FOXBORO FBM242 P0916TA Axial displacement module

Upon a reset/powerup condition the debugger asserts the VMEbus SYSFAIL* line (refer to the VMEbus specification). SYSFAIL* stays asserted if any of the following has occurred: 

❏ Confidence test failure 

❏ NVRAM checksum error 

❏ NVRAM low battery condition 

❏ Local memory configuration status 

❏ Self test (if system mode) has completed with error 

❏ MPU clock speed calculation failure

After debugger initialization 

is done and none of the above situations have occurred, the SYSFAIL* line is negated. This indicates to the user or VMEbus masters the state of the debugger. In a multi-computer configuration, other VMEbus masters could view the pertinent control and status registers to determine which CPU is asserting SYSFAIL*. SYSFAIL* assertion/negation is also affected by the ENV command. Refer to Appendix A.

Break Sequence 1. Removes any breakpoints in your code and keeps the breakpoint table intact. 2. Takes a snapshot of the machine state if the function was entered using SYSCALL. This machine state is then accessible to you for diagnostic purposes

MPU Clock Speed Calculation 

The clock speed of the microprocessor is calculated and checked against a user definable parameter contained in NVRAM (refer to the CNFG command in Appendix A). If the check fails, a warning message is displayed.

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