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Fault Log Messages
0 Unknown Fault This error message occurs when the fault could not be determined.
1 I2C: Timeout This error message occurs if the A7 CPU assembly’s IIC controller takes too long to tell the
MPU that it is ready for a new command.
2 I2C: No Device
Acknowledge
This error message occurs if the A7 CPU assembly’s IIC controller does not sense the
acknowledge part of the formal handshake used to transmit data over the IIC bus.
3 Calibration failure This error message occurs if the calibration routine generates correction vectors that exceed the
maximum allowable error vectors or if the calibration routine is bypassed because of a
hardware failure.
4 ROM
Checksum error
This error message occurs if the power-on test detects a ROM checksum error.
5 BOOTROM
Checksum Error
This error message occurs if the power-on test detects a BOOTROM checksum error.
6 DSP Failure This error message occurs if the power-on digital signal processor test fails.
7 Main RAM Error This error message occurs if the power-on RAM test fails.
8 Math
Coprocessor
Failure
This error message occurs if the power-on math coprocessor test fails.
9 LED Error This error message occurs if the power-on LED test fails.
10 Display Failure This error message occurs if the power-on display test fails.
11 CPU Failure This error message occurs if the power-on CPU test fails.
12 Floppy Controller
Timeout
This error message occurs if the A7 CPU assembly’s disk drive controller did not respond
within 10 ms of receiving a command.
13 Internal Disk
Trk0 Failure
This error message occurs if the A100 Disk Drive assembly did not locate track 0 (as indicated
by a low on T00n) when instructed by the A7 CPU assembly to move to track 0.
14 NVRAM or
Battery Backup
Failure
This error message occurs if the A7 CPU assembly’s IIC Controller determined that the A8
Memory assembly’s non-volatile RAM or RAM battery power failed.
Agilent 35670A Internal Test Descriptions
Fault Log Messages
10-9