INTERFACE CHIP AND BUILT-IN SELF-TEST METHOD THEREFOR

摘要

An interface chip with a built-in self-test mechanism. An electrical physical layer (EPHY) provides a signal to a transmission terminal of the interface chip, and gets a signal from a reception terminal of the interface chip. A digital code generator generates a source code to be scrambled as a scrambled code and then encoded by an encoder and conveyed to the EPHY to be converted into the signal that is provided to the transmission terminal by the EPHY. The EPHY further converts the signal received from the reception terminal into a receiving code to be decoded by a decoder as a decoded code and then descrambled by the descrambler as a restored code. When the transmission terminal is coupled back to the interface chip via the reception terminal, the code checker checks whether the restored code matches the source code.

主权项

1. An interface chip, comprising:
an electrical physical layer, providing a signal to a transmission terminal of the interface chip, and receiving a signal from a reception terminal of the interface chip; a digital code generator, generating a source code; a scrambler, scrambling the source code to generate a scrambled code; an encoder, encoding the scrambled code and outputting an encoded and scrambled code to the electrical physical layer to be converted to the signal that is provided to the transmission terminal by the electrical physical layer; a decoder, decoding a receiving code to generate a decoded code, wherein the receiving code is received from the electrical physical layer that converts the signal received from the reception terminal to the receiving code; a descrambler, descrambling the decoded code to generate a restored code; and a code checker, receiving the restored code, wherein the code checker checks whether the restored code matches the source code when the transmission terminal is coupled back to the interface chip via the reception terminal.