STK15C88 데이터 시트보기 (PDF) - Simtek Corporation

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STK15C88

32Kx8 PowerStore nvSRAM

Simtek Corporation 

SOFTWARE STORE/RECALL MODE SELECTION

STK15C88

E

W

L

H

A13 - A0 (hex)

0E38

31C7

03E0

3C1F

303F

0FC0

MODE

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Read SRAM

Nonvolatile STORE

I/O

Output Data

Output Data

Output Data

Output Data

Output Data

Output High Z

NOTES

l, m

0E38

Read SRAM

Output Data

31C7

Read SRAM

Output Data

03E0

Read SRAM

Output Data

L

H

3C1F

Read SRAM

Output Data

l, m

303F

Read SRAM

Output Data

0C63

Nonvolatile RECALL

Output High Z

Note l: The six consecutive addresses must be in the order listed. W must be high during all six consecutive E controlled cycles to enable a nonvola-

tile cycle.

Note m: While there are 15 addresses on the STK15C88, only the lower 14 are used to control software modes.

SOFTWARE STORE/RECALL CYCLEn, o

(VCC = 5.0V ± 10%)

NO. SYMBOLS

PARAMETER

STK15C88-25

MIN

MAX

STK15C88-45

MIN

MAX

UNITS

26

tAVAV

STORE/RECALL Initiation Cycle Time

27

tAVELn

Address Set-up Time

28

tELEHn

Clock Pulse Width

29

tELAXg, n

Address Hold Time

25

45

ns

0

0

ns

20

30

ns

20

20

ns

30

tRECALL

RECALL Duration

20

20

μs

Note n:

Note o:

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.

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 Controlledo

ADDRESS

26

tAVAV

ADDRESS #1

26

tAVAV

ADDRESS #6

27

tAVEL

28

tELEH

E

DQ (DATA

29

tELAX

DATA VALID

/ 23

30

tSTORE tRECALL

DATA VALID

HIGH IMPEDANCE

Document Control #ML0016 Rev 2.0

7

Jan, 2008

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