Cypress STK22C48 Manual de usuario descargar pdf (Pagina 10)

STK22C48

Document Number: 001-51000 Rev. ** Page 10 of 14

AutoStore or Power Up RECALL

Parameter Alt Description

STK22C48

Unit

Min Max

HRECALL

[12]

RESTORE

Power up RECALL Duration 550 μs

STORE

[14, 15]

HLHZ

STORE Cycle Duration 10 ms

DELAY

[13]

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

VSBL

[10]

Low Voltage Trigger (V

SWITCH

) to HSB Low 300 ns

Switching Waveform

Figure 11. AutoStore/Power Up RECALL

Notes

12. t

HRECALL

starts from the time V

rises above V

SWITCH

13. CE

and OE low for output behavior.

14. CE

and OE low and WE high for output behavior.

15. 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.

[+] Feedback

1 2 ... 5 6 7 8 9 10 11 12 13 14

STK22C48 1
SRAM Read Cycle 8
SRAM Write Cycle 9
HRECALL 10
Products 14
PSoC Solutions 14

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Cypress STK22C48 Manual de usuario Pagina 10

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