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Standby mode
Entering standby mode
Returning from standby mode
Idle mode
Active mode
4.5.5
EXECUTE DEVICE DIAGNOSTIC (X'90')
Table 4.25 EXECUTE DEVICE DIAGNOSTIC command
7
CM
1
DH
X
CH
X
CL
X
SN
X
SC
X
FR
X
When the ODD receives this command, it recognizes self-diagnostics.
When the ODD receives this command, it responds to the command regardless of the DRV bit
value; this means that the drive is unit 0 or 1.
When the ODD is device 0 (master), its response after the command is received depends on
whether device 1 (slave) is connected.
When no device 1 is connected
The ODD sets X'01' in the Error register and terminates the command.
When device 1 is connected
The ODD monitors the PDIAG- signal sent from device 1 for six seconds. If device 1 asserts the
PDIAG- signal within this time, the ODD recognizes that the device 1 self-diagnostic test ends
successfully.
Otherwise, the ODD recognizes that the device 1 self-diagnostic test ended
Table 4.24 Power mode indication
Power mode status
6
5
4
0
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
C156-E142-02EN
SC register
00h
00h
00h
FFh
FFh
Bit
3
2
0
0
X
X
X
X
X
X
X
X
X
X
X
X
1
0
0
0
X
X
X
X
X
X
X
X
X
X
X
X
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