7- 14 M68040 USER’S MANUAL MOTOROLA
UNTIL FOUR LONG WORDS
TRANSFERRED
1) NEGATE TIP (IF REQUIRED)
WHEN FOUR LONG WORDS
TRANSFERRED
ADDRESS DEVICE
END OF BURST
START NEXT 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
PROCESSOR EXTERNAL DEVICE
PRESENT DATA
TERMINATE CYCLE
1) DECODE ADDRESS
2) PLACE DATA ON D31–D0
3) ASSERT TA
1) REMOVE DATA FROM D31–D0
2) NEGATE TA (IF NECESSARY)
3) INCREMENT ADDRESS BITS A3, A2 (IF NECESSARY)
1) LATCH DATA
2) SAMPLE TBI AND TCI (FOR FIRST TRANSFER)
ACQUIRE DATA
Figure 7-10. Line Read Transfer Flowchart
