Cypress CY7C1442AV33, CY7C1446AV33, CY7C1440AV33 manual Read/Write Cycle Timing26, 28, Clz

Page 23

CY7C1440AV33

CY7C1442AV33

CY7C1446AV33

Switching Waveforms (continued)

Read/Write Cycle Timing[26, 28, 29]

			tCYC
CLK
		tCH	tCL
	tADS	tADH
ADSP
ADSC
	tAS	tAH
ADDRESS	A1	A2
BWE,
BWX
	tCES	tCEH
CE
ADV
OE
			tCO

A3 A4

tWES tWEH

tDS tDH

A5 A6

Data In (D)	High-Z	t	tOEHZ
		t	tOEHZ
		CLZ
Data Out (Q)	High-Z	Q(A1)	Q(A2)

D(A3)

tOELZ

Q(A4) Q(A4+1) Q(A4+2) Q(A4+3)

D(A5) D(A6)

Back-to-Back READs

Single WRITE	BURST READ
DON’T CARE	UNDEFINED

Back-to-Back

WRITEs

Notes:

28.The data bus (Q) remains in high-Z following a Write cycle, unless a new read access is initiated by ADSP or ADSC.

29.GW is HIGH.

Document #: 38-05383 Rev. *E

Page 23 of 31

[+] Feedback

Image 23

Contents 250 MHz 200 MHz 167 MHz Unit FeaturesFunctional Description1 Selection GuideLogic Block Diagram CY7C1442AV33 2M x Logic Block Diagram CY7C1440AV33 1M xCY7C1440AV33 CY7C1442AV33 2M x Pin Configurations Pin Tqfp PinoutCY7C1442AV33 2M x Byte Write Select Inputs, active LOW. Qualified with Pin DefinitionsName Description Ground for the I/O circuitry Power supply inputs to the core of the devicePower supply for the I/O circuitry Ground for the core of the deviceFunctional Overview ZZ Mode Electrical Characteristics Interleaved Burst Address Table Mode = Floating or VDDLinear Burst Address Table Mode = GND Function CY7C1440AV33 Truth Table for Read/Write4,8,9Truth Table for Read/Write4, 8 Write Cycle, Suspend BurstIeee 1149.1 Serial Boundary Scan Jtag TAP Controller State DiagramTAP Controller Block Diagram TAP Instruction Set Performing a TAP ResetTAP Registers Bypass TAP Timing5V TAP AC Output Load Equivalent TAP AC Switching Characteristics Over the operating Range103V TAP AC Test Conditions 5V TAP AC Test ConditionsIdentification Codes TAP DC Electrical Characteristics And Operating ConditionsIdentification Register Definitions Scan Register SizesCY7C1440AV33 1M x 36, CY7C1442AV33 2M x Bit # Ball ID Ball Fbga Boundary Scan Order 14,15SAMPLE/PRELOAD BypassCY7C1446AV33 512K x Bit # Ball ID Ball Fbga Boundary Scan Order 14Ambient Range Electrical Characteristics Over the Operating Range17Maximum Ratings Operating RangeAC Test Loads and Waveforms Capacitance19Thermal Resistance Set-up Times Switching Characteristics Over the Operating Range 24250 200 167 Parameter Description Unit Min Min MaxRead Cycle Timing26 Switching WaveformsWrite Cycle Timing26 CLZ Read/Write Cycle Timing26, 28DON’T Care ZZ Mode Timing30Ordering Information 250 Pin Tqfp 14 x 20 x 1.4 mm Package DiagramsBall Fbga 15 x 17 x 1.4 mm Ball Fbga 14 x 22 x 1.76 mm Document Number Issue Date Orig. Description of ChangeDocument History VKN AC Switching Characteristics tableUpdated the Ordering Information table 473650