FTR-1621-XX WDM GBIC

Product Specification - March 2002

F i n i s a r

© Finisar Corporation 01-Mar-02 Rev.F

Page 7

VIII. Serial Communication Protocol

All Finisar optical GBICs are ‘Module Definition “4”’ and support the 2 wire serial

All Finisar optical GBICs also incorporate a microcontroller that monitors system

parameters such as laser current, laser temperature, and, in the case of

13xx/14xx/15xx/16xx nm parts, transmitted power. For a complete description of how to

with a slow slave device, and it requires that the host monitor the clock line every time it releases the line

high. If a host does not implement clock stretching (drives the bus blind), it must run the clock below

8kHz, so that Finisar’s microcontroller has time to process instructions. If clock stretching is supported, the

clock may be run at up to 100kHz.

Parameter

Symbol Min

Typ

Max

Units Notes/Conditions

0

100,000

Hz

Bus can be driven blind.

Finisar Microcontroller

10

100,000

Hz

Host must support clock stretching.

Microcontroller times out if C <

10Hz.

Finisar Microcontroller

10

8000

Hz

Bus can be driven blind.

Microcontroller times out if C <

10Hz.