Motorola MVME2300 Series - Manual (Page 85)

Functional Description
http://www.motorola.com/computer/literature 2-15
2
Command Types
Table 2-4 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