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HI7700/4 Real-time OS for SuperH Family

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Kernel specifications

Item Specification
Specifications/Functions:
  • Supports the following functions including uITRON4.0 spec-compliant standard profile.
    • Service calls for dynamic object creation(cre_???, acre_???) and deletion(del_???)
    • Mutex (TA_CEIL attribute only)
    • Message buffer
    • Variable-length memory pool
    • Alarm handler
    • Over handler
  • The following are the Renesas-specific functions
    • Task-attached event flag
    • Cache support function
Scheduling types: Priority basis type / Event-driven type
Target CPU: SH-3, SH3-DSP, SH4AL-DSP
*MMU is not supported.
Service call number: 152
(Count xxx_yyy plus ixxx_yyy as one)
Maximum object number: 1023 (Only the cycle handler and the alarm handler have 15 each)
A maximum value can be selected with the configurator
Maximum Priority number: 255, A maximum value can be selected with the configurator
Application operating mode: All application programs are operated in priviledged mode
Performance
(Time takes for a target task to be executed after the wup_tas is issued.):
1.3 microseconds (SH73180@216MHz, cache enabled)
Kernel code size: From 7.5K bytes to 46K bytes
Kernel data size: Minimum 169 bytes

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