Fujitsu MHW2040AC Manual Do Utilizador
Operations
6.1 Device Response to the Reset
This section describes how the PDIAG- and DASP- signals responds when the
power of the IDD is turned on or the IDD receives a reset or diagnostic command.
power of the IDD is turned on or the IDD receives a reset or diagnostic command.
6.1.1 Response to power-on
After the master device (device 0) releases its own power-on reset state, the master
device shall check a DASP- signal for least 500 ms to confirm presence of a slave
device (device 1). The master device recognizes 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 power-on
diagnostics.
device shall check a DASP- signal for least 500 ms to confirm presence of a slave
device (device 1). The master device recognizes 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 power-on
diagnostics.
If the master device cannot confirm assertion of the DASP- signal within 500 ms,
the master device recognizes that no slave device is connected.
the master device recognizes that no slave device is connected.
After the slave device (device 1) releases its own power-on reset state, the slave
device shall report its presence and the result of power-on diagnostics to the
master device as described below:
device shall report its presence and the result of power-on diagnostics to the
master device as described below:
DASP- signal: Asserted within 450 ms.
PDIAG- signal: Negated within 1 ms and asserted within 30 seconds.
The asserted PDIAG-signal is negated 30 seconds after it is asserted if the
command is not received.
command is not received.
6-2
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