
Maps and Registers
104
ATCA-7540 Installation and Use (6806871A01A
)
The BIOS uses these configuration addresses to initialize the logical devices at POST. The INDEX
and DATA addresses are only valid when the Super IO is in Configuration State. The INDEX and
DATA addresses are effective only when the Super IO is in the Configuration State. When the
Super IO is not in the Configuration State, reads return 0xFF and write data is ignored.
5.1.3.1
Entering the Configuration State
The device enters the Configuration State by the following contiguous sequence:
1. Write 80H to Configuration Index Port
2. Write 86H to Configuration Index Port
5.1.3.2
Existing the Configuration State
The device exits the Configuration State by the following contiguous sequence:
1. Write 68H to Configuration Index Port
2. Write 08H to Configuration Index Port
5.1.3.3
Configuration Mode
The system sets the logical device information and activates desired logical devices through
the INDEX and DATA ports.
The desired configuration registers are accessed in two steps:
1. Write the index of the Logical Device Number Configuration Register (i.e., 07) to the
INDEX PORT and then write the number of the desired logical device to the DATA
PORT.
Table 5-6.
Super IO Configuration Index Register
LPC I/O Address: 0x4E
Bit
Description
Default
Access
7:0
INDEX. Configuration Index.
0xFF
LPC: r/w
Table 5-7.
Super IO Configuration Data Register
LPC I/O Address: 0x4F
Bit
Description
Default
Access
7:0
DATA. Configuration Data.
0xFF
LPC: r/w
Содержание ATCA-7540
Страница 1: ...ATCA 7540 Installation and Use P N 6806871A01A December 2018 ...
Страница 12: ...12 ATCA 7540 Installation and Use 6806871A01A Contents ...
Страница 28: ...About this Manual 28 ATCA 7540 Installation and Use 6806871A01A ...
Страница 34: ...Safety Notes 34 ATCA 7540 Installation and Use 6806871A01A ...
Страница 66: ...Hardware Preparation and Installation 66 ATCA 7540 Installation and Use 6806871A01A ...
Страница 276: ...Supported IPMI Commands 276 ATCA 7540 Installation and Use 6806871A01A ...
Страница 322: ...Related Documentation 322 ATCA 7540 Installation and Use 6806871A01A ...
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