STK16C68

March 2006

6

Document Control # ML0010 rev 0.2

SOFTWARE STORE/RECALL MODE SELECTION

Note l:

The six consecutive addresses must be in the order listed. W must be high during all six consecutive cycles to enable a nonvolatile cycle.

SOFTWARE STORE/RECALL CYCLEm, n

Note m: The software sequence is clocked with E controlled READs.

Note n:

The six consecutive addresses must be in the order listed in the Software STORE/RECALL Mode Selection Table: (0000, 1555, 0AAA, 1FFF,

10F0, 0F0F) for a STORE cycle or (0000, 1555, 0AAA, 1FFF, 10F0, 0F0E) for a RECALL cycle. W must be high during all six consecutive

cycles.

SOFTWARE STORE/RECALL CYCLE: E Controlledn

E

W

G

MODE

I/O with G Low

I/O with G High

NOTES

L

H

X

0000

1555

0AAA

1FFF

10F0

0F0F

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Nonvolatile

STORE

Output Data

Output Data

Output Data

Output Data

Output Data

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

l

L

H

X

0000

1555

0AAA

1FFF

10F0

0F0E

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Nonvolatile

RECALL

Output Data

Output Data

Output Data

Output Data

Output Data

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

Output High Z

l

NO.

SYMBOLS

PARAMETER

STK16C68-25

STK16C68-35

STK16C68-45

UNITS

MIN

MAX

MIN

MAX

MIN

MAX

26

STORE/RECALL Initiation Cycle Time

25

35

45

ns

27

m

Address Set-up Time

0

0

0

ns

28

m

Clock Pulse Width

20

25

30

ns

29

g, m

Address Hold Time

20

20

20

ns

30

RECALL Cycle Duration

20

20

20

μs

31

STORE Cycle Duration

10

10

10

ms

HIGH IMPEDANCE

ADDRESS #6

ADDRESS #1

DATA VALID

26

DATA VALID

DQ (DATA OUT)

E

ADDRESS

31

30

26

27

28

29