IDT70V27 Integrated Device Technology, IDT70V27 Datasheet - Page 16

• Manufacturer Part Number: IDT70V27
• Description: 32k X 16 3.3v Dual-port Ram
• Manufacturer: Integrated Device Technology

Waveform of Interrupt Timing
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.
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.
5. Refer to Chip Enable Truth Table.
Truth Table IV — Interrupt Flag
NOTES:
1. Assumes BUSY
2. If BUSY
3. If BUSY
4. Refer to Chip Enable Truth Table.
ADDR
IDT 70V27S/L
High-Speed 3.3V 32K x 16 Dual-Port Static RAM
ADDR
R/W
R/W
INT
X
X
X
INT
CE
L
OE
CE
L
"A"
"A"
"A"
"B"
"B"
"B"
"B"
"B"
L
R
= V
= V
CE
IL
IL
X
X
L
L
, then no change.
, then no change.
L
L
= BUSY
Left Port
OE
R
X
X
X
L
=V
L
IH
.
t
A
t
AS
AS
14L
7FFF
7FFE
(3)
X
X
(3)
-A
t
t
INS
INR
0L
(3)
(3)
INTERRUPT CLEAR ADDRESS
INTERRUPT SET ADDRESS
INT
H
L
X
X
(3)
(2)
L
(1,5)
R/W
(1,4)
X
X
X
L
t
t
WC
RC
R
16
CE
X
X
L
L
R
(2)
(2)
Right Port
OE
X
L
X
X
t
R
Commercial and Industrial Temperature Range
WR
(4)
A
14R
7FFF
7FFE
X
X
-A
0R
INT
H
L
X
X
(2)
(3)
R
Set Right INT
Reset Right INT
Set Left INT
Reset Left INT
Function
3603 drw 15
L
3603 drw 16
R
Flag
L
Flag
R
Flag
Flag
3603 tbl 16