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 | | |
