Cypress STK16C88 manual Switching, Min Max Parameter

										STK16C88
Table 4. SRAM Write Cycle
	Parameter			Description			25 ns		45 ns		Unit
Cypress		Alt					Min	Max	Min	Max
Parameter
tWC		tAVAV		Write Cycle Time			25		45		ns
tPWE		tWLWH, tWLEH		Write Pulse Width			20		30		ns
tSCE		tELWH, tELEH		Chip Enable To End of Write			20		30		ns
tSD		tDVWH, tDVEH		Data Setup to End of Write			10		15		ns
tHD		tWHDX, tEHDX		Data Hold After End of Write			0		0		ns
tAW		tAVWH, tAVEH		Address Setup to End of Write			20		30		ns
tSA		tAVWL, tAVEL		Address Setup to Start of Write			0		0		ns
tHA		tWHAX, tEHAX		Address Hold After End of Write			0		0		ns
tHZWE [7,8]		tWLQZ		Write Enable to Output Disable				10		15	ns
tLZWE [7]		tWHQX		Output Active After End of Write			5		5		ns
Switching		Waveforms	Figure 7. SRAM Write Cycle 1:			Controlled [9]
					WE

	tWC
ADDRESS
	tSCE
CE
	tAW
	tSA
WE	tPWE
	tSD
DATA IN	DATA VALID
	tHZWE
	HIGH IMPEDANCE

DATA OUT PREVIOUS DATA

tHA

tHD

tLZWE

ADDRESS

CE

WE

DATA IN

Figure 8. SRAM Write Cycle 2: CE Controlled [9]

tWC

tSA tSCE tHA

tAW

tPWE

tSD tHD

DATA VALID

DATA OUT

Notes

HIGH IMPEDANCE

8.If WE is Low when CE goes Low, the outputs remain in the high impedance state.

9.CE or WE must be greater than VIH during address transitions.

Document Number: 001-50595 Rev. ** Page 9 of 14

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