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3- 32 M68040 USER'S MANUAL MOTOROLA
ENTRY
EXIT
OTHERWISE
TAKE ACCESS ERROR 
EXCEPTION
ABORT CYCLE
ATC HIT
OTHERWISE
ABORT CYCLE
TABLE SEARCH
OPERATION
TAKE ACCESS ERROR 
EXCEPTION
EXIT
OTHERWISE
PA ATC ENTRY [PA]
UPA ATC ENTRY [U1,U0]
CM ATC ENTRY [CM]
PA LOGICAL ADDRESS
UPA TTR1* [U1,U0]
CM TTR1* [CM]
EXIT
PA LOGICAL ADDRESS
UPA TTR0* [U1,U0]
CM TTR0* [CM]
ABORT CYCLE
(TTR1*[W] = 1) AND
(WRITE OR RMW 
ACCESS)
(TTR0*[W] = 1) AND
(WRITE OR RMW 
ACCESS)
LOGICAL ADDRESS
MATCHES WITH TTR0*
OTHERWISE
ATC MISS
(R = 0) OR
[(W = 1) AND
(WRITE OR RMW CYCLE)]
LOGICAL ADDRESS
MATCHES WITH 
TTRx*
OTHERWISE
OTHERWISE
(M = 0) AND
(WRITE OR RMW CYCLE)
* Refers to either instruction or data transparent translation register.
Figure 3-22. Address Translation Flowchart
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