Processor Timing - NEC Advanced Personal Computer System Reference Manual

Processor PCB
PHIO
ADS TO AD15
BHE lAO TO A7
MRQ
MRD/IORIIOW
ADS TO AD15
MW
ALE
DMC
T1 T2 T3 T4
_ 1 1
~
I
1_ 1 30 ns IOns
~
lIOns, - - ,10nsMIN ... __
'''.1
==x
AS TO A15 ) ...
-----~(rDO:A~TrAA~INN».-----
--~~~------------V-AL-ID----------------~
~35ns~
-1
10ns
~r---
\_--------------~/
\\----------,
10 ns
I
!~
I
I
~ ~
---x
AS TO A15 Xr----D-A-T-A-O-U-T-------X
~ ~35ns
H
--~l--_-_--_--_-_--_~\.~
________
~,~-------
l::jS5 ns
\
NOTE: WITH MEMORY IN REFRESH, MW
BECOMES ACTIVE BEFORE MRQ.
\...1330 ns MIN
-l
2~OA~
I--
~~~
__ 1 _________________________
I~c=
Figure 2-4 Processor Timing
2-8