Fujitsu MHN2150AT Manual/User Guide - Page 205
Response to hardware reset
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Master device Power On Reset- Status Reg. BSY bit Slave device Power On Reset- BSY bit PDIAGDASP- Power on 6.1 Device Response to the Reset Max. 31 sec. Checks DASP- for up to 450 ms. If presence of a slave device is confirmed, PDIAG- is checked for up to 31 seconds. Max. 1 ms. Max. 30 sec. Max. 400 ms. Figure 6.1 Response to power-on Note: Figure 6.1 has a assumption that the device is kept on the power-off condition for more than 5 sec before the device power is turned on. 6.1.2 Response to hardware reset Response to RESET- (hardware reset through the interface) is similar to the power-on reset. Upon receipt of hardware reset, the master device checks a DASP- signal for up to 450 ms to confirm presence of a slave device. The master device recognizes the presence of the slave device when it confirms assertion of the DASP- signal. Then the master device checks a PDIAG- signal to see if the slave device has successfully completed the self-diagnostics. If the master device cannot confirm assertion of the DASP- signal within 450 ms, the master device recognizes that no slave device is connected. C141-E120-02EN 6-3