The 60x Bus
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 8-11
NOTE
Regarding Tabl e 8-2:
1XX01 Reserved
for
customer
Not applicable Not applicable Not applicable Illegal
00010 WR w/flush Single-beat
write or
Burst
Single-beat
write
CI, WT store, or
non-processor master
under
Flush, cancel
reservation
Write, assert AACK
and TA.
00110 WR w/Kill Burst Burst
(non-GLB)
Castout, ca-op push,
or snoop copyback
Kill, cancel
reservation
Write, assert AACK
and TA.
01010 Read Single-beat
read or burst
Single-beat
read
CI load, CI I-fetch or
nonprocessor master
Clean or flush Read, assert AACK
and TA.
01110 Read with
intent to
modify
Burst Burst Load miss, store
miss, or I-fetch
Flush Read, assert AACK
and TA.
10010 WR w/flush
atomic
Single-beat
write
Single-beat
write
stwcx Flush, cancel
reservation
Write, assert AACK
and TA
10110 Reserved Not
applicable
Not applicable Not applicable Not applicable Illegal
11010 Read
atomic
Single-beat
read or burst
Single-beat
read
lwarx (CI load) Clean or flush Read, assert AACK
and TA
11110 Read with
intent to
modify
atomic
Burst Burst lwarx (load miss) Flush Read, assert AACK
and TA
00011 Reserved Not applicable Not applicable Not applicable Illegal
00111 Reserved Not applicable Not applicable Not applicable Illegal
01011 Read with
no intent to
cache
Single-beat
read or burst
Not applicable Not applicable Clean Read, assert AACK
and TA
01111 Reserved Not applicable Not applicable Not applicable Illegal
1XX11 Reserved
for
customer
Not applicable Not applicable Not applicable Illegal
1TT1 can be interpreted as a read-versus-write indicator for the bus.
2This column specifies the TT encoding for the general 60x protocol. The processor generates or snoops only a subset
of those encodings.

Table8-2. Transfer Type Encoding (continued)

TT[0–4]1
60x Bus Specification2PowerQUICCII as Bus Master PowerQUICCI
I as Snooper
PowerQUICCII
as Slave
Command Transaction Bus Trans. Transaction Source Action on Hit Action on Slave Hit