LSI 53C875A User Manual
2-4
Functional Description
2.1.2.1 Interrupt Acknowledge Command
The LSI53C875A does not respond to this command as a slave and it
never generates this command as a master.
never generates this command as a master.
2.1.2.2 Special Cycle Command
The LSI53C875A does not respond to this command as a slave and it
never generates this command as a master.
never generates this command as a master.
Table 2.1
PCI Bus Commands and Encoding Types for the LSI53C875A
C_BE[3:0]/
Command Type
Supported as Master
Supported as Slave
0b0000
Interrupt Acknowledge
No
No
0b0001
Special Cycle
No
No
0b0010
I/O Read
Yes
Yes
0b0011
I/O Write
Yes
Yes
0b0100
Reserved
n/a
n/a
0b0101
Reserved
n/a
n/a
0b0110
Memory Read
Yes
Yes
0b0111
Memory Write
Yes
Yes
0b1000
Reserved
n/a
n/a
0b1001
Reserved
n/a
n/a
0b1010
Configuration Read
No
Yes
0b1011
Configuration Write
No
Yes
0b1100
Memory Read Multiple
Yes
1
1. See the
register.
Yes (defaults to 0b0110)
0b1101
Dual Address Cycle (DAC)
Yes
No
0b1110
Memory Read Line
Yes
1
Yes (defaults to 0b0110)
0b1111
Memory Write and Invalidate
Yes
2
2. See the
register.
Yes (defaults to 0b0111)