Filter
Top Products
intJ
80386
5.4.6 Shutdown Indication Cycle
the only signals distinguishing shutdown indication
from
halt indication. which drives an address of
2.
During the shutdown cycle undefined data
is
driven
on
00-031.
The shutdown indication cycle must
be
acknowledged
by
READY # asserted.
The 80386 shuts down as a
result of a protection
fault while attempting to process a double fault.
Sig-
naling its entrance into the shutdown state. a shut-
down indication cycle
is
performed. The shutdown
indication
cycle
is
identified
by
the state of the bus
definition
signals shown
in
5.2.5 Bus Cycle Defini-
tion
and a byte address of
O.
BEO# and BE2# are
A shutdown 80386 resumes execution when
NMI
or
RESET
is
asserted.
ClK2[
(82384
ClK)
[
BEl #. BE2#. BE3#. [
M/IO#.
W/R#
BEO#.
A2-A31.
[
O/C#
ADS#[
NA#[
READY#
[
lOCK#[
00-031
[
CYCLE
1
PIPELINED
(READ)
T1
P
T2P
CYCLE
2
PIPELINED
(SHUTDOWN)
T1
P
T21
I
IDLE
Ti
Ti Ti
Ti
~---+.,....-+---r,.~~ir-7'I:~d~~~
80386
REMAINS
SHUTDOWN
'Clt/.::.J.~ID.~~t/.::.J.~*-
UNTil
NMI
OR
RESET
-
IS
ASSERTED
•
•
/'V'I:'?~~~~
I
~~~~~-~--~~~~~~~~~80386RESPONOSTO
~-+---l---!---+
HOLD
INPUT
WHilE
IN
THE
SHUTDOWN
STATE.
231630-28
Figure 5-24. Shutdown Indication Cycle
88