Motorola MC68030 - Page 212

Bus Operation
7-66 MC68030 USER’S MANUAL MOTOROLA
Figure 7-39. Long-Word Operand Request from $07 with
Burst Request — CBACK
Negated Early
CLK
A31–A4
A3
A2–A0
FC2–FC0
SIZ1–SIZ0
R/W
S0 S2 S4 S6
ECS
OCS
AS
DS
b4–b7
b8–bB
bC–bF
01 10 11
1
2
VALUE OF CBACK
CONTROL NEXT CYCLE
3
STERM
CIIN
CIOUT
CBREQ
CBACK
D31–D0
DBEN
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.