FTR-1629-XX DWDM GBIC Preliminary Product Specification – June 2003
F i n i s a r
IX. Serial Communication Protocol
All Finisar optical GBICs implement serial identification features described for ‘Module
1
Definition “4”’ as outlined in Annex D of the GBIC Specification . These GBICs use an
2
Atmel AT24C01A 128 byte E PROM at address A0H. For details on interfacing with the
E2PROM, see the Atmel data sheet titled “AT24C01A/02/04/08/16 2-Wire Serial CMOS
3
E2PROM.”
Finisar’s DWDM GBICs also support extended diagnostic features as described in
2
Finisar Application Note AN-2030, “Using the Finisar GBIC I2C Test/Diagnostics Port” .
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
Catmel
Max
Units Notes/Conditions
I2C Clock for Atmel
(A0H) and Controller
IC (A2H)
0
100,000
Hz Bus can be driven blind
2
Table 9. I C Timing Requirements
Ó Finisar Corporation
PRELIMINARY and Confidential
Page 8
Rev D, June 2003