Finisar FWDM-1629-XX manual IX. Serial Communication Protocol, E2PROM Description TBD pending MSA

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FWDM-1629-XX DWDM SFP Preliminary Product Specification – February 2005

F i n i s a r

IX. Serial Communication Protocol

All Finisar SFPs support the 2-wire serial communication protocol outlined in the SFP MSA1. These SFPs use an Atmel AT24C01A 128 byte E2PROM with an address of A0h. For details on interfacing with the E2PROM, see the Atmel data sheet titled “AT24C01A/02/04/08/16 2-Wire Serial CMOS E2PROM.”4

Finisar’s DWDM SFPs also support extended diagnostic features as described in Finisar Applications Note AN-2030, “Digital Diagnostic Monitoring Interface for Optical Transceivers”2. A controller IC that monitors system parameters such as laser current, module temperature, transmitter power, and received power is accessible at address A2H.

Parameter	Symbol	Min	Typ	Max	Units	Notes/Conditions

I2C Clock for Atmel	Catmel	0		100,000	Hz	Bus can be driven blind.
(A0H) and Controller
IC (A2H)

( E2PROM Description TBD pending MSA)

© Finisar Corporation	PRELIMINARY and Confidential	Page 8
Rev C, February 2005

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Contents N i s a r Product Selection Product Code Frequency THz Center Wavelength nmCircuit ground is internally isolated from chassis ground Pin Symbol Name/DescriptionPin Descriptions II. Absolute Maximum Ratings Diagram of Host Board Connector Block Pin Numbers and NamesParameter Symbol Min Typ Max Unit Low Speed Signals Parameter Symbol Min Typ Max UnitsOptical Parameters VII. General Specifications VIII. Environmental SpecificationsParameter Symbol Min Max Units VI. Wavelength StabilizationIX. Serial Communication Protocol E2PROM Description TBD pending MSAMechanical Specifications Dwdm SFP Outline DrawingFor More Information XI. Ordering Information Part Number DescriptionXII. References