6.1.4Response 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 then negated within 6 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.

X'1F7' Reg.

Write

Master device

Status Reg.

BSY bit

Max. 6 sec.

If the slave device is preset, DASP- signal is checked for up to

6 seconds.

Slave device

BSY bit

Max. 1 ms.

PDIAG-

DASP-

Max. 5 sec.

Figure 6.4 Response to diagnostic command

C141-E110-02EN

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Fujitsu MPG3XXXAT manual Response to diagnostic command, Pdiag Dasp