8

Feb, 2008

Document Control #ML0014 Rev 2.0

STK14C88

SOFTWARE STORE/RECALL MODE SELECTION

SOFTWARE-CONTROLLED STORE/RECALL CYCLEv

e

Note r:

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

cycle.

Note s:

While there are 15 addresses on the STK14C88, only the lower 14 are used to control software modes.

Note t:

Note u:

The software sequence is clocked on the falling edge of E controlled READs without involving G (double clocking will abort the sequence). See

application note: MA0002 http://www.simtek.com/attachments/appNote02.pdf.

Note v:

The six consecutive addresses must be in the order listed in the Software STORE/RECALL Mode Selection Table: (0E38, 31C7, 03E0, 3C1F,

303F, 0FC0) for a STORE cycle or (0E38, 31C7, 03E0, 3C1F, 303F, 0C63) for a RECALL cycle. W must be high during all six consecutive

cycles.

SOFTWARE STORE/RECALL CYCLE: E CONTROLLEDv

E

W

MODE

I/O

POWER

NOTES

LH

0E38

31C7

03E0

3C1F

303F

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Output Data

Output Data

Output Data

Output Data

Output Data

Active

n, r, s, t

0FC0

Nonvolatile

STORE

Output High Z

LH

0E38

31C7

03E0

3C1F

303F

0C63

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

Active

n, r, s, t

NO.

SYMBOLS

PARAMETER

STK14C88-25

STK14C88-35

STK14C88-45

UNITS NOTES

Standard

Alternate

MIN

MAX

MIN

MAX

MIN

MAX

33

STORE

/RECALL Initiation Cycle Time

25

35

45

ns

n

34

Address Set-up Time

0

0

0

ns

u,v

35

Clock Pulse Width

20

25

30

ns

u,v

36

Address Hold Time

20

20

20

ns

u, v

37

RECALL

Duration

20

20

20

μs

DATA VALID

HIGH IMPEDANCE

ADDRESS #6

ADDRESS #1

DATA VALID

33

DATA VALID

DQ (DATA

E

ADDRESS

28

37

33

34

35

36