What the 40nm node means for the instrument cluster: Page 3 of 5

August 02, 2016 //By Mathias Bräuer
What the 40nm node means for the instrument cluster
The 40nm node could enable makers of low- to mid-range vehicles to radically upgrade the traditional instrument cluster. Here's why and how.
even the 40nm devices’ embedded memory provision is not sufficient, however, the Traveo MCUs feature a HyperBus interface, which may be used to connect to external memory. The current generation of HyperRAM and HyperFlash memories from Cypress offer a peak bandwidth of 200MB/s over a 3V HyperBus interface, giving the user high-speed operation while avoiding the high unit cost of DRAM parts.

Crucially, implementation of the Traveo platform design at 40nm allows integration of all the functions of a hybrid instrument cluster:  

  • Communication is provided by up to six channels of Controller Area Network-Flexible Data (CAN-FD) interfacing. An Ethernet AVB media access controller (MAC) enables the device to communicate with a vehicle’s networking backbone. There is also a multi-function serial interface with up to 12 channels.
  • Security of the cluster’s data and signals is safeguarded by the IC’s Secure Hardware Extension (SHE), a secure zone within which the device performs key storage, AES-128 data encryption/decryption and random number generation.
  • Driving the electro-mechanical elements of the cluster – the MCU includes six stepper motor controllers to run needles for the speedometer, rev counter etc.
  • Audio sub-system – a 10-input sound mixer combined with a stereo audio DAC is capable of generating a wide range of sophisticated sounds, and outputting them to the vehicle’s speakers over a two-channel I 2S interface. Cypress provides a sound authoring tool to support this function.
  • LCD controller – the device can drive a TFT-LCD panel of 4 x 32 segments. The device provides a simple RGB888 video output.
  • System control – the ARM Cortex-R5F core supports real-time operations and runs the Autosar 4.0.3 operating system. Real-time capability is crucial for safety-critical functions such as driving the speedometer needle. 

This combination of capabilities makes the latest S6J33xx devices ideal for hybrid clusters with a small display: highly integrated, they enable designers to optimise the size and BoM cost of their system while providing for good-quality

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