IDT7140LA55CB datasheet(10/14 Pages) IDT

10 / 14 page

IDT7130SA/LA AND IDT7140SA/LA

HIGH-SPEED 1K x 8 DUAL-PORT STATIC RAM WITH INTERRUPTS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

6.01

TIMING WAVEFORM OF WRITE WITH

BUSY

BUSY(3)

BUSY'B'

2689 drw 13

W'A'

tWP

tWH

tWB

W'B'

(2)

(1)

NOTES:

1. tWH must be met for both BUSY Input (IDT7140, slave) or Output (IDT7130 master).

2. BUSY is asserted on port 'B' blocking R/W'B', until BUSY'B' goes High.

3. All timing is the same for the left and right ports. Port 'A' may be either the left or right

port. Port "B" is opposite from port "A".

TIMING WAVEFORM OF BUSY ARBITRATION CONTROLLED BY

CE TIMING (1)

TIMING WAVEFORM OF BUSY ARBITRATION CONTROLLED BY ADDRESS MATCH TIMING (1)

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. If tAPS is not satisified, the

BUSY will be asserted on one side or the other, but there is no guarantee on which side BUSY will be

asserted (7130 only).

tAPS

ADDR

'A'

AND 'B'

ADDRESSES MATCH

tBAC

tBDC

CE'B'

CE'A'

BUSY'A'

2689 drw 14

(2)

BUSY'B'

ADDRESSES DO NOT MATCH

ADDRESSES MATCH

tAPS

ADDR'A'

ADDR'B'

2689 drw 15

(2)

tBAA

tBDA

tRC OR tWC

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