Receiving and sending integrated chip for olt

Abstract

A receiving and sending integrated chip for an OLT, which relates to the field of integrated circuits and optical communications. The present invention arms at resolving the problem of high production costs and long production cycle due to the fact that the functions of a limiting amplifier and a laser driver of a traditional OLT end optical module based on a GPON and an EPON are implemented by means of two circuit chips. The present invention provides two solutions. The first solution is designed based on the EPON, a transmitter threshold value configuration mode is that the threshold value configuration is implemented after an upper computer and a slave IC circuit in the chip cooperate to complete electrifying, and LOS signal determination in a receiver can be automatically reset by means of a chip internal module. The second solution is designed based on the GPON, the transmitter threshold value configuration mode is that the threshold value configuration is implemented after the upper computer and the slave IC circuit in the chip cooperate to complete electrifying, LOS signal determined in the receiver can be automatically reset by means of the chip internal module and can also by manually reset by means of chip external RESET signals in cooperation with a corresponding peripheral circuit, and LOS and SD signal output selection pins are arranged.