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Chapter 5 RAS Function
5.1 RAS Function Overview
The RAS hardware and software provide the following functions.
5.1.1
RAS Hardware
Internal diagnosis
Power ON/OFF function
Reset function
Interrupt output function
RAS memory function
5.1.2
RAS 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 C3 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
From the user program
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Circuit that detects internal abnormal conditions.
• WDT monitoring
• DRAM ECC error detection
• CPU temperature/CPU peripheral temperature rise detection
• Power voltage drop detection
• C3 built-in Battery failure detection
OFF detection of an input power supply, and control of a power
supply.
The function reset at the time of abnormalities
• Compulsive initialization switch (INZ switch)
• Compulsive hardware reset switch (RST switch)
Non-maskable interrupts (NMI) and maskable interrupts (MI) are
available.
NMI: Power off, WDT, initialize switch control
MI: CPU peripheral temperature rise, interval timer
(MI can be enabled/disabled by software)
Equipped with battery backed RAS memory (64K bytes) to save
information while running.
• Saving of error information
• Saving of user information
It can be used simply by registering the RAS window parameter
during installation.
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.
Computer module C3PU35 User's Manual
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