FUJITSU MHW2060AC - Manual (Page 246)

Operations
6.1.4 Response to diagnostic command
When the master device receives an EXECUTE DEVICE DIAGNOSTIC
command and the slave device is present, the master device checks the PDIAG-
signal for up to 6 seconds to see if the slave device has completed the self-
diagnosis successfully.
The master device does not check the DASP- signal.
After the slave device receives the EXECUTE DEVICE DIAGNOSTIC command,
it shall report the result of the self-diagnostics to the master device as described
below:
PDIAG- signal: negated within 1 ms and asserted within 5 seconds
The asserted PDIAG-signal is negated 5 seconds after it is asserted if the command
is not received. If the command is received, the PDIAG-signal is negated
according to timing at which the command is received.
When the IDD is set to a slave device, the IDD asserts the DASP- signal when
negating the PDIAG- signal.
Max. 6 sec.
Max. 5 sec.
Max. 1 ms.
If the slave device is preset, PDIAG- signal is checked for
up to6 seconds.
DASP-
PDIAG-
BSY bit
X'1F7' Reg.
Write
Status Reg.
BSY bit
Slave device
Master device
Figure 6.4 Response to diagnostic command
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