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ISO 9001 certified


embOS for SH2A was developed for and with IAR compiler.
It comes with easy to use start projects for IAR Embedded Workbench.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) Approx. 2000 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) Approx. 70/160 bytes (without/with FPU)
Context switch time 0.7 µs
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 XRelease build on an SH2A CPU running at 266 MHz.


Board support packages

embOS comes with lots of ready to go start projects and support packages for various SH2A CPUs and starterboards.

CPU Eval board
Renesas SH7203 Renesas RSKSH7203
Renesas SH2A7269 Renesas RSKSH2A7269
Renesas SH7267 Renesas SH7267 CPU board