Fujitsu MPF3XXXAH manual Response to hardware reset

6.1.2Response 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.

After the slave device receives the hardware reset, the slave device shall report its presence and the result of the self-diagnostics to the master device as described below:

DASP- signal: Asserted within 400 ms, and negated after the first command is received from the host or within 31 seconds or after executing software reset, which ever comes first.

PDIAG- signal: Negated within 1 ms and asserted within 30 seconds, then negated within 31 seconds

Reset-

Master device

	Status Reg.
￿	BSY bit		Max. 31 sec.
			If presence of a slave device is
		Checks DASP- for up to
			confirmed, PDIAG- is checked for
		450 ms.	up to 31 seconds.

Slave device

BSY bit

Max. 1 ms.

PDIAG- Max. 30 sec.

DASP-

Max. 400 ms.

Max. 31 sec.

Figure 6.2 Response to hardware reset

C141-E106-01EN 6 - 3