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7- 18 M68040 USER’S MANUAL MOTOROLA
PRESENT DATA
1) LATCH DATA
2) SAMPLE TBI AND TCI
3) RECOGNIZE TBI ASSERTED
1) REMOVE DATA FROM D31–D0
2) NEGATE TA
TERMINATE CYCLE
1) SET R/W TO READ
2) DRIVE ADDRESS ON A31–A0
3) DRIVE USER PAGE ATTRIBUTES ON UPA1, UPA0
4) DRIVE SIZE ON SIZ1, SIZ0 (LINE)
5) DRIVE TRANSFER TYPE ON TT1, TT0
6) DRIVE TRANSFER MODIFIER ON TM2–TM0
7) CIOUT BECOMES VALID
8) ASSERT TS FOR ONE CLOCK
9) ASSERT TIP
ADDRESS DEVICE
ACQUIRE DATA
START NEXT CYCLE
PROCESSOR EXTERNAL DEVICE
1) DECODE ADDRESS
2) PLACE DATA ON D31–D0
3) ASSERT TA AND TBI
1) NEGATE TIP (IF REQUIRED)
END OF LINE TRANSFER
1) INCREMENT ADDRESS BITS A3, A2 AND DRIVE
NEW ADDRESS ON A31–A0
2) DRIVE SIZE ON SIZ1, SIZ0 (LONG WORD)
3) ASSERT TRANSFER START (TS) FOR ONE CLOCK
ADDRESS DEVICE
PRESENT DATA
1) REMOVE DATA FROM D31–D0
2) NEGATE TA
TERMINATE CYCLE
1) DECODE ADDRESS
2) PLACE DATA ON D31–D0
3) ASSERT TA
1) LATCH DATA
ACQUIRE DATA
WHEN THREE LONG WORDS
TRANSFERRED
UNTIL THREE LONG WORDS 
TRANSFERRED
Figure 7-12. Burst-Inhibited Line Read Transfer Flowchart
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