Cypress CY14E256L Bedienungsanleitung PDF herunterladen (Seite 12)

CY14E256L

Document Number: 001-06968 Rev. *H Page 12 of 19

AutoStore or Power Up RECALL

Parameter Alt Description

CY14E256L

Unit

Min Max

HRECALL

[15]

RESTORE

Power up RECALL Duration 550 μs

STORE

[16]

HLHZ

STORE Cycle Duration 10 ms

DELAY

[16]

HLQZ ,

BLQZ

Time Allowed to Complete SRAM Cycle 1 μs

SWITCH

Low Voltage Trigger Level 4.0 4.5 V

RESET

Low Voltage Reset Level 3.6 V

VCCRISE

Rise Time 150 μs

VSBL

[13]

Low Voltage Trigger (V

SWITCH

) to HSB low 300 ns

Switching Waveforms

Figure 11. AutoStore/Power Up RECALL

Notes

15. t

HRECALL

starts from the time V

rises above V

SWITCH

16. CE

and OE low and WE high for output behavior.

17. HSB

is asserted low for 1us when V

CAP

drops through V

SWITCH

. If an SRAM WRITE has not taken place since the last nonvolatile cycle, HSB is released and no store

takes place.

Not Recommended for New Designs

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256 Kbit (32K x 8) nvSRAM 1
CY14E256L 10
HRECALL 12
Products 19

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