page_title: V850
section_title: Application systems
hierarchical_section_title: V850 / Application systems
caption_attribution_description: 中文（繁體）‎: Quantum Fireball EL51A881 3.5吋硬碟背面
context_page_description: V850 is the trademark name for a 32-bit RISC CPU architecture of Renesas Electronics for embedded microcontrollers, introduced in the early 1990s by NEC and still being developed as of 2018.
  V850 Family has been evolved by many microarchitecture extensions until today, but all the extensions have binary code level backward compatibility of programs across a quarter century. Its basis is 32 of 32-bit general-purpose registers with load/store architecture. It has high code efficiency because most of frequently used instructions are mapped into 16-bit half-word.
  In its earlier stage, it mainly focused on ultra-low power consumption such as 0.5 mW/MIPS. V850 has been widely used in variety of applications including: optical disk drives, hard disk drives, mobile phones, car audio and inverter compressors for air conditioners. But today, new microarchitectures are mainly toward high performance and high reliability with such as dual-lockstep redundant mechanism for automotive industry. Nowadays, V850 Family and RH850 Family are comprehensively used in a car.
context_section_description: The first V850 CPU core was used for many DVD drives manufactured by NEC Corporation, then Sony Optiarc.NEC Electronics (currently Renesas Electronics) itself intensively developed application-specific standard products (ASSPs) for optical disk drives named SCOMBO® Series.
  This first generation of processor core was also used for hard disk drives manufactured by Quantum Corporation (see the photo).
  The V850/xxn  product line, started with V850/SA1
  and V850/SV1
  expanded its application to ultra-lo-power products such as "handy camcorders."
  It has main and sub internal oscillator amplifier working from 1.8 V to 3.6 V with external resonator, such as crystal and ceramic.
  Software STOP mode, which internal watch timer operates with 32.768 kHz sub-oscillator, consumes typically 8μA of electrical current only.
  NEC also launched  V850/SB1
  for car audio with IEBus controller in 1998, which is ultra-low power (3.6 mW@5 V/MIPS) and ultra-low noise (EMI/EMS) 5 V product.
  And V850/SC1
  was also for "car audio".
  These strategical product line expansion well succeeded to enlarge the number of sold devices.
  This first generation of V850 core is also used for some NEC's mobile phones.
  It is also used for the programmable host CPU of some small form factor "GSM/GPRS with GPS" embedded modem modules.
  In the next phase, NEC targeted the automotive industry with a CAN bus controller on V850
  as V850/SF1 at last.
  The automotive industry became the main target of V850 and RH850 later on.
  The V850E core targeted SoC as well as standard products,
  used for some Japanese domestic mobile phones, including Sony Mobile's and NEC's.V850E and V850ES are also used for air conditioning inverter compressors.
  At this stage, one of mass market was car audio.
  The V850ES core succeeded low power embedded product line,
  which is ISA compatible with V850E.
  NEC Electronics (currently, Renesas Electronics) adopt V850 CPU core for its "USB 3.0" controllers.
  Around 2005, feasibility study for "FlexRay" controller on V850E platform had been started in several companies. Yokogawa Digital Computer (currently DTS INSIGHT) developed evaluation board named GT200; with a V850E/IA1 and a FPGA, which employs "FlexRay" controller developed by Bosch.
  The V850E2 core primary targeted automotive areas,
  but was also used for NEC's mobile phones.
  Current V850 Family line up (including Renesas RH850 Family, based on V850E3 core, as of 2018) covers mainly automotive applications as well as "inter equipment connectivity" and "motor-control" specific MCUs.
  The V850 Family (based on V850E, V850ES, and V850E2 cores) and the RH850 Family (based on V850E3 core, as of 2018) are used in automotive industry comprehensively.
caption: μPD70F3017GC‑25; V850/SA1 marked "EL4" on Quantum Fireball EL51A881
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