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ISO 9001 certified


embOS for Renesas RX was developed for and with the KPIT GNU compiler and supports all data memory models offered by this compiler.
embOS for RX comes with easy to use start projects for several RX CPUs which may be used with the HEW or e2studio.
Software development and debugging with E1/E20 emulator as well as using J-Link RX is supported.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1500 bytes
Kernel RAM usage 75 bytes
RAM usage per task control block 32 bytes
RAM usage per resource semaphore 16 bytes
RAM usage per counting semaphore 8 bytes
RAM usage per mailbox 24 bytes
RAM usage per software timer 20 bytes
RAM usage event 0 bytes
Min. stack-size per task (RAM) 44 bytes
Context switch time 0.9 µs
Interrupt latency time Zero
Kernel CPU usage/TICK Less than .1% 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 data given above were measured with embOS XRelease build on an RX71M CPU running at 240MHz..


Board support packages

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

CPU Eval board
Renesas RX111 Renesas RSKRX111
Renesas RX210 Renesas RPBRX210
Renesas RX210 Renesas RSKRX210
Reneass RX220 Renesas RSKRX220
Renesas RX621 Serious Integrated SIM205
Renesas RX62N Renesas RPBRX62N
Renesas RX62N Future Designs YRDKRX62N
Renesas RX62N Renesas RSKRX62N
Renesas RX610 Renesas RSKRX610
Renesas RX62T Renesas RSKRX62T
Renesas RX630 Renesas RSKRX630
Renesas RX64M Renesas RSKRX64M
Renesas RX71M Renesas RSKRX71M
Renesas RX63N Renesas YLCDRX63NE
Renesas RX63N Future Designs YRDKRX63N
Renesas RX63N Serious Integrated SIM225-A00