Cypress CY7C1473V25, CY7C1475V25, CY7C1471V25 manual Switching Waveforms, Rite, Read

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CY7C1471V25

CY7C1473V25

CY7C1475V25

Switching Waveforms

Figure 1 shows read-write timing waveform.[19, 20, 21]

			Figure 1. Read/Write Timing
1	2	tCYC 3	4	5	6	7	8	9	10
CLK
tCENS tCENH	tCH	tCL

CEN

tCES tCEH

CE

ADV/LD

W E

BW X

ADDRESS A1 A2

	tAS tAH
DQ		D(A1)
	tDS	tDH
OE
COM M AND	W RITE	W RITE
	W RITE	W RITE
	D(A1)	D(A2)

	A3	A4			A5	A6	A7
	tCDV
	tCLZ	tDOH		tOEV	tCHZ
D(A2)	D(A2+1)	Q(A3)	Q(A4)		Q(A4+1)	D(A5)	Q(A6)	D(A7)
			tOEHZ		tDOH
					tDOH
				tOELZ
BURST	READ	READ	BURST		W RITE	READ	W RITE	DESELECT
W RITE	Q(A3)	Q(A4)	READ		D(A5)	Q(A6)	D(A7)
D(A2+1)			Q(A4+1)

DON’T CARE

UNDEFINED

Notes

19.For this waveform ZZ is tied LOW.

20.When CE is LOW, CE1 is LOW, CE2 is HIGH, and CE3 is LOW. When CE is HIGH, CE1 is HIGH, CE2 is LOW or CE3 is HIGH.

21.Order of the Burst sequence is determined by the status of the MODE (0 = Linear, 1 = Interleaved). Burst operations are optional.

Document #: 38-05287 Rev. *I

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Contents Features Functional Description1Selection Guide 133 MHz 100 MHz UnitLogic Block Diagram CY7C1471V25 2M x Logic Block Diagram CY7C1473V25 4M xLogic Block Diagram CY7C1475V25 1M x Pin Configurations Pin Tqfp Pinout CY7C1471V25CY7C1473V25 CY7C1473V25 4M x ADV/LD Pin Definitions Single Read Accesses Burst Read AccessesSingle Write Accesses Functional OverviewInterleaved Burst Address Table Mode = Floating or VDD Linear Burst Address Table Mode = GNDZZ Mode Electrical Characteristics Truth Table Address OperationUsed Truth Table for Read/Write FunctionFunction BW b BW a TAP Controller State Diagram TAP Controller Block DiagramIeee 1149.1 Serial Boundary Scan Jtag TAP Registers TAP Instruction SetTAP Timing BypassTAP AC Switching Characteristics Parameter Description Min Max Unit ClockOutput Times Hold TimesTAP DC Electrical Characteristics And Operating Conditions 8V TAP AC Test Conditions5V TAP AC Test Conditions Scan Register Sizes Identification CodesRegister Name Bit Size Instruction Code DescriptionBoundary Scan Exit Order 2M x Boundary Scan Exit Order 4M xBit # Ball ID Boundary Scan Exit Order 1M x P10W10 V10Electrical Characteristics Maximum RatingsOperating Range Capacitance Thermal ResistanceAC Test Loads and Waveforms Switching Characteristics Setup TimesParameter Description 133 MHz 100 MHz Unit Min CENSwitching Waveforms RiteRead Address QA2Stall Stall NOPDON’T Care Ordering Information Package Diagrams Pin Thin Plastic Quad Flatpack 14 x 20 x 1.4 mmBall Fbga 15 x 17 x 1.4 mm Ball Fbga 14 x 22 x 1.76 mm Issue Orig. Description of Change Date Document HistoryVKN VKN/AESA