Lexicon RV-8 Service Manual page 59

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CS49400_CHECKSUM_FAIL
CS8420_INIT_ERROR
CS8420_ISC_WR_TIMEOUT
CS8420_ISC_RD_TIMEOUT
CS8420_WRONG_VERSION
CS8420_WRONG_ID
These codes are used to interpret the diagnostic results from the Extended Diagnostic Repair Menu. The
Error code is 16-bits with the most significant byte always being 0x03.
The least significant byte is broken into bits as shown below:
(MSBit) B7 B6 B5 B4 B3 B2 B1 B0 (LSBit)
•
B7 - not used. Should always be 0.
•
B6 - GPIO LED failure, 1 indicates that neither LED lit up from the test.
•
B5 - Read Back Register Fail, 1 indicates the Read back register failed.
•
B4 - Test Fail, 1 indicates the test failed, 0 indicates success.
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B3 - SHARC Test Completed. 1 indicates that the SHARC was able to finish executing the test.
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B2 - READ Time out, 1 means that Hitachi could not read back from the SHARC. 1 indicates time out.
•
B1 - WRITE Time out, 1 is means there was a time out.
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B0 - SHARC processor id 0 is for Processor A and 1 for Processor B.
•
Bits B2, B1 and B0 are read together. If a time out occurs then B2 or B1 will indicate what operation
caused the fault, B0 will indicate which processor failed, Processor A or B.
•
Bit B3 is used to indicate whether the SHARC was able to run the code. If this bit is zero, the code
was not able to run; a 1 indicates the SHARC was able to run.
•
Bit B4 indicates whether the test passed or failed. This bit is only valid if B3 is a 1.
•
Bit B5 indicates that the read back register failed. There is a fault in the read back register circuitry if
this bit is a 1.
•
Bit B6 indicates whether the circuitry around the SHARC LEDS failed. A 1 indicates a failure.
When the SHARC passes these tests, it will return a value of 0x0300.
aYYYYYY: Failing address location
The address (in hexadecimal) where the failure occurred.
wZZ: Value Written
The target value (in hexadecimal) that was written to the address where the failure occurred.
0x11B
0x200
0x201
0x202
0x203
0x204
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