A.C. ELECTRICAL CHARACTERISTICS (continued)

Signal

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

CS1, CS2

Low level setup time

to WR falling edge

Low Level hold time

from WR rising edge

High Level setup time

to WR falling edge

High level hold time

from WR rising edge

Low level setup time

to RD falling edge

Low level hold time

from RD rising edge

High level setup time

RD falling edge

High level hold time

from RD

Active Case

Active Case

Inactive Case

Inactive Case

Active Case

Active Case

Inactive Case

Inactive Case

0

0

0

0

0

0

0

0

ns

ns

ns

ns

ns

ns

ns

ns

C/D

Setup time to write

strobe end

Hold time from

write strobe end

Setup time to read

strobe start

Hold time from read

strobe end

130

15

20

20

ns

ns

ns

ns

A1, S1,

A2, S2

(match

inputs)

Setup time to write

strobe end

Hold time from

strobe end

Setup time to read

strobe start

Hold time from read

strobe end

130

15

20

20

ns

ns

ns

ns

DR

(data

ready)

Low state width

DR output delay

from write strobe end

(active command)

Instructions 5 and 6

150pF

ns

ns

D0 to D7

(interface

bus)

Input setup time to

write strobe end

Input hold time

from write strobe end

Propagation time

from (active) falling

Edge of read strobe

Propagation time

from (active) rising

Edge of read strobe

to high impedance state

130

15

120

80

ns

ns

ns

ns

A.C. TESTING, OUTPUT WAVEFORM

A.C. testing inputs are driven at 2.4V for a logic ”1” and 0.45V for a logic ”0”, timing measurement are made at

2.0V for a logic ”1”and 0.8V for a logic ”0”.

M3488

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