Installing and Replacing Desktop Board Components 
45 
Chassis Intrusion Header 
Figure 19, C shows the location of the chassis intrusion header.  This header can be 
connected to a mechanical switch on the chassis to detect if the chassis cover is 
removed.  This switch should be in the open position when the chassis cover is 
installed and closed when the cover is removed.  
Table 7 shows the pin assignments and
 signal names for the chassis intrusion header. 
Table 7.  Chassis Intrusion Header Signal Names 
Pin Description 
1   Intruder# 
2 Ground 
 
TPM Header 
The TPM header is shown in Figure 19, D.  Table 8 shows the pin assignments and 
signal names for TPM header. 
Table 8.  TPM Header Signal Names  
Pin Signal Name  Pin Signal Name 
1   CK_33M_TPM_DIP  2  Ground 
3 LFRAME#  4 Key (no pin) 
5 PLTRST#  6 No connection 
7 LAD3  8 LAD2 
9 +3.3 V  10 LAD1 
11 LAD0  12 Ground 
13 No connection  14 No connection 
15 +3.3 VSB  16 TPM_SERRQ 
17 Ground  18 TPM_CLKRUN# 
19 LPCPD#  20 No connection