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FUJITSU MHA2032AT User Manual

Page 147

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Operations

6-6

C141-E042-01EN

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

When the IDD is set to a slave device, the IDD asserts the DASP- signal when
negating the PDIAG- signal, and negates the DASP- signal when asserting the
PDIAG- signal.

Figure 6.4 Response to diagnostic command

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