公开(公告)号：US11552873B2

公开(公告)日：2023-01-10

申请号：US16693144

申请日：2019-11-22

Applicant: CREDO TECHNOLOGY GROUP LIMITED

Inventor： Yifei Dai ,  Yattung Lam ,  Rajan Pai

IPC: H04L43/18 ,  G06F11/36 ,  H04L69/32

Abstract: A cable, a manufacturing method, and a usage method, each facilitate product development, testing, and debugging. An illustrative embodiment of a cable manufacturing method includes: connecting a first connector plug to a first data recovery and re-modulation (DRR) device and to a first controller device; and coupling electrical signal conductors to the first DRR device to convey electrical transit signals to and from a second DRR device, the second DRR device being connected to a second connector plug. The first controller device is operable in response to a host command to initiate a debug dump by the first DRR device and to store the debug dump in a nonvolatile memory.

公开(公告)号：US11137550B2

公开(公告)日：2021-10-05

申请号：US16695178

申请日：2019-11-26

Applicant: CREDO TECHNOLOGY GROUP LIMITED

Inventor： Baohua Chen ,  Sai Ingale ,  Jianfa Chen ,  Rajan Pai ,  Yattung Lam

IPC: G02B6/38 ,  G06F1/26 ,  H04L12/40 ,  H04L12/26

Abstract: A cable, a manufacturing method, and a usage method, each facilitate product development, testing, and debugging. An illustrative embodiment of a cable manufacturing method includes: connecting a first end connector plug to a first data recovery and re-modulation (DRR) device and to a first controller device; and providing a bypass switch that operates under control of the first controller device to merge the command bus with the configuration bus, thereby enabling direct access to the configuration bus by the first host interface port. The first end connector plug has: a set of dedicated pins for conveying mufti-lane data streams between the first DRR device and a first host interface port; and additional pins for a two-wire command bus conveying communications between the first host interface port and a first controller device, the first controller device operable to configure the first DRR device via a two-wire configuration bus.

公开(公告)号：US10944584B1

公开(公告)日：2021-03-09

申请号：US16678790

申请日：2019-11-08

Applicant: CREDO TECHNOLOGY GROUP LIMITED

Inventor： Lawrence Chi Fung Cheng ,  Rajan Pai

IPC: H04L5/16 ,  H04L12/28 ,  H04L25/03 ,  H04L25/49

Abstract: Mass-manufactured cables suitable for large communication centers may convert from differential PAM4 interface signaling to parallel single-ended NRZ transit signaling at 53.125 GBd to provide bidirectional data rates up to 800 Gbps and beyond. One illustrative cable embodiment includes: electrical conductors connected between a first connector and a second connector, each adapted to fit into an Ethernet port of a corresponding host device to receive an electrical input signal to the cable conveying an outbound data stream from the host device and to provide an electrical output signal from the cable conveying an inbound data stream to that host device. The electrical input and output signals employ differential PAM4 modulation to convey the inbound and outbound data streams. Each of the first and second connectors includes transceivers to perform clock and data recovery on the electrical input signal to extract and re-modulate the outbound data stream for transit via the electrical conductors as respective pairs of electrical transit signals employing single-ended NRZ modulation.