Avago Technologies LSI53C1020 - Manual (Page 38)

2-12 Functional Description
Version 2.4 Copyright © 2001–2004 by LSI Logic Corporation. All rights reserved.
returns “ready.” The LSI53C1020 supports this command when operating
in either the PCI or PCI-X bus mode.
2.3.2.8 Alias to Memory Read Block Command
This command is reserved for future implementations of the PCI
specification. The LSI53C1020 never generates this command as a
master. When a slave, the LSI53C1020 supports this command using the
Memory Read Block command.
2.3.2.9 Alias to Memory Write Block Command
This command is reserved for future implementations of the PCI
specification. The LSI53C1020 never generates this command as a
master. When a slave, the LSI53C1020 supports this command using the
Memory Write Block command.
2.3.2.10 Configuration Read Command
This command reads the configuration space of a device. The
LSI53C1020 never generates this command as a master, but does
respond to it as a slave. A device on the PCI bus selects the LSI53C1020
by asserting its IDSEL signal when AD[1:0] equal 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 register and determine
the type of access to perform. Bits AD[10:8] address the PCI Function
Configuration Space (AD[10:8] = 0b000). The LSI53C1020 treats
AD[63:11] as logical don’t cares.
2.3.2.11 Configuration Write Command
This command writes the configuration space of a device. The
LSI53C1020 never generates this command as a master, but does
respond to it as a slave. A device on the PCI bus selects the LSI53C1020
by asserting its IDSEL signal when bits AD[1:0] equal 0b00. During the
address phase of a configuration cycle, bits 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 register and determine
the type of access to perform. Bits AD[10:8] decode the PCI Function
Configuration Space (AD[10:8] = 0b000). The LSI53C1020 treats
AD[63:11] as logical don’t cares.