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M67025E Datasheet(PDF) 9 Page - ATMEL Corporation

Part # M67025E
Description  Rad. Tolerant High Speed 8 Kb x 16 Dual Port RAM
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

M67025E Datasheet(HTML) 9 Page - ATMEL Corporation

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9
4146N–AERO–04/07
M67025E
Notes:
1. Assumes BUSYL = BUSYR = H.
2. If BUSYL = L, then NC.
3. If BUSYR = L, then NC.
4. H = HIGH, L = LOW, X = DON’T CARE, NC = NO CHANGE.
Notes:
1. INT Flags Don’t Care.
2. 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(1) (4)
Left Port
Right Port
Function
R/WL
CSL
OEL
AOL-A12L
INTL
R/WR
CSR
OER
AOR-A12R
INTR
L
L
X
1FFF
X
X
X
X
X
L(2)
Set Right INTR Flag
X
X
X
X
X
X
L
L
1FFF
H(3)
Reset Right INTR Flag
X
X
X
X
L(3)
L
L
X
1FFE
X
Set Left INTL Flag
X
L
L
1FFE
H(2)
X
X
X
X
X
Reset Left INTL Flag
Table 4. Arbitration(2)
Left Port
Right Port
Flags (1)
Function
CSL
A0L – A12L
CSR
A0R – A12R
BUSYL
BUSYR
H
X
H
X
H
H
No Contention
L
Any
H
X
H
H
No Contention
H
X
L
Any
H
H
No Contention
L
A0R – A12R
L
A0L – A12L
H
H
No Contention
Address Arbitration With CS Low Before Address Match
L
LV5R
L
LV5R
H
L
L-Port Wins
L
RV5L
L
RV5L
L
H
R-Port Wins
L
Same
L
Same
H
L
Arbitration Resolved
L
Same
L
Same
L
H
Arbitration Resolved
CS Arbitration With Address Match Before CS
LL5R
= A0R – A12R
LL5R
= A0L – A12L
H
L
L-Port Wins
RL5L
= A0R – A12R
RL5L
= A0L – A12L
L
H
R-Port Wins
LW5R
= A0R – A12R
LW5R
= A0L – A12L
H
L
Arbitration Resolved
LW5R
= A0R – A12R
LW5R
= A0L – A12L
L
H
Arbitration Resolved


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