Fujitsu MHM2200AT Manual/User Guide - Page 205
Response to diagnostic command,
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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 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 Slave device BSY bit PDIAGDASP- Max. 6 sec. If the slave device is preset, PDIAG- signal is checked for up to6 seconds. Max. 1 ms. Max. 5 sec. Figure 6.4 Response to diagnostic command 6-6 C141-E104-03EN