L67130/L67140
Table 2 : Arbitration
(5)
LEFT PORT
CS
L
H
L
H
L
RIGHT PORT
CS
R
H
H
L
L
FLAGS
FUNCTION
BUSY
L
H
H
H
H
A
0L
– A
9L
X
Any
X
≠
A
0R
– A
9R
A
0L
– A
9R
X
X
Any
≠
A
0L
– A
9L
BUSY
R
H
H
H
H
No Contention
No Contention
No Contention
No Contention
ADDRESS ARBITRATION WITH CE LOW BEFORE ADDRESS MATCH
L
L
L
L
LV5R
RV5L
Same
Same
L
L
L
L
LV5R
RV5L
Same
Same
H
L
H
L
L
H
L
H
L–Port Wins
R–Port Wins
Arbitration Resolved
Arbitration Resolved
CS ARBITRATION WITH ADDRESS MATCH BEFORE CS
LL5R
RL5L
LW5R
LW5R
Notes :
= A
0R
– A
9R
= A
0R
– A
9R
= A
0R –
A
9R
= A
0R
– A
9R
LL5R
RL5L
LW5R
LW5R
= A
0L
– A
9L
= A
0L –
A
9L
= A
0L
– A
9L
= A
0L
– A
9L
H
L
H
L
L
H
L
H
L–Port Wins
R–Port Wins
Arbitration Resolved
Arbitration Resolved
5. INT Flags Don’t Care.
6. X = DON’T CARE, L = LOW, H = HIGH.
LV5R = Left Address Valid
≥
5 ns before right address.
RV5L = Right address Valid
≥
5 ns before left address.
Same = Left and Right Addresses match within 5 ns of each other.
LL5R = Left CS = LOW
≥
5 ns before Right CS.
RL5L = Right CS = LOW
≥
5 ns before left CS.
LW5R = Left and Right CS = LOW within 5 ns of each other.
Table 3 : Interrupt Flag
(7, 10)
LEFT PORT
R/W
L
L
X
X
X
Notes :
7.
8.
9.
10.
RIGHT PORT
FUNCTION
INT
L
X
X
L
(9)
H
(8)
CS
L
L
X
X
L
OE
L
X
X
X
L
A
OL
–A
9L
3FF
X
X
3FE
R/W
R
X
X
L
X
CS
R
X
L
L
X
OE
R
X
L
X
X
A
OR
–A
9R
X
3FF
3FE
X
INT
R
L
(8)
H
(9)
X
X
Set Right INT
R
Flag
Reset Right INT
R
Flag
Set Left INT
L
Flag
Reset Left INT
L
Flag
Assumes BUSY
L
= BUSY
R
= H.
If BUSY
L
= L, then NC.
If BUSY
R
= L, then NC.
H = HIGH, L = LOW, X = DON’T CARE, NC = NO CHANGE.
MATRA MHS
Rev. D (19 Fev. 97)
5
TEMIC [ TEMIC SEMICONDUCTORS ]
