USB4 E-Marker Chip Explained

E-Marker (Electronically Marked Cable) can simply be understood as the electronic label of the Type-C line, which can read the specified functional properties of cables through the E-Marker chip, such as power transmission, data transmission, video transmission and ID. On this basis, the output end is able to adjust the matching voltage/flow or audio-video signal to the connecting device, such as a mobile phone or monitor. In the past, the E-Marker chip had to be imported, Cyprus and Intel had strong products of the E-Marker chip, and Apple had customised the E-Marker USB 4 chip JHL 7040 to be used on a lightning interface. In recent years, thanks to the efforts of some domestic companies, the national production of E-maker chips that support USB 4 has also begun to be negotiated.

With. In October 2020, the Chengdu Euphoria Semiconductor launched the first E-Marker Chip 8821 in the interior of the world, certified through USB-IF USB 4, and a number of companies have since launched products on USB 4 E-Marker.

Use of E-mark Principle I: If you want to provide more than 5V voltage through the USB TYPE-C interface, or more than 3A current, you will need the TYPE-C interface chip to make the USB PD protocol operational.
Use of E-mark II principle: If your equipment uses 5V voltage and does not exceed 3A currents. It depends on the electrical and data transmission characteristics of the equipment itself, and you do not need a TYPE-C chip if the equipment itself provides electricity only externally, or only receives it from the other side, and if the power function is matched by the data transmission role by a default (i.e., the power supply is HOST, the power supply is Slave or device).
Use of E-mark third principle: These two principles are used to determine whether a TYPE-C chip is needed on the equipment, and whether an E-MARKER chip is needed on the C-C transmission line of interest, the test being whether the current will exceed 3A during use. If this does not exceed, then the line A to C, B to C will not be required, depending on whether the Battery Charging agreement is required, and if so, the LDR6013 will be used, with the benefit of being able to charge both the charge and the transmission of data and avoiding the inability of certain adaptors that do not comply with the Battery Charging Agreement to charge apple equipment.

The USB data lines now begin to require chip applications, if there is to be an efficient data transfer, high-resolution video transmission through a USB Type-C data line, and a strong equipment power supply capacity, if there is to be a chip capacity to assist in supporting multiple high-speed interface protocols, including USB4, DisplayPort 1.4a TX, PCI Express and Thunderbolt 4, which will require the support of the chip, and if the USB4 router IP builds an effective connection between all supporting protocols through a chip, the USB4 line requires information from IC to ensure the quality of high-speed signal transmission, and from cable storage, including the possibility of supporting vehicle-borne currents of 3A to 5A. Because now the speed of transmission is faster, the fastest single channel is now 20 Gbps, and the wires cannot be too short to guarantee the quality of the signal.A chip is typically added for functions such as Re-timer and Re-driver, which restores the role of data, and Re-driver enhances the performance of decay-consumption signals, which allow for accurate and stable transmission of high-speed signals at specified distances. And one of the things we're talking about today is the E-mark chip, which supports USB PD communication.By communicating with the chip, in addition to the ID information on the cable, it is possible to know whether the supported current exceeds 3A, so that a distinction can be made between cables with large currents and cables under 3As. If we can satisfy the use of large currents, we have cables that protect less than 3As, USB 3.0 has the maximum transmission speed of 5 Gbps, and carry no more than 3As, so we don't need more than IC. As the product upgrades, the chips will increasingly be applied to the product, so don't get me wrong.E-mark chipJust.