Cypress CY7C1440AV33, CY7C1446AV33, CY7C1442AV33 manual Write Cycle Timing26

Page 22

CY7C1440AV33

CY7C1442AV33

CY7C1446AV33

Switching Waveforms (continued)

Write Cycle Timing[26, 27]

tCYC

CLK

tCH

tCL

tADS

tADH

ADSP

tADS

tADH

ADSC extends burst

tADS

tADH

ADSC

tAS

tAH

ADDRESS

Byte write signals are

ignored for first cycle when

tWES tWEH

ADSP initiates burst

BWE,

BWX

tWES tWEH

tCES

tCEH

tADVS tADVH

ADV

ADV suspends burst

tDS

tDH

Data In (D)

High-Z

D(A1)

D(A2)

D(A2 + 1)

D(A2 + 2)

D(A2 + 3)

D(A3)

D(A3 + 1)

D(A3 + 2)

OEHZ

Data Out (Q)

BURST READ	Single WRITE	BURST WRITE
	DON’T CARE	UNDEFINED

Note:

27. Full width write can be initiated by either GW LOW; or by GW HIGH, BWE LOW and BWX LOW.

Extended BURST WRITE

Document #: 38-05383 Rev. *E

Page 22 of 31

[+] Feedback

Image 22

Contents Selection Guide FeaturesFunctional Description1 250 MHz 200 MHz 167 MHz UnitLogic Block Diagram CY7C1440AV33 1M x Logic Block Diagram CY7C1442AV33 2M xCY7C1440AV33 Pin Configurations Pin Tqfp Pinout CY7C1442AV33 2M xCY7C1442AV33 2M x Name Description Pin DefinitionsByte Write Select Inputs, active LOW. Qualified with Ground for the core of the device Power supply inputs to the core of the devicePower supply for the I/O circuitry Ground for the I/O circuitryFunctional Overview Linear Burst Address Table Mode = GND Interleaved Burst Address Table Mode = Floating or VDDZZ Mode Electrical Characteristics Write Cycle, Suspend Burst Truth Table for Read/Write4,8,9Truth Table for Read/Write4, 8 Function CY7C1440AV33TAP Controller Block Diagram TAP Controller State DiagramIeee 1149.1 Serial Boundary Scan Jtag TAP Registers Performing a TAP ResetTAP Instruction Set TAP Timing Bypass5V TAP AC Test Conditions TAP AC Switching Characteristics Over the operating Range103V TAP AC Test Conditions 5V TAP AC Output Load EquivalentScan Register Sizes TAP DC Electrical Characteristics And Operating ConditionsIdentification Register Definitions Identification CodesBypass Ball Fbga Boundary Scan Order 14,15SAMPLE/PRELOAD CY7C1440AV33 1M x 36, CY7C1442AV33 2M x Bit # Ball IDBall Fbga Boundary Scan Order 14 CY7C1446AV33 512K x Bit # Ball IDOperating Range Electrical Characteristics Over the Operating Range17Maximum Ratings Ambient RangeThermal Resistance Capacitance19AC Test Loads and Waveforms Min Max Switching Characteristics Over the Operating Range 24250 200 167 Parameter Description Unit Min Set-up TimesSwitching Waveforms Read Cycle Timing26Write Cycle Timing26 Read/Write Cycle Timing26, 28 CLZZZ Mode Timing30 DON’T CareOrdering Information 250 Package Diagrams Pin Tqfp 14 x 20 x 1.4 mmBall Fbga 15 x 17 x 1.4 mm Ball Fbga 14 x 22 x 1.76 mm Document History Issue Date Orig. Description of ChangeDocument Number 473650 AC Switching Characteristics tableUpdated the Ordering Information table VKN