Diagnostic Code - Fujitsu MPG3XXXAH Product Manual

Both devices shall execute self-diagnosis.
The device 0 waits for up to 5 seconds until device 1 asserts the PDIAG- signal.
If the device 1 does not assert the PDIAG- signal but indicates an error, the device 0 shall
append X'80' to its own diagnostic status.
The device 0 clears the BSY bit of the Status register and generates an interrupt. (The device
1 does not generate an interrupt.)
A diagnostic status of the device 0 is read by the host system. When a diagnostic failure of
the device 1 is detected, the host system can read a status of the device 1 by setting the DV bit
(selecting the device 1).
When device 1 is not present:
The device 0 posts only the results of its own self-diagnosis.
The device 0 clears the BSY bit of the Status register, and generates an interrupt.
Table 5.7 lists the diagnostic code written in the Error register which is 8-bit code.
If the device 1 fails the self-diagnosis, the device 0 "ORs" X'80' with its own status and sets that
code to the Error register.
At command issuance (I/O registers setting contents)
1F7 (CM)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
At command completion (I/O registers contents to be read)
1F7 (ST)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (ER)
H
5 - 40
Table 5.7

Diagnostic code

Code Result of diagnostic
X'01' No error detected.
X'03' Data buffer compare error
X'05' ROM sum check error
X'8x' Failure of device 1
1 0 0 1
DV
xx
xx
xx
xx
xx
Status information
00
00
00
01
01
Diagnostic code
C141-E112-01EN
0 0 0 0
xx
H
H