Operations
6-2
C141-E042-01EN
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.
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 sucessfully 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.
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:
DASP- signal: Asserted within 400 ms.
PDIAG- signal: Negated within 1 ms and asserted within 14 seconds.
Summary of Contents for MHA2021AT
Page 1: ...C141 E042 01EN MHA2021AT MHA2032AT DISK DRIVES PRODUCT MANUAL ...
Page 40: ...Installation Conditions 3 12 C141 E042 01EN Figure 3 14 Example 2 of Cable Select ...
Page 45: ...4 3 Circuit Configuration C141 E042 01EN 4 5 Figure 4 2 Circuit Configuration ...
Page 51: ...4 6 Read write Circuit C141 E042 01EN 4 11 Figure 4 4 Read write circuit block diagram ...
Page 136: ...5 4 Command Protocol C141 E042 01EN 5 75 Figure 5 7 Normal DMA data transfer ...
Page 138: ...5 5 Timing C141 E042 01EN 5 77 Figure 5 8 Data transfer timing ...
Page 144: ...6 1 Device Response to the Reset C141 E042 01EN 6 3 Figure 6 1 Response to power on ...
Page 177: ......