Cypress CY7C199 manual Read Cycle No 13, Write Cycle No WE Controlled10, 15

			CY7C199
Switching Waveforms (continued)
Read Cycle No. 2 [13, 14]
CE		tRC
	tACE
OE
	tDOE	tHZOE
		tHZCE
	tLZOE		HIGH
DATA OUT	HIGH IMPEDANCE	DATA VALID	IMPEDANCE
	tLZCE	tPD
	tPU
VCC			ICC
SUPPLY	50%		50%
CURRENT			ISB
			C199–9

Write Cycle No. 1 (WE Controlled)[10, 15, 16]

	tWC
ADDRESS
CE
tAW		tHA
tSA	tPWE
WE
OE
	tSD	t
		HD
DATA I/O	DATAIN VALID
tHZOE		C199–10

Write Cycle No. 2 (CE Controlled)[10, 15, 16]

	tWC
ADDRESS
CE	tSCE
tSA
tAW		tHA
WE
	tSD	tHD
DATA I/O	DATA IN VALID	C199–11
Notes:

14.Address valid prior to or coincident with CE transition LOW.

15.Data I/O is high impedance if OE = VIH.

16.If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.

Document #: 38-05160 Rev. ** Page 7 of 16