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Cypress CYDC256B16 Busy Timing Diagram No.1 CE Arbitration CEL Valid First54, CER Valid First

Models: CYDC256B16 CYDC128B16 CYDC128B08 CYDC064B08 CYDC064B16

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CYDC256B16, CYDC128B16,

CYDC064B16, CYDC128B08,

CYDC064B08

Switching Waveforms (continued)

Busy Timing Diagram No.1 (CE Arbitration)

CEL Valid First[54]

ADDRESSL,R

CEL

CER

BUSYR

ADDRESS MATCH

tPS

tBLC

tBHC

CER Valid First

ADDRESSL,R

ADDRESS MATCH

CER

CEL

BUSYL

tPS

tBLC

tBHC

Busy Timing Diagram No.2 (Address Arbitration)[54]

Left Address Valid First

tRC or tWC

ADDRESSL

ADDRESS MATCH

ADDRESS MISMATCH

tPS

ADDRESSR

tBLA

tBHA

BUSY

R

Right Address Valid First

ADDRESSR

ADDRESSL

BUSYL

tRC or tWC

ADDRESS MATCH		ADDRESS MISMATCH

tPS

tBLA

tBHA

Note:

54. If tPS is violated, the busy signal will be asserted on one side or the other, but there is no guarantee to which side BUSY will be asserted.

Document #: 001-01638 Rev. *E

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Cypress CYDC256B16 Busy Timing Diagram No.1 CE Arbitration CEL Valid First54, CER Valid First, Right Address Valid First

Contents

CYDC256B16, CYDC128B16 CYDC064B16, CYDC128B08 CYDC064B08 FeaturesSelection Guide for VCC = Unit CYDC256B16, CYDC128B16 Pin Configurations 3, 4, 5, 6 Pin Tqfp Top View Pin Configurations 7, 8, 9 CYDC064B08 Pin Definitions Functional Description Master/Slave InterruptsBusy Input Read Register Architecture Input Read Register Operation16 0 -I/O 2 -I/O Mode0 -I/O 5 -I/O Mode Semaphore Operation Example Function Maximum Ratings23 Electrical Characteristics for V CC =Range Ambient Temperature Operating Range Input Leakage Current Standb y Cur rent One Port Cmos Ind Input High Voltage 5V any port Output LOW Voltage I OL = 2 mA 5V any port 0V any portODR Output LOW Voltage I OL = 8 mA 5V any port 0V any port Input LOW Voltage 5V any port 0V any port Capacitance Parameter Description Test Conditions Max Unit AC7Test Loads and Waveforms Write Cycle Interrupt Timing Busy TimingSemaphore Timing High after Slave Data Hold From Write End Document # 001-01638 Rev. *E SEM Address Access Time Document # 001-01638 Rev. *E Read Cycle No.2 Either Port CE/OE Access36, 39 Switching WaveformsRead Cycle No.1 Either Port Address Access36, 37 Read Cycle No Either Port36, 38, 41 Write Cycle No CE Controlled Timing 41, 42, 43 Timing Diagram of Semaphore Contention51 Semaphore Read After Write Timing, Either Side49 Timing Diagram of Read with Busy M/S=HIGH53 Write Timing with Busy Input M/S = LOW CER Valid First Busy Timing Diagram No.1 CE Arbitration CEL Valid First54Right Address Valid First Right Side Sets Intl Interrupt Timing Diagrams Left Side Sets INT RRight Side Clears INT R Left Side Clears INT L Ordering Information Package Diagram Pin Thin Plastic Quad Flat Pack Tqfp A100 Issue Date Orig. Description of Change Document History