Fujitsu MHT2030AT Manual/User Guide - Page 226
Response to diagnostic command, negated within 1 ms and asserted within 5 seconds
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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 PDIAGsignal for up to 6 seconds to see if the slave device has completed the selfdiagnosis 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. X'1F7' Reg. Write Master device Status Reg. BSY bit Max. 6 sec. If the slave device is preset, PDIAG- signal is checked for up to6 seconds. Slave device BSY bit PDIAGDASP- Max. 1 ms. Max. 5 sec. Figure 6.4 Response to diagnostic command 6-6 C141-E192-02EN