STK1744-D35I データシートの表示（PDF） - Unspecified

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コンポーネント説明

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STK1744-D35I

nvTime™ 32K x 8 AutoStore™ nvSRAM with Real-Time Clock

Unspecified 

STK1744

SOFTWARE STORE/RECALL MODE SELECTION

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

k, l

0E38

Read SRAM

Output Data

31C7

Read SRAM

Output Data

L

H

03E0

3C1F

Read SRAM

Read SRAM

Output Data

Output Data

k, l

303F

Read SRAM

Output Data

0C63

Nonvolatile RECALL

Output High Z

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

Note l: While there are 15 addresses on the STK1744, only the lower 14 are used to control software modes.

SOFTWARE STORE/RECALL CYCLEm, n

(VCC = 5.0V ± 10%)

NO. SYMBOLS

PARAMETER

STK1744-25

MIN

MAX

STK1744-35

MIN

MAX

STK1744-45

MIN

MAX

UNITS

26

tAVAV

STORE/RECALL Initiation Cycle Time

27

tAVELm

Address Set-up Time

28

tELEHm

Clock Pulse Width

29

tELAXf, m

Address Hold Time

25

35

45

ns

0

0

0

ns

20

25

30

ns

20

20

20

ns

30

tRECALL

RECALL Duration

20

20

20

µs

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: (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 Controlled

ADDRESS

26

tAVAV

ADDRESS #1

26

tAVAV

ADDRESS #6

27

tAVEL

28

tELEH

E

DQ (DATA OUT)

29

tELAX

DATA VALID

/ 23

30

tSTORE tRECALL

DATA VALID

HIGH IMPEDANCE

January 2003

6 Document Control # ML0020 rev 0.0

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