6.42

7133SA/LA, 7143SA/LA

High-Speed 2K x 16 Dual-Port RAM

Military, Industrial and Commercial Temperature Ranges

16

Jun.16.21

Truth Table I – Non-Contention Read/Write Control(4)

Truth Table II — Address BUSY

Arbitration

NOTES:

1. Pins BUSYL and BUSYR are both outputs on the IDT7133 (MASTER). Both are

inputs on the IDT7143 (SLAVE). On Slaves the BUSY input internally inhibits

writes.

2. "L" if the inputs to the opposite port were stable prior to the address and enable

inputs of this port. “H” if the inputs to the opposite port became stable after the

address and enable inputs of this port. If tAPS is not met, either BUSYL or BUSYR

= VIL will result BUSYL and BUSYR outputs can not be LOW simultaneously.

3. Writes to the left port are internally ignored when BUSYL outputs are driving LOW

regardless of actual logic level on the pin. Writes to the right port are internally

ignored when BUSYR outputs are driving LOW regardless of actual logic level on

the pin.

NOTES:

1. A0L - A10L

≠A0R - A10R

2. If BUSY = LOW, data is not written.

3. If BUSY = LOW, data may not be valid, see tWDD and tDDD timing.

4. "H" = HIGH, "L" = LOW, "X" = Don’t Care, "Z" = High-Impedance, "LB" = Lower Byte, "UB" = Upper Byte

LEFT OR RIGHT PORT(1)

Function

R/WLB

R/WUB

CE

OE

I/O0-7

I/O8-15

X

X

H

X

Z

Z

Port Disabled and in Power Down Mode, ISB2, ISB4

XX

H

X

Z

Z

CER = CEL = VIH, Power Down Mode, ISB1 or ISB3

LLL

X

DATAIN

DATAIN

Data on Lower Byte and Upper Byte Written into Memory(2)

LH

L

L

DATAIN

DATAOUT

Data on Lower Byte Written into Memory(2), Data in Memory Output on

Upper Byte(3)

H

LLL

DATAOUT

DATAIN

Data in Memory Output on Lower Byte(3), Data on Upper Byte Written into

Memory(2)

LH

LH

DATAIN

Z

Data on Lower Byte Written into Memory(2)

HL

L

H

Z

DATAIN

Data on Upper Byte Written into Memory(2)

HH

L

L

DATAOUT

DATAOUT

Data in Memory Output on Lower Byte and Upper Byte

H

H

L

H

Z

Z

High Impedance Outputs

2746 tbl 13

Inputs

Outputs

Function

CEL

CER

A0L-A10L

A0R-A10R

BUSYL(1)

BUSYR(1)

X

X

NO MATCH

H

H

Normal

H

X

MATCH

H

H

Normal

X

H

MATCH

H

H

Normal

L

L

MATCH

(2)

(2)

Write Inhibit(3)

2746 tbl 14