U631H64

8

March 31, 2006

STK Control #ML0045

Rev 1.0

n:

The software sequence is clocked with E controlled READs.

o:

Once the software controlled STORE or RECALL cycle is initiated, it completes automatically, ignoring all inputs.

p:

q:

r:

Noise on the E pin may trigger multiple READ cycles from the same address and abort the address sequence.

s:

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

No. Software Controlled STORE/RECALL

Symbol

25

35

45

Unit

Alt.

IEC

Min. Max. Min. Max. Min. Max.

25 STORE/RECALL Initiation Time

25

35

45

ns

600

600

600

ns

10

10

10

ms

20

20

20

μs

00

0

ns

20

25

35

ns

00

0

ns

Ai

E

DQi

Output

High Impedance

ADDRESS 1

VALID

VALID

ADDRESS 6

(25)

(25)

(31)

(30)

Ai

E

DQi

Output

High Impedance

ADDRESS 1

VALID

VALID

ADDRESS 6

(28)

(25)

(31)

(30)

(29)

(31)

(30)

(29)

(5)

(29)

(28)

t:

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 U631H64 performs a STORE

or RECALL.

u:

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