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ISO 9001 certified

V850/E/ES, Green Hills

embOS for NEC V850 was developed for and with Green Hills compiler and supports all memory models offered by this compiler. It comes in two versions with an easy to use start project for Green Hills Multi 1.8.9 and Multi 2000 embedded workbench. Software development with debugger and simulator is supported.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) 1708 bytes
Kernel RAM usage 41 bytes
RAM usage per task control block 32 bytes
RAM usage per resource semaphore 8 bytes
RAM usage per counting semaphore 8 bytes
RAM usage per mailbox 20 bytes
RAM usage per software timer 20 bytes
RAM usage event 0 bytes
Min. stack-size per task (RAM) 256 bytes
Context switch time Max. 192 clock cycles (6 µs), independent of number of tasks
Interrupt latency time Max. 64 clock cycles (2 µs)
Kernel CPU usage/TICK Less than .15% of total calculation time at 1000 interrupts/second (1ms TICK)
Basic time unit (TICK) Typ. 1 ms, min. 10 µs (100 kHz interrupt frequency)
Max. no. of tasks Unlimited (by available RAM only)
Max. no. of mailboxes Unlimited (by available RAM only)
Max. no. of semaphores Unlimited (by available RAM only)
Max. no. of software timers Unlimited (by available RAM only)
Max. no. of priorities Unlimited
Stack size idle task (RAM) 0 (no memory needed)
Nested interrupts Permitted
Task switches from within ISR Possible

Absolute timings given above were measured with embOS release build on an V850EMS1 CPU running at 32MHz.


Board support packages

embOS comes with lots of ready to go start projects and support packages for various CPUs and starterboards.

CPU Eval board
Renesas V850EIA1 Renesas V850EIA1 evalboard
Renesas V850EMS1 Renesas V850EMS1 evalboard
Renesas V850E2MN4 Renesas V850E2MN4 evalboard
Renesas V850ESJG2 Renesas V850ESJG2 evalboard