Re­ne­sas un­veils radar so­lu­tion to bol­ster ADAS, au­ton­o­mous driv­ing

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Re­ne­sas Elec­tron­ics Cor­po­ra­tion, a pre­mier sup­plier of ad­vanced semi­con­duc­tor so­lu­tions, has an­nounced its first RH850-based, 32bit, au­to­mo­tive radar mi­cro­con­troller (MCU) se­ries, the RH850/V1R. It will de­liver the high per­for­mance and fea­tures re­quired for en­abling fu­ture ad­vanced driver as­sis­tance sys­tems (ADAS) and au­ton­o­mous driv­ing. The RH850/V1R-M, the first prod­uct from the RH850/V1R Se­ries, in­cludes a dig­i­tal sig­nal pro­ces­sor (DSP, Note 1) and high speed se­rial in­ter­faces and is specif­i­cally de­signed for mid­dle-to lon­grange radars.

Soft­ware and tools in­clud­ing eval­u­a­tion boards will also be­come avail­able to en­able the sys­tem devel­op­ers to start their de­vel­op­ment im­me­di­ately with the RH850/V1R-M so­lu­tion. With the ex­pan­sion of ADAS and au­ton­o­mous driv­ing, sen­sors are fast be­com­ing a key tech­nol­ogy. Ad­di­tion­ally, high pre­ci­sion sens­ing be­comes crit­i­cal in re­al­is­ing fu­ture au­ton­o­mous driv­ing to meet the in­creas­ing re­quire­ments of range res­o­lu­tion, sep­a­ra­tion of ob­jects and pre­ci­sion in mea­sure­ment of ve­loc­ity. This re­quires in­creased num­bers of an­ten­nas and boost­ing of the sig­nal pro­cess­ing per­for­mance.

To ad­dress these needs, Re­ne­sas launched the new RH850/V1R-M MCU specif­i­cally de­signed for radar ap­pli­ca­tions in ADAS. The new MCU in­cludes op­ti­mized, pro­gram­mable dig­i­tal sig­nal pro­cess­ing, a dual core at 320 mega­hertz (MHz) with in­dus­trylead­ing high speed flash of 2 megabyte (MB), a 2 MB in­ter­nal RAM, while meet­ing the in­dus­try’s high­est tem­per­a­ture re­quire­ments.

Key fea­tures

High-per­for­mance DSP with flex­i­ble pro­gramma­bil­ity for im­proved radar sig­nal pro­cess­ing per­for­mance and in­creased sens­ing ac­cu­racy. The RH850/V1R-M MCU is de­signed to have op­ti­mised hard­ware ac­cel­er­a­tion in the DSP. The op­ti­mised DSP al­lows the sys­tem devel­op­ers to process the raw data into tar­get ob­jects ef­fi­ciently, separately from the safety rel­e­vant clas­si­fi­ca­tion and track­ing done in the CPUs. Re­ne­sas’ high per­for­mance DSP per­forms radar spe­cific al­go­rithms such as fast fourier trans­forms (FFTs, Note2), beam­form­ing, win­dow­ing, chan­nel cal­i­bra­tion, peak search, at high speed and with low power con­sump­tion. The DSP of­fers high flex­i­ble pro­gramma­bil­ity and Re­ne­sas specif­i­cally de­vel­oped a DSP math li­brary for au­to­mo­tive radar sen­sors to sup­port sys­tem devel­op­ers in their al­go­rithm de­vel­op­ment.

Re­ne­sas low-cost radar sen­sors

The RH850/V1R-M is de­vel­oped us­ing Re­ne­sas’ world lead­ing 40-nanome­ter (nm) em­bed­ded flash (eFlash) process tech­nol­ogy, which has a proven track record in terms of re-write cy­cles, the in­dus­try’s fastest ran­dom ac­cess oper­a­tion speeds and high re­li­a­bil­ity. It also has the merit of low power con­sump­tion as the tran­sis­tors are smaller low­er­ing par­a­sitic ca­pac­i­tances. The process spec­i­fi­ca­tion of RH850/ V1R-M also ful­fills the high­est tem­per­a­ture re­quire­ments in the in­dus­try (T-junc­tion 150°C). The em­bed­ded flash brings ad­van­tage to the sys­tem de­signer by of­fer­ing higher in­te­gra­tion us­ing less PCB space and bet­ter real time be­hav­ior.

Dual core at 320MHz high per­for­mance, in­te­grated 2MB large ca­pac­ity RAM, 2MB high­est speed flash and high­est tem­per­a­ture re­quire­ments. The new RH850/V1R-M fea­tures 2 G3MH CPU cores oper­at­ing at 320 mega­hertz (MHz). The G3MH is a su­per­scalar re­duced in­struc­tion set com­puter (RISC) ar­chi­tec­ture with two 7-stage in­te­ger pipe­lines, which al­lows ex­e­cu­tion of 2 dif­fer­ent in­struc­tions at the same time. Each G3MH core achieves the per­for­mance of 3.2 DMIPS/MHz (Note 3).

The RH850/V1R-M also in­cludes 2MB in­dus­try-high­est speed flash based on Re­ne­sas world-lead­ing au­to­mo­tive 40nm em­bed­ded flash tech­nol­ogy. By in­cor­po­rat­ing a large 2MB ca­pac­ity RAM, the RH850/V1R-M han­dles all spe­cific cal­cu­la­tions on radar cube data such as range and ve­loc­ity FFTs, dig­i­tal beam form­ing, con­stant false alarm rate (CFAR, Note 4) and peak de­tec­tion.

Pric­ing, avail­abil­ity

Sam­ples of the RH850/V1R-M and the DSP math li­brary will be avail­able from se­cond half of 2017. Sam­ples will be ten­ta­tively priced at US$30 per unit. Mass pro­duc­tion is sched­uled to be­gin in Novem­ber 2018. A flex­i­ble pro­gram­mable com­plete toolchain with C/C++ com­piler, de­bug­ger, simulation mod­els and de­tailed per­for­mance pro­fil­ing tools will also be avail­able.

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