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IDT70125S55J Datasheet(PDF) 10 Page - Integrated Device Technology

Part # IDT70125S55J
Description  HIGH-SPEED 2K x 9 DUAL-PORT STATIC RAM WITH BUSY & INTERRUPT
Download  12 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT70125S55J Datasheet(HTML) 10 Page - Integrated Device Technology

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6.10
10
IDT 70121/70125S/L
HIGH-SPEED 2K x 9 DUAL-PORT STATIC RAM WITH BUSY & INTERRUPT
COMMERCIAL TEMPERATURE RANGE
tINS
ADDR'A'
INT'B'
INTERRUPT SET ADDRESS
tWC
tAS
R/
W'A'
tWR
2654 drw 14
(2)
(3)
(3)
(4)
NOTES:.
1.
All timing is the same for left and right ports. Port 'A' may be either left or right port. Port 'B' is the opposite from port 'A'.
2. See Interupt 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.
TIMING WAVEFORM OF INTERRUPT MODE
TRUTH TABLES
TRUTH TABLE II – INTERRUPT FLAG(1,4)
Left Port
Right Port
R/
W
W
W
W
WL
CE
CE
CE
CE
CEL
OE
OE
OE
OE
OEL
A0L – A10L
INT
INT
INT
INT
INTL
R/
W
W
W
W
WR
CE
CE
CE
CE
CER
OE
OE
OE
OE
OER A0L – A10R INT
INT
INT
INT
INTR
Function
L
L
X
7FF
XXXX
X
L
(2)
Set Right
INTR Flag
X
X
X
X
X
X
L
L
7FF
H
(3)
Reset Right
INTR Flag
XXX
X
L
(3)
L
L
X
7FE
X
Set Left
INTL Flag
X
L
L
7FE
H
(2)
X
X
X
X
X
Reset Left
INTL Flag
NOTES:
2654 tbl 13
1. Assumes
BUSYL = BUSYR = VIH
2. If
BUSYL = VIL, then No Change.
3. If
BUSYR = VIL, then No Change.
4. 'H' = VIH,' L' = VIL,' X' = DON’T CARE.
TRUTH TABLE I –
NON-CONTENTION READ/WRITE CONTROL(4)
Left or Right Port(1)
R/
W
W
W
W
W CE
CE
CE
CE
CE
OE
OE
OE
OE
OE
D0–8
Function
X
H
X
Z
Port Disabled and in Power-
Down Mode, ISB2 or ISB4
XH
X
Z
CER = CEL = H, Power-Down
Mode, ISB1 or ISB3
L
L
X
DATAIN
Data on Port Written Into Memory
(2)
H
L
L
DATAOUT Data in Memory Output on Port
(3)
H
L
H
Z
High-impedance Outputs
NOTES:
2654 tbl 12
1. A0L – A10L
≠ A0R – A10R.
2. If
BUSY = VIL, data is not written.
3. If
BUSY = VIL, data may not be valid, see tWDD and tDDD timing.
4. 'H' = VIH, 'L' = VIL, 'X' = DON’T CARE, 'Z' = High-impedance.


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