Fujitsu MPB3052AT Manual Do Utilizador
C141-E045-02EN
6 - 2
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 up to 450 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.
shall check a DASP- signal for up to 450 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 450 ms, the master
device recognizes that no slave device is connected.
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:
report its presence and the result of power-on diagnostics to the master device as described
below:
DASP- signal: Asserted within 400 ms.
PDIAG- signal: Negated within 1 ms and asserted within 30 seconds.
PDIAG- signal: Negated within 1 ms and asserted within 30 seconds.
Max. 400 ms.
Max. 30 sec.
Max. 1 ms.
If presence of a slave device is
confirmed, PDIAG- is checked for
up to 31 seconds.
confirmed, PDIAG- is checked for
up to 31 seconds.
Checks DASP- for up to
450 ms.
450 ms.
Max. 31 sec.
DASP-
PDIAG-
BSY bit
Power On Reset-
Status Reg.
BSY bit
BSY bit
Power On Reset-
Slave device
Master device
Power on
Figure 6.1
Response to power-on