Response To Hardware Reset; Figure 6.2 Response To Hardware Reset - Fujitsu MHM2100AT - Mobile 10 GB Hard Drive Product Manual

Operations

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.
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.
PDIAG- signal: Negated within 1 ms and asserted within 30 seconds.
Reset-
Master device
Status Reg.
BSY bit
Slave device
BSY bit
PDIAG-
DASP-
.
6-4
Checks DASP- for up to
450 ms.
Max. 1 ms.

Figure 6.2 Response to hardware reset

Max. 31 sec.
If presence of a slave device is
confirmed, PDIAG- is checked for
up to 31 seconds.
Max. 30 sec.
Max. 400 ms.
C141-E104-03EN