Intel BOXDP67BA Product Specification - Page 49

Front Panel USB 2.0 Headers, 2.2.7, Low Pin Count LPC Debug Header

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Technical Reference 2.2.2.6 Front Panel USB 2.0 Headers Figure 12 is a connection diagram for the front panel USB 2.0 headers. NOTE • The +5 V DC power on the USB headers is fused. • Use only a front panel USB connector that conforms to the USB 2.0 specification for high-speed USB devices. Figure 12. Connection Diagram for Front Panel USB 2.0 Headers 2.2.2.7 Low Pin Count (LPC) Debug Header During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred. Displaying the POST codes requires a POST card that can interface with the Low Pin Count (LPC) Debug header. The POST card can decode the port and display the contents on a medium such as a seven-segment display. Table 27. LPC Debug Header Pin Signal Name 1 CK_33M_DEBUG 3 PLTRST# 5 LAD0 7 LAD2 9 GND 11 +3.3 V 13 Not Connected Pin Signal Name 2 GND 4 LFRAME# 6 LAD1 8 LAD3 10 GND 12 +3.3 V 14 +3.3 V 49

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Technical Reference
49
2.2.2.6
Front Panel USB 2.0 Headers
Figure 12 is a connection diagram for the front panel USB 2.0 headers.
NOTE
•
The +5 V DC power on the USB headers is fused.
•
Use only a front panel USB connector that conforms to the USB 2.0 specification
for high-speed USB devices.
Figure 12.
Connection Diagram for Front Panel USB 2.0 Headers
2.2.2.7
Low Pin Count (LPC) Debug Header
During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O
port 80h.
If the POST fails, execution stops and the last POST code generated is left
at port 80h.
This code is useful for determining the point where an error occurred.
Displaying the POST codes requires a POST card that can interface with the Low Pin
Count (LPC) Debug header.
The POST card can decode the port and display the
contents on a medium such as a seven-segment display.
Table 27.
LPC Debug Header
Pin
Signal Name
Pin
Signal Name
1
CK_33M_DEBUG
2
GND
3
PLTRST#
4
LFRAME#
5
LAD0
6
LAD1
7
LAD2
8
LAD3
9
GND
10
GND
11
+3.3 V
12
+3.3 V
13
Not Connected
14
+3.3 V