Table 2-4. command types — pci slave response -15 – Motorola MVME2300 Series User Manual
Page 85
Functional Description
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2-15
2
Command Types
shows which types of PCI cycles the slave has been designed to
accept.
Addressing
The slave will accept any combination of byte enables during read or write
cycles. During write cycles, a discontinuity (i.e., a ‘hole’) in the byte
enables will force the slave to issue a disconnect. During all read cycles,
the slave will return an entire word of data regardless of the byte enables.
During I/O read cycles, the slave will perform integrity checking of the
byte enables against the address being presented and assert SERR
∗
in the
event there is an error.
Table 2-4. Command Types — PCI Slave Response
Command Type
Slave Response?
Interrupt Acknowledge
No
Special Cycle
No
I/O Read
Yes
I/O Write
Yes
Reserved
No
Reserved
No
Memory Read
Yes
Memory Write
Yes
Reserved
No
Reserved
No
Configuration Read
Yes
Configuration Write
Yes
Memory Read Multiple
Yes
Dual Address Cycle
No
Memory Read Line
Yes
Memory Write and Invalidate
Yes