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ISO 9001 certified


embOS for Renesas RZ was developed for and with the KPIT GNU compiler and supports all memory models offered by this compiler.

It comes with easy to use start projects. Initilization code for different Renesas RZ starter boards is included.

Software development with with JTAG tools like J-Link is possible.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1700 bytes
Kernel RAM usage 71 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. 20 µs (50 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 values given above were measured with embOS XRelease build on an Renesas RZ CPU running at 400MHz.


Board support packages

embOS comes with ready to go start projects and support packages for various ARM7 / ARM9 CPUs and starterboards.

CPU Eval board  
Renesas R7S72100 Renesas R7S72100 CPU board  
Renesas R7S72100 Renesas RSKRZA1