Automotive Ethernet

Automotive Ethernet

Concept

ethernet1

  Automotive Ethernet is a physical network that is used to connect components within a car using a wired network. It is designed to meet the needs of the automotive market, including meeting electrical requirements (EMI/RFI emissions and susceptibility), bandwidth requirements, latency requirements, synchronization, and network management requirements.
Multiple car manufacturers will use Ethernet for cameras (driver assist) and video (infotainment) connections. The move to Ethernet is happening quickly, as the competing technology that supports the required bandwidth (MOST and LVDS serial protocols) are proprietary and expensive.

ethernet2

Their standard for in-vehicle Ethernet over a single twisted pair is shown in above picture. The standard defines new PHYs that connect to standard Ethernet MACs. This means that existing microcontrollers with an Ethernet Media Access Controller (MAC) with a Media Independent Interface (MII) can be mated to an OPEN PHY. The standard supports the standard Ethernet audio/video bridging (AVB) standard, 802.1BA. It also address temperature and EMC details that are critical to automotive applications

Results

Ethernet_des

Automotive Ethernet Transceiver

  • Taped-out in Oct. 2015
  • SK Hynix 60V Automotive 0.13㎛ BCDMOS process
  • Controller, BGR, CDR, Slicer, Equalizer, etc.
  • Size: 1650 x 1150 (um²) (except I/O pads)
  • Operating frequency: 125MHz
  • Data rate : 100Mbps