IDT7007S/L
High-Speed 32K x 8 Dual-Port Static RAM
Waveform of Interrupt Timing (1)
t WC
Military, Industrial and Commercial Temperature Ranges
ADDR "A"
INTERRUPT SET ADDRESS
(2)
t AS (3)
t WR
(4)
CE "A"
R/ W "A"
t INS (3)
INT "B"
2940 drw 17
t RC
ADDR "B"
INTERRUPT CLEAR ADDRESS
(2)
t AS (3)
CE "B"
OE "B"
t INR (3)
INT "B"
2940 drw 18
NOTES:
1. All timing is the same for left and right ports. Port “A” may be either the left or right port. Port “B” is the port opposite from port “A”.
2. See Interrupt Truth Table III.
3. Timing depends on which enable signal ( CE or R/ W ) is asserted last.
4. Timing depends on which enable signal ( CE or R/ W ) is de-asserted first.
Truth Table III — Interrupt Flag (1)
Left Port
Right Port
L
H
L
H
R/ W L
L
X
X
X
CE L
L
X
X
L
OE L
X
X
X
L
A 14L -A 0L
7FFF
X
X
7FFE
INT L
X
X
(3)
(2)
R/ W R
X
X
L
X
CE R
X
L
L
X
OE R
X
L
X
X
A 14R -A 0R
X
7FFF
7FFE
X
INT R
(2)
(3)
X
X
Function
Set Right INT R Flag
Reset Right INT R Flag
Set Left INT L Flag
Reset Left INT L Flag
2940 tbl 16
NOTES:
1. Assumes BUSY L = BUSY R =V IH .
2. If BUSY L = V IL , then no change.
3. If BUSY R = V IL , then no change.
16
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