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DRAM PLD DESCRIPTIONS
refresh
address
counter
pal
intel
corporation
Equations
for
Module
refaddr
Device
U3S
-
Reduced
Equations:
RAO
:"
!CRAO);
RA1
:,
!CRAO &
RA1
# !RAO &
!RA1);
RA2
:"
!(RAO
RA1
&
RA2
, !RAO &
!RA2
I !RA1 &
!RA2);
RA3
: '
! ( R A 0
&
R A 1 &
RA2
RA3
,
!RAO
&
!RA3
,
! R A 1
& ! R A 3
I
! R A 2
&
!RA3);
RA4
: '
! ( R A 0 &
R A 1 &
RA2
&
RA3
&
R A 4
,
! R A 0 &
! R A 4
,
! R A 1 &
! R A 4
,
! R A 2 &
! R A 4
,
! R A 3 &
! R A
4)
;
RAS
: .
! ( R A 0
&
R A 1 &
RA2
&
R A 3 &
R A 4 &
R A 5
,
! R A 0
! R A 5
,
!
RA
1
& !RAS
!RA2
!RAS
! R A 3
! R A 5
,
!RA4
&
! R AS) ;
RAG
: .
!(RAO
& R A 1
& R A 2
&
RA3
& R A 4
& R A 5 &
RAG
,
!RAO
&
!RAG
,
! R A 1
& !
RAG
,
!RA2
& !
RAG
I
! R A 3
!
RAG
,
!RA4
!RAG
,
! R A 5
! RAG) ;
RA7
: '
!C
R A 0 &
R A 1 &
RA2
&
RA3
&
RA4
&
RAS
&
RAG
&
R A 7
,
! R A 0
! R A 7
! R A 1
! R A 7
! R A 2
!RA7
,
!RA3
! R A 7
!RA4
!RA7
!RAS
!RA7
,
!RAG
! R A
7>
;
RAe
: .
! ( R A 0
&
R A 1 &
RA2
&
RA3
&
RA4
&
RAS
&
RAG
&
RA7
&
,
!RAO
!RAe
! R A 1
!
RAe
! R A 2
!
RAe
!RA3
!
RAe
! R A 4
!
RAe
I
! R A 5
!
RAe
I
!
RAG
!
RAe
,
!RA7
! RAe) ;
Figure 8-4. Refresh Address Counter
PLD
Equations (Contd.)
8-15
RAe