Technical Product Specification

Technical Reference

Table 19. Chassis Intrusion Header

Pin Signal Name

1 Intruder#

2 Ground

Table 20. Processor, Front, and Rear Chassis

(4-Pin) Fan Headers

Signal Name

1 Ground

(Note)

2 +12 V

3 FAN_TACH

4 FAN_CONTROL

Note: These fan headers use Pulse Width Modulation control for fan speed.

Table 21. LPC Debug Header

Pin Signal Name Pin Signal Name

1 CK_33M_DEBUG 2 GND

3 PLTRST# 4 LFRAME#

LAD0

LAD1

7 LAD2 8 LAD3

9 GND 10 GND

11 +3.3 V 12 +3.3 V

Key (no pin)

+3.3 V

2.2.2.2 Add-in Card Connectors

The board has the following add-in card connectors:

• One PCI Express x16 (3.0/2.x/1.x)

• One PCI Express x1 (2.x/1.x)

• Two Conventional PCI (rev 2.3)

Note the following considerations for the Conventional PCI bus connectors:

• The Conventional PCI bus connectors are bus master capable.

• SMBus signals are routed to the Conventional PCI bus connectors. This enables

Conventional PCI bus add-in boards with SMBus support to access sensor data on

the desktop board. The specific SMBus signals are as follows:

 The SMBus clock line is connected to pin A40.

 The SMBus data line is connected to pin A41.