Response To Hardware Reset; Figure 6.1 Response To Power-On - Fujitsu MHU2100AT Product Manual

Master device
Power On Reset-
Status Reg.
BSY bit
Slave device
Power On Reset-
BSY bit
PDIAG-
DASP-
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
500 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-E202-01EN
Power on
Checks DASP- for up to
500 ms.
Max. 1 ms.

Figure 6.1 Response to power-on

6.1 Device Response to the Reset
Max. 31 sec.
If presence of a slave device is
confirmed, PDIAG- is checked for
up to 31 seconds.
Max. 30 sec.
Max. 450 ms.
6-3