Cypress STK16C88 manual Software Controlled STORE/RECALL Cycle

									STK16C88
Software Controlled STORE/RECALL Cycle
The software controlled STORE/RECALL cycle follows. [11, 12]
	Parameter		Alt	Description		25 ns			45 ns		Unit
					Min		Max	Min		Max
tRC		tAVAV		STORE/RECALL Initiation Cycle Time	25			45			ns
t	[11]	t	AVEL	Address Setup Time	0			0			ns
	SA
tCW[11]		tELEH		Clock Pulse Width	20			30			ns
tHACE[7, 11]		tELAX		Address Hold Time	20			20			ns
tRECALL				RECALL Duration			20			20	μs

Switching Waveforms

Figure 10. CE Controlled Software STORE/RECALL Cycle [12]

ADDRESS

CE

OE

DQ (DATA)

tRC

ADDRESS # 1

tSA tSCE

tHACE

DATA VALID

tRC

ADDRESS # 6

tSTORE / tRECALL

HIGH IMPEDANCE

DATA VALID

Notes

11.The software sequence is clocked on the falling edge of CE without involving OE (double clocking aborts the sequence).

12.The six consecutive addresses must be read in the order listed in the Mode Selection table. WE must be HIGH during all six consecutive cycles.

Document Number: 001-50595 Rev. ** Page 11 of 14

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