J3D1)

The Hot-Plug PCI Indicator Board (HPIB) contains the necessary LEDs and pushbutton switches to help the user run PCI Hot-Plug (PHP) operations.

To indicate slot status, each PHP slot contains a green LED and amber LED. The actual interpretation of the LEDs depends on the operating system running on the system.

Each PHP slot also has a momentary pushbutton switch. When you push this button, the SKA4 baseboard notifies the operating system that a PHP operation on the respective slot is requested. If PHP operation is supported by the operating system, the user momentarily presses the switch and then waits for the operating system to signal via the LEDs that the PHP slot has been disabled. The user can then perform the desired PHP operation on the slot, such as replacing, removing, or adding a PCI adapter. When the user wants the operating system to enable and initialize the PHP slot, the user momentarily presses the switch again.

This (Active Low) pushbutton switch for the respective slot is routed to the PRSNT1# input to the PCI Hot-Plug Controller (PHPC). This switch should not be confused with slot-interlock switches, which are used in conjunction with mechanical lever designs to prevent access to an energized PHP slot. The slot interlock inputs into the PHPC are permanently pulled down to ground and are not accessible through the Hot-Plug PCI Indicator Board interface.

✏NOTE

The HW push button is located on the Hot-Plug Indicator board. Do not use this button to turn power on and off to the PCI slot. In some instances, pushing this button interrupts normal operation of the operating system. Instead, turn power off using a Hot-Plug PCI application.

The Hot-Plug PCI Indicator Board interface contains the necessary signals to drive the LEDs and receive the pushbutton signals.

A 20-pin connector is provided on the baseboard for connection to the external HPIB. The pin out for this connector is given in the table below.

Table 52. Hot-Plug Indicator Board Connector Pin Out (J3D1)

Connector contact

Signal Name

Connector contact

Signal Name

1

Vcc

2

GROUND

3

P64_A_SWITCH<0>

4

P64_A_GRN_LED<1>

5

P64_A_AMB_LED<0>

6

P64_A_SWITCH<1>

7

P64_A_GRN_LED<1>

8

P64_A_AMB_LED<1>

9

P64_B_SWITCH<0>

10

P64_A_GRN_LED<0>

11

P64_B_AMB_LED<0>

12

P64_B_SWITCH<1>

13

P64_B_GRN_LED<1>

14

P64_A_AMB_LED<1>

15

P64_B_SWITCH<2>

16

P64_A_GRN_LED<2>

17

P64_A_AMB_LED<2>

18

P64_B_SWITCH<3>

19

P64_A_GRN_LED<3>

20

P64_A_AMB_LED<3>

96

SKA4 Baseboard Product Guide