Enhanced digital diagnostics for optical PAM apparatus
View Patent ↗A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.
1. A method comprising:
a module receiving from an optical receiver element, raw parametric information relating to optical data on a plurality of optical lanes;
storing the raw parametric information in a debugging memory;
streaming the raw parametric information from the debugging memory to a master logic system of the module on one of a plurality of electrical lanes of the module;
processing the optical data with the raw parametric information by the master logic system to create diagnostic information;
storing the diagnostic information according to a parameter configuration in a new register of the master logic system, and
sending the diagnostic information to a host via a communications interface.
2. The method of claim 1 wherein:
a number of the plurality of optical lanes differs from a number of the plurality of electrical lanes; and
the parameter configuration further specifies a lane mapping value.
3. The method of claim 2 wherein the optical data is encoded by PAM4.