2-6
Functional Description
2.1.2.5 Reserved Command
The given bus encoding is reserved.
2.1.2.6 Memory Read Command
The LSI53C1000 uses the Memory Read command to read data from an
agent mapped in the Memory Address Space. The target may perform
an anticipatory read if such a read produces no side effects.
2.1.2.7 Memory Write Command
The LSI53C1000 uses the Memory Write command to write data to an
agent mapped in the Memory Address Space. When the target returns
“ready”, it assumes responsibility for data coherency, which includes
ordering.
2.1.2.8 Configuration Read Command
The Configuration Read command reads the configuration space of a
device. The LSI53C1000 never generates this command as a master, but
does respond to it as a slave. A device on the PCI bus selects the
LSI53C1000 by asserting its IDSEL signal when AD[1:0] are 0b00.
During the address phase of a configuration cycle, AD[7:2] address one
of the 64 Dword registers in the configuration space of each device.
C_BE[3:0]/ address the individual bytes within each Dword. AD[10:8]
indicate which device on the LSI53C1000 is being addressed. The
LSI53C1000 treats AD[63:11] as logical don’t cares.
2.1.2.9 Configuration Write Command
The Configuration Write command writes the configuration space of a
device. The LSI53C1000 never generates this command as a master, but
does respond to it as a slave. A device on the PCI bus selects the
LSI53C1000 by asserting its IDSEL signal when AD[1:0] are 0b00.
During the address phase of a configuration cycle, AD[7:2] address one
of the 64 Dword registers in the configuration space of each device.
C_BE[3:0]/ address the individual bytes within each Dword. AD[10:8]
indicate which device on the LSI53C1000 is being addressed. The
LSI53C1000 treats AD[63:11] as logical don’t cares.
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
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Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...