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ISO 9001 certified


embOS for SH2A was developed for and with KPIT GNU compiler.
It comes with a start project for the RENESAS RSK7203 eval kit and supports CPUs with or without floating point unit.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) Approx. 2.4 Kbytes
Kernel RAM usage 49 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) Approx. 70/160 bytes (without/with FPU)
Context switch time Less than 1.7us
Interrupt latency time 0
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 release build on an SH2 CPU running at 200 MHz.


Board support packages

embOS comes with lots of ready to go start projects and support packages for various SH2 CPUs and starterboards.

CPU Eval board
Renesas SH7203 Renesas SH7203 evalboard