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April 21, 2004

U634H256

the end of the low pulse, however the STORE or RECALL will still be initiated.

v: W must be HIGH when E is LOW during the address sequence in order to initiate a nonvolatile cycle. G may be either HIGH or LOW

throughout. Addresses 1 through 6 are found in the mode selection table. Address 6 determines whether the U634H256 performs a STORE

or RECALL.

w: E must be used to clock in the address sequence for the software controlled STORE and RECALL cycles.

Ai

E

DQi

Output

ADDRESS 1

ADDRESS 6

(29)

(29)

(35)

(34)

Ai

E

DQi

Output

ADDRESS 1

VALID

VALID

ADDRESS 6

(32)

(29)

(34)

(33)

(34)

(33)

(5)

High Impedance

High Impedance

(32)

VALID

VALID