CY14B256KA

Document #: 001-55720 Rev. *C

Page 21 of 27

Software Controlled STORE/RECALL Cycle

Parameter[30, 31]

Description

25 ns

45 ns

Unit

Min

Max

Min

Max

STORE/RECALL initiation cycle time

25

–

45

–

ns

Address setup time

0–0–

ns

Clock pulse width

20

–

30

–

ns

Address hold time

0–0–

ns

RECALL duration

–

200

–

200

µs

Soft sequence processing time

–

100

–

100

µs

Switching Waveforms

Figure 12. CE & OE Controlled Software STORE/RECALL Cycle [31]

Figure 13. AutoStore Enable/Disable Cycle

t

RC

t

RC

t

SA

t

CW

t

SA

t

LZCE

t

HZCE

t

HA

t

HA

t

t

HHHD

High Impedance

Address #1

Address #6

Address

CE

OE

HSB(STOREonly)

DQ (DATA)

RWI

34

t

RC

t

RC

t

SA

t

CW

t

CW

t

SA

t

HZCE

t

HA

t

HA

t

HA

t

DELAY

Address #1

Address #6

Address

CE

OE

DQ (DATA)

t

SS

Note

34

Notes

30. The software sequence is clocked with CE controlled or OE controlled reads.

31. The six consecutive addresses must be read in the order listed in Table 1. WE must be HIGH during all six consecutive cycles.

32. This is the amount of time it takes to take action on a soft sequence command. Vcc power must remain HIGH to effectively register command.

33. Commands such as STORE and RECALL lock out I/O until operation is complete which further increases this time. See the specific command.

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