Fujitsu MHN2100AT, MHN2150AT, MHN2300AT, MHN2200AT Response to hardware reset, Response to power-on

6.1 Device Response to the Reset

Master device

Power On Reset-

Status Reg.

BSY bit

Slave device

Power On Reset- BSY bit

PDIAG-

DASP-

Power on

	Max. 31 sec.
Checks DASP- for up to	If presence of a slave device is
450 ms.	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