Motorola MC68030 - Page 228

Bus Operation
7-82 MC68030 USER’S MANUAL MOTOROLA
For STERM, the bus cycle terminations are summarized as follows (case numbers refer to
Table 7-9):
Normal Termination:
STERM
is asserted; BERR and HALT remain negated (case 1).
Halt Termination:
HALT
is asserted before STERM, and BERR remains negated (case 2).
Bus Error Termination:
BERR
is asserted in lieu of, at the same time, or before STERM (case 3) or after
STERM
(case 4), and HALT remains negated; BERR is negated at the same time or
after STERM
.
Retry Termination:
HALT
and BERR are asserted in lieu of, at the same time, or before STERM (case 5)
or after STERM
(case 6); BERR is negated at the same time or after STERM; HALT
may be negated at the same time or after BERR.