Chapter 5 RAS Function
5.1 RAS Function Overview
The RAS hardware and software provide the following functions.
5.1.1 | RAS Hardware |
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| Internal diagnosis | Circuit that detects internal abnormal conditions. |
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| • WDT monitoring |
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| • DRAM ECC error detection |
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| • CPU temperature/CPU peripheral temperature rise detection |
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| • Power voltage drop detection |
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| • C2 |
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| Power ON/OFF function | OFF detection of an input power supply, and control of a power |
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| supply. |
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| Reset function | The function reset at the time of abnormalities |
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| • Compulsive initialization switch (INZ switch) |
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| • Compulsive hardware reset switch (RST switch) |
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| Interrupt output function | |
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| available. |
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| NMI: Power off, WDT, initialize switch control |
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| MI: CPU peripheral temperature rise, interval timer |
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| (MI can be enabled/disabled by software) |
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| RAS memory function | Equipped with battery backed RAS memory (64K bytes) to save |
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| information while running. |
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| • Saving of error information |
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| • Saving of user information |
5.1.2RAS Support Software
This section provides a general description of the RAS support software. Refer to the "Computer module C2/C3 Windows User’s Manual (6F8C0894)" for more information concerning RAS function software processing.
The Windows version C2 is shipped with the RAS support software installed.
The RAS support software consists of RAS hardware drivers and RAS software libraries and there are two ways to use it.
From the RAS windows | It can be used simply by registering the RAS window parameter |
| during installation. |
From the user program | Used by creating a user application program using RAS |
| commands in VC (Visual C++) or VB (Visual Basic) for the |
| specific purpose. |
| Sufficient knowledge of the hardware functions is necessary to |
| create the program. |
36 | Computer module C2PU37 User’s Manual |
