Optical transceiver having improved functions to load control program
AssigneeSumitomo Electric Industries, Ltd.
InventorsYasuhiro Tanaka, Hiroto Ishibashi
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Abstract
Methods to load control programs into an optical transceiver whose specifications follow the standards are disclosed. The standard transceiver, such as SFP transceiver and/or XFP transceiver, provides control terminals in addition to the serial interface to communicate with the host device. The control terminals are inactive when the transceiver is output of the host device. The loader to load the program utilizes those control terminals and the optical transceiver of the invention provides mechanisms to use those control terminals for downloading the program.
Claims14
A pluggable optical transceiver to be set in a host system, the pluggable optical transceiver including a controller accompanied with a memory to store a program by which the pluggable optical transceiver monitors and controls statuses within the pluggable optical transceiver, the pluggable optical transceiver providing a first control terminal, a second control terminal, and a third control terminal,
- wherein the first control terminal is pulled down to a ground by a resistor such that the host system detects the existence of the pluggable optical transceiver therein, and
- wherein the controller includes a download interface comprising,
- a clock terminal to receive a download clock to download the program, the clock terminal being coupled with the first control terminal, and
- a data terminal to receive a download data of the program, the data terminal being coupled with the third control terminal,
- wherein the download interface becomes in a hold mode to set the data terminal in high impedance when the pluggable optical transceiver is set in the host system and the first control terminal is set in LOW.
Dependencies are inferred from the claim text.