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22.3.2
PCI Commands
Table 22.9 lists the PCI commands and shows the PCIC support.
Table 22.9 PCI Command Support
Command
Memory read
Memory read line
Memory read multiple
Memory write
Memory write and invalidate
I/O read
I/O write
Configuration read
Configuration write
Interrupt acknowledge cycle
Special cycle
Dual address cycle
Notes: O: Supported
: Limited support
X, —: Not issued by PCIC or no response from PCIC
When PCIC Operates as Master: The PCIC supports the memory read command, memory write
command, I/O read command, and I/O write command. When the host functions are enabled, the
configuration command and special cycle can also be used.
When PCIC Operates as Target: The PCIC receives the memory read command, memory write
command, I/O read command, and I/O write command. The memory read line command and
memory read multiple command function as memory reads, while the memory write invalidate
command functions as a memory write. When operating in non-host mode, the PCIC accepts the
configuration command.
Rev. 3.0, 04/02, page 880 of 1064
Host Operation
Master Target
O
O
X
X
O
O
X
O
O
O
O
O
—
O
—
X
X
O
—
X
X
Non-Host
Operation
Master Target
Remarks
O
O
X
When the target, operates
as memory read
X
When the target, operates
as memory read
O
O
X
When the target, operates
as memory write
O
O
O
O
—
O
—
O
X
X
—
X
X
X
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