MC68030 Datasheet, PDF (212/602 Pages) Motorola, Inc – ENHANCED 32-BIT MICROPROCESSOR

Bus Operation
S0
S2
S4
S6
CLK
A31–A4
A3
A2–A0
FC2–FC0
SIZ1–SIZ0
R/W
ECS
OCS
3
AS
DS
STERM
CIIN
CIOUT
CBREQ
CBACK
D31–D0
DBEN
b4–b7
b8–bB
VALUE OF CBACK
CONTROL NEXT CYCLE
bC–bF
1
2
01 10
11
VALUE OF A3:A2 INCREMENTED BY THE SYSTEM HARDWARE
NOTES:
1. Assertion of CBACK causes data to be placed on D31–D0.
2. Continued assertion of CBACK causes data to be placed on D31–D0.
3. Negation of CBACK causes AS to be negated.
Figure 7-39. Long-Word Operand Request from $07 with
Burst Request — CBACK Negated Early
7-66
MC68030 USER’S MANUAL
MOTOROLA