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Optical physical layer adds network interface to Renesas vehicle computer

Mon, May 09, 2022

Renesas has integrated KDPOF’s KD1053 PHY IC and KD9351 fibre optic transceiver (FOT) into the automotive vehicle computer VC4, communication gateway engine control unit (ECU). The VC4 integrates an optical Ethernet interface into our automotive evaluation boards. The 1000BASE-RH transceiver KD1053 and KD9351 FOT is certified to IEEE 802.3bv.

In order to meet the increasing complexity and computation demands of the next generation vehicles, the VC4 communication gateway ECU is intended to be a universal development platform for automotive customers based on the R-Car-S4 SoC.

Optical connectivity solves the challenges posed by electrical interference in vehicles, says KDPOF, thanks to the low weight, low cost and electromagnetic compatibility due to inherent galvanic isolation. “With the integrated KD9351 FOT in combination with the KD1053 PHY IC, we deliver a complete automotive 1000BASE-RHC physical layer,” said Carlos Pardo, CEO and co-founder of KDPOF.

Applications include safe Ethernet backbones, smart antenna modules, and sensor connections for advanced driving assistance system (ADAS) and audio/video.

The KD9351 optical transceiver incorporates the transmission and reception optoelectronics – such as transimpedance amplifier, photodiode, LED driver, and LED – into one single component. The KD9351 optical transceiver operates at 100Mbits per second up to 1Gbits per second. In addition to a small footprint, it benefits from a shorter supply chain and no test duplication with the final test at the Tier 1. The assembly is simplified and the connector offers snap-fit without soldering. The KD9351 reuses low-cost MEMs encapsulation and allows surface mount reflow assembly with 8.0 by 7.0mm LGA components. It is shielded against electromagnetic radiation, added KDPOF. The temperature range, from -40 to +105 degrees C, conforms with harsh automotive environmental requirements.

KDPOF will present latest highlights of the optical in-vehicle network technology at the Automotive Ethernet Congress (01 to 02 June 2022 in Munich, Germany). On 2 June, Carlos Pardo will present “Automotive Optical Ethernet Reaching for 50Gbits per second”.

https://www.kdpof.com

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Nexperia extends DFN packaging to AEC-Q101-compliant discretes

Tue, May 03, 2022

Discrete components from Nexperia are now available in miniature DFN packaging with side-wettable flanks. The company has introduced the AEC-Q101-compliant components to save board space in automotive designs.

The components are intended for applications in smart and electric vehicles, explained the company, with AEC-Q101 devices available cuts across all Nexperia’s product groups.

The new releases are the BC817QBH-Q and BC807QBH-Q series 45V, 500mA NPN / PNP general purpose transistors in a DFN1110D-3 package. There is also the BAT32LS-Q and BAT42LS-Q general purpose Schottky diode in a DFN1006BD-2
package and the BAS21LS-Q high-speed switching diode in a DFN1006BD-2 package.

Nexperia has also introduced the PDTA143 / 114 / 124 / 144EQB-Q series 50V 100mA PNP resistor-equipped transistor (RET) family in the DFN1110D-3 package.

Finally, there are two trench MOSFETs, the 2N7002KQB 60V and the BSS84AKQB 50V, P-channel devices, both in the DFN1110D-3 package.

According to Nexperia, leadless DFN packages are up to 90 per cent smaller than SOT23 packages, contributing to a reduction in the amount of board space required for an increasing number of electronic components in vehicles. The side-wettable flank offers very reliable automated optical inspection (AOI) of solder joint quality, added the company. Nexperia’s DFN packages deliver thermal performance with high Ptot and are claimed to be the most rugged in the industry passing extended lifetime and reliability tests.

Nexperia claims to offer the widest range of AEC-Q101 qualified discrete components in these miniature leadless packages. According to Mark Roeloffzen, senior vice president and general manager of Nexperia’s Bipolar Discretes business group, more than 460 different high volume devices are available in the recently released DFN1412D-3, DFN1110D-3, and DFN1006BD-2 packages. “By offering even more devices in these miniature packages, Nexperia provides design engineers with greater opportunities to make their designs future-proof, having an impact on the mobility of the future,” he said.

The new technology already has design-in and commitment from major Tier 1 automotive suppliers, he added.

Samples and production quantities are available now.

http://www.nexperia.com

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Automotive ECU virtualisation ensures multi-zone use

Wed, Apr 27, 2022

Designers can integrate multiple applications into a single engine control unit (ECU) in automotive systems using the Renesas ECU virtualisation platform. Each application can be safely and securely separated to avoid interference. Customers can therefore adopt new electrical-electronic (E/E) architectures using microcontroller-based zone ECUs which support multiple logical ECUs on one physical ECU.

