Introduction

The NS6238 serializer chip is compliant to Automotive Wired High-Speed Media Transmission (HSMT) standard. Pairing with a compatible HSMT  deserializer, the NS6238 converts DisplayPort/eDP input to dual HSMT outputs for transmission of forward video and bidirectional audio and contro  l data. Each HSMT link operates at a data rate up to 12.8Gbps in the forward direction and 100Mbps in the backward direction. The NS6238 suppo   rts 15 meters Coaxial cable or 8 meters Shielded Twisted Pair (STP) cable at 12.8Gbps. The NS6238 is AEC-Q100 Grade 2 certified with autom otive temperature range of -40°C to +105°C, and meets ISO 10605 and IEC 61000-4-2 ESD requirements.

The NS6238 supports I2C and SPI control ports, flexible GPIO with trigger mode, constant latency mode and oversample mode, tunneled UART, forward and backward audio channels, a built-in ADC, temperature sensor, and an extensive set of diagnostics.

Applications

·           High-resolution Automotive Navigation System

·           Central Information Display (CID)

·           Digital Instrument Clusters

·           Rear Seat Entertainment (RSE)

·           Head Units and HMI Modules

·           Rear View and Side Mirror Displays

Features

·           Single DisplayPort input port

 ·           24/30-bit RGB, and 16/20-bit YUV422

 ·           DP/eDP v1.4 compliant

 ·           1/2/4-lane main link with up to 5.4Gbps/lane

 ·           Hot Plug Dectect and AUX Channel (1Mbps)

 ·           Supports SST or four MST streams

 ·           Supports 4K@60Hz resolutions

 ·           Supports superframe unpacking to up to four video streams

·           HSMT link for system and power flexibility

 ·          Supports two HSMT links

 ·           2.0, 3.2, 4.0, or 6.4Gbps forward-link rates (NRZ)

 ·           8.0, or 12.8Gbps forward-link rates (PAM4)

 ·           100Mbps backward-link rate

·           Robust communication in automotive environment

 ·            Backward channel adaptive equalization

 ·            RS-FEC for protection of forward video and bidirectional control data

 ·            Retransmission

 ·           Backward channel eye timing margin monitor for continuous link margin diagnosis

·           Digital audio with I2S and TDM interface

 ·           Supports forward-direction 7.1 HD audio and up to 192kHz sample rate

 ·           Supports backward-direction 8 channels at 48kHz sample rate or 2 channels at 192kHz sample rate

·           Supports bulk and tunneling modes I2C (master up to 833Kbps, slave up to 1Mbps)

·           Supports SPI (master/slave up to 50Mbps), UART (Tx/Rx), GPIO, and interrupt for touch-screen and other use cases

·           CRC protection of control data over I2C and SPI

·           Video watermark and test pattern generation

·           Supports line fault detection and voltage monitor

·           Programmble spread spectrum for EMI reduction

·           9mm x 9mm 64-pin QFN package

Figure 1. Application Example

Figure 2. NS6238 Pinout