NAT-MCH Hub Module PCIe – Technical Reference Manual
Table 13:
HP_PRSNT2 - Register Bits
Bit
Name
Function
[3..0] HP_PRSNT
(12:9)
These bits have to be cleared by the CPU on the Base
Module if an AMC is recognized on the corresponding
AMC slot. These bits have to be set if the corresponding
AMC slot is empty.
HP_PRSNT9 is assigned to AMC9 and HP_PRSNT12 to
AMC12
[7..4] -
no function
write as 0 and ignore when read
10.3.7 Hot Plug Button 1 Register
The Hot Plug Button 1 Register controls together with the The Hot Plug Button 2 Register
controls together with the Hot Plug Button 1 Register the value of the /HP_BUTTON balls of
the corresponding PEX8532.
HP_BUTTON2 Register the value of the /HP_BUTTON balls of the corresponding PEX8532.
Table 14:
HP_BUTTON1 Register
Hot Plug Button 1 – Address 0x14
Default value 0xff
Bit
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Func HP_BUTTON[8:1]
Table 15:
HP_BUTTON1 - Register Bits
Bit
Name
Function
[7..0] HP_BUTTON
(8:1)
These bits have to be cleared and set again, if an AMC’s
HP handle was attended.
HP_ BUTTON 1 is assigned to AMC1 and HP_
BUTTON 8 to AMC8
Version 2.0
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