The ECU virtualisation platform combines Renesas’ RH850/U2x microcontrollers and ETAS’ RTA-HVR software, which is a hypervisor designed for microcontrollers with hardware virtualisation support. A demonstrator environment comprises pre-configured embedded software, tools and an interactive demonstrator environment for RH850/U2x microcontrollers.

Reflecting on the move towards zone architecture, Satoshi Yoshida, senior director, Automotive Digital Products marketing at Renesas, said: “The transition . . . increases the design burden by changing the functional role assignments between the central ECU and each zone ECU”.

“Working together with Renesas, we were able to leverage the [hardware] capabilities of the RH850/U2x [microcontrollers] to deliver a high performance, low overhead, embedded hypervisor for automotive applications that complements class-leading AUTOSAR OS technologies,” added Nigel Tracey, vice president of Vehicle Operating Systems at ETAS.

The RH850/U2x microcontrollers including RH850/U2A and RH850/U2B have a set of embedded hardware that realises the integration of multiple ASIL D-compliant software partitions. The microcontrollers are specifically designed for zone-applications targeting reduced ECU component count with minimal re-engineering overhead, explained Renesas. RH850/U2x microcontrollers include features such as hypervisor hardware support, quality of service (RH850/U2B only) support, safety and security functions and a network on chip (NoC) structure to ensure proper real-time behaviour of the individual integrated applications.

The RTA-HVR software works with the hardware virtualisation features of the Renesas RH850U2x microcontrollers to provide one or more virtual machines (VMs). VMs are separated from each other in both space (using the RH850U2x memory protection unit and guard features) and time (using the RTA-HVR VM scheduler) to meet strict automotive safety and security requirements. The RTA-HVR can build a virtual device extension (VDE). Each VM comprises one or more virtual CPU cores, a sub-set of device memory space and a collection of peripherals.

Renesas offers the RH850/U2x Zone-ECU starter kit which provides a “ready to run” configuration of RTA-HVR, showcasing VM configurations which can be single core, multi-core and multi-VM core configurations. Guest software images are provided for each of the configured VMs, including bare metal. Virtual devices are available for peripheral sharing and virtual inter-VM networking; a virtual CAN or controller area network, says Renesas.

A PC-hosted application enables users to observe and interact with the VMs at runtime. The PC application supports triggering faults to explore behaviours as a result of memory violations, for example. It can also update one VM while the other VMs are running using the no-wait OTA capabilities of the RH850/U2x. Other functions are to explore the impact of alternative VM switching mechanisms and enabling developers to see the impact of hardware quality of service features.

The ECU virtualisation software platform, including the RH850/U2x Zone-ECU starter kit will be available from the end of May 2022.

http://www.renesas.com

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Protocol trigger and decode software accelerates CAN bus development

Fri, Apr 22, 2022

Engineers can verify and debug CAN XL and other automotive protocols using the D9010AUTP oscilloscope-based automotive protocol trigger / decode option by Keysight Technologies.

D9010AUTP covers CAN XL (controller area network extra long) to verify and debug low-speed automotive serial bus protocols and simplify the development and troubleshooting of systems including CAN / CAN FD (flexible data rate) and CAN XL.

CAN XL is the third-generation CAN standard in development by the CAN in Automation (CiA) group which increases payload data and bit rate of the established CAN FD protocol. The CAN XL data phase speed is specified to reach 10Mbits per second or more, depending on the transceiver capabilities and physical layer components. CAN XL has two modes of operation – fast mode and SIC (slow) mode.

Keysight’s automotive decoder software triggers and decodes the SIC mode signal in the arbitration phase, as well as the fast mode signal in the data phase. It also handles the CAN XL protocols implemented with the CAN HS / FD / SIC transceivers.

In-vehicle networking is pivotal for transmitting data quickly and reliably from sensors to AI decision making units, as well as between safety relevant electronic control units and electronic systems, explains Thomas Goetzl, vice president and general manager for Keysight’s automotive and energy solutions business unit.

Keysight’s D9010AUTP software is compatible with Keysight’s Infiniium oscilloscopes using software version 11.30 or higher for MXR / EXR / UXR models and version 6.72 or higher for other Infiniium scope models. The combination allows users to set up the oscilloscope to show CAN, LIN, CAN-FD, CAN XL, FlexRay and SENT protocol decode in less than 30 seconds and gain access to integrated protocol-level triggers. The offering also saves time and eliminates errors by viewing packets at the protocol level, advises Keysight while the use of time-correlated views can quickly troubleshoot serial protocol problems back to the timing or signal integrity root cause.

http://www.keysight.com

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Optical physical layer adds network interface to Renesas vehicle computer

Nexperia extends DFN packaging to AEC-Q101-compliant discretes

Automotive ECU virtualisation ensures multi-zone use

Protocol trigger and decode software accelerates CAN bus development

